Rollup merge of #134207 - jieyouxu:revert-134040, r=lqd

Revert "bootstrap: print{ln}! -> eprint{ln}! (take 2) #134040"

Unfortunately, #134040 is proving to have caused more output interleaving problems that are tricky to diagnose and fix, and I think we probably should leave these untouched as bootstrap and compiletest has a bunch of interconnecting parts, and the commands and tools that they exercise do not consistently use stderr/stdout either. This causes hard-to-diagnose output interleaving bugs, which unfortunately degrades contributor experience.

This PR reverts two PRs in order to cleanly revert #134040:

1. Revert #134123 which is a fix-forward after #134040.
2. Revert #134040 itself.

I don't regret the initial effort `@clubby789,` and thank you for making the attempts, but I think we need to refrain from touching too many of these at once because some of the interleaving are very non-obvious and we don't have test coverage for.

r? `@clubby789`
cc `@Zalathar`

21 files changed, 149 insertions, 153 deletions

diff --git a/src/bootstrap/src/bin/main.rs b/src/bootstrap/src/bin/main.rs
index 74dfe2e7ec8..ee813de1c9e 100644
--- a/src/bootstrap/src/bin/main.rs
+++ b/src/bootstrap/src/bin/main.rs
@@ -48,9 +48,9 @@ fn main() {
             err => {
                 drop(err);
                 if let Ok(pid) = pid {
-                    eprintln!("WARNING: build directory locked by process {pid}, waiting for lock");
+                    println!("WARNING: build directory locked by process {pid}, waiting for lock");
                 } else {
-                    eprintln!("WARNING: build directory locked, waiting for lock");
+                    println!("WARNING: build directory locked, waiting for lock");
                 }
                 let mut lock = t!(build_lock.write());
                 t!(lock.write(process::id().to_string().as_ref()));
@@ -70,13 +70,13 @@ fn main() {
     // changelog warning, not the `x.py setup` message.
     let suggest_setup = config.config.is_none() && !matches!(config.cmd, Subcommand::Setup { .. });
     if suggest_setup {
-        eprintln!("WARNING: you have not made a `config.toml`");
-        eprintln!(
+        println!("WARNING: you have not made a `config.toml`");
+        println!(
             "HELP: consider running `./x.py setup` or copying `config.example.toml` by running \
             `cp config.example.toml config.toml`"
         );
     } else if let Some(suggestion) = &changelog_suggestion {
-        eprintln!("{suggestion}");
+        println!("{suggestion}");
     }
 
     let pre_commit = config.src.join(".git").join("hooks").join("pre-commit");
@@ -86,13 +86,13 @@ fn main() {
     Build::new(config).build();
 
     if suggest_setup {
-        eprintln!("WARNING: you have not made a `config.toml`");
-        eprintln!(
+        println!("WARNING: you have not made a `config.toml`");
+        println!(
             "HELP: consider running `./x.py setup` or copying `config.example.toml` by running \
             `cp config.example.toml config.toml`"
         );
     } else if let Some(suggestion) = &changelog_suggestion {
-        eprintln!("{suggestion}");
+        println!("{suggestion}");
     }
 
     // Give a warning if the pre-commit script is in pre-commit and not pre-push.
@@ -102,14 +102,14 @@ fn main() {
     if fs::read_to_string(pre_commit).is_ok_and(|contents| {
         contents.contains("https://github.com/rust-lang/rust/issues/77620#issuecomment-705144570")
     }) {
-        eprintln!(
+        println!(
             "WARNING: You have the pre-push script installed to .git/hooks/pre-commit. \
                   Consider moving it to .git/hooks/pre-push instead, which runs less often."
         );
     }
 
     if suggest_setup || changelog_suggestion.is_some() {
-        eprintln!("NOTE: this message was printed twice to make it more likely to be seen");
+        println!("NOTE: this message was printed twice to make it more likely to be seen");
     }
 
     if dump_bootstrap_shims {
diff --git a/src/bootstrap/src/bin/rustc.rs b/src/bootstrap/src/bin/rustc.rs
index e57ed488f97..88595ff7e51 100644
--- a/src/bootstrap/src/bin/rustc.rs
+++ b/src/bootstrap/src/bin/rustc.rs
@@ -306,7 +306,7 @@ fn main() {
         // should run on success, after this block.
     }
     if verbose > 0 {
-        eprintln!("\nDid not run successfully: {status}\n{cmd:?}\n-------------");
+        println!("\nDid not run successfully: {status}\n{cmd:?}\n-------------");
     }
 
     if let Some(mut on_fail) = on_fail {
diff --git a/src/bootstrap/src/core/build_steps/check.rs b/src/bootstrap/src/core/build_steps/check.rs
index 2af2e83db8f..d46c0ab7fef 100644
--- a/src/bootstrap/src/core/build_steps/check.rs
+++ b/src/bootstrap/src/core/build_steps/check.rs
@@ -287,7 +287,7 @@ impl Step for CodegenBackend {
     fn run(self, builder: &Builder<'_>) {
         // FIXME: remove once https://github.com/rust-lang/rust/issues/112393 is resolved
         if builder.build.config.vendor && self.backend == "gcc" {
-            eprintln!("Skipping checking of `rustc_codegen_gcc` with vendoring enabled.");
+            println!("Skipping checking of `rustc_codegen_gcc` with vendoring enabled.");
             return;
         }
 
diff --git a/src/bootstrap/src/core/build_steps/compile.rs b/src/bootstrap/src/core/build_steps/compile.rs
index 93f8091299f..0cacd6e4f37 100644
--- a/src/bootstrap/src/core/build_steps/compile.rs
+++ b/src/bootstrap/src/core/build_steps/compile.rs
@@ -1611,7 +1611,7 @@ impl Step for Sysroot {
         let sysroot = sysroot_dir(compiler.stage);
 
         builder
-            .verbose(|| eprintln!("Removing sysroot {} to avoid caching bugs", sysroot.display()));
+            .verbose(|| println!("Removing sysroot {} to avoid caching bugs", sysroot.display()));
         let _ = fs::remove_dir_all(&sysroot);
         t!(fs::create_dir_all(&sysroot));
 
@@ -1681,7 +1681,7 @@ impl Step for Sysroot {
                     return true;
                 }
                 if !filtered_files.iter().all(|f| f != path.file_name().unwrap()) {
-                    builder.verbose_than(1, || eprintln!("ignoring {}", path.display()));
+                    builder.verbose_than(1, || println!("ignoring {}", path.display()));
                     false
                 } else {
                     true
@@ -2240,7 +2240,7 @@ pub fn stream_cargo(
         cargo.arg(arg);
     }
 
-    builder.verbose(|| eprintln!("running: {cargo:?}"));
+    builder.verbose(|| println!("running: {cargo:?}"));
 
     if builder.config.dry_run() {
         return true;
@@ -2266,7 +2266,7 @@ pub fn stream_cargo(
                 cb(msg)
             }
             // If this was informational, just print it out and continue
-            Err(_) => eprintln!("{line}"),
+            Err(_) => println!("{line}"),
         }
     }
 
diff --git a/src/bootstrap/src/core/build_steps/dist.rs b/src/bootstrap/src/core/build_steps/dist.rs
index 57fce206f95..0c739115165 100644
--- a/src/bootstrap/src/core/build_steps/dist.rs
+++ b/src/bootstrap/src/core/build_steps/dist.rs
@@ -2080,7 +2080,7 @@ fn maybe_install_llvm(
     {
         let mut cmd = command(llvm_config);
         cmd.arg("--libfiles");
-        builder.verbose(|| eprintln!("running {cmd:?}"));
+        builder.verbose(|| println!("running {cmd:?}"));
         let files = cmd.run_capture_stdout(builder).stdout();
         let build_llvm_out = &builder.llvm_out(builder.config.build);
         let target_llvm_out = &builder.llvm_out(target);
diff --git a/src/bootstrap/src/core/build_steps/format.rs b/src/bootstrap/src/core/build_steps/format.rs
index d32e06d8748..29a96f77672 100644
--- a/src/bootstrap/src/core/build_steps/format.rs
+++ b/src/bootstrap/src/core/build_steps/format.rs
@@ -107,10 +107,10 @@ fn print_paths(verb: &str, adjective: Option<&str>, paths: &[String]) {
         if let Some(adjective) = adjective { format!("{adjective} ") } else { String::new() };
     if len <= 10 {
         for path in paths {
-            eprintln!("fmt: {verb} {adjective}file {path}");
+            println!("fmt: {verb} {adjective}file {path}");
         }
     } else {
-        eprintln!("fmt: {verb} {len} {adjective}files");
+        println!("fmt: {verb} {len} {adjective}files");
     }
 }
 
@@ -199,7 +199,7 @@ pub fn format(build: &Builder<'_>, check: bool, all: bool, paths: &[PathBuf]) {
                 match get_modified_rs_files(build) {
                     Ok(Some(files)) => {
                         if files.is_empty() {
-                            eprintln!("fmt info: No modified files detected for formatting.");
+                            println!("fmt info: No modified files detected for formatting.");
                             return;
                         }
 
diff --git a/src/bootstrap/src/core/build_steps/setup.rs b/src/bootstrap/src/core/build_steps/setup.rs
index 175e9982cc1..7ed01f25c94 100644
--- a/src/bootstrap/src/core/build_steps/setup.rs
+++ b/src/bootstrap/src/core/build_steps/setup.rs
@@ -134,7 +134,7 @@ impl Step for Profile {
                     t!(fs::remove_file(path));
                 }
                 _ => {
-                    eprintln!("Exiting.");
+                    println!("Exiting.");
                     crate::exit!(1);
                 }
             }
@@ -184,15 +184,15 @@ pub fn setup(config: &Config, profile: Profile) {
         Profile::Dist => &["dist", "build"],
     };
 
-    eprintln!();
+    println!();
 
-    eprintln!("To get started, try one of the following commands:");
+    println!("To get started, try one of the following commands:");
     for cmd in suggestions {
-        eprintln!("- `x.py {cmd}`");
+        println!("- `x.py {cmd}`");
     }
 
     if profile != Profile::Dist {
-        eprintln!(
+        println!(
             "For more suggestions, see https://rustc-dev-guide.rust-lang.org/building/suggested.html"
         );
     }
@@ -224,7 +224,7 @@ fn setup_config_toml(path: &PathBuf, profile: Profile, config: &Config) {
     t!(fs::write(path, settings));
 
     let include_path = profile.include_path(&config.src);
-    eprintln!("`x.py` will now use the configuration at {}", include_path.display());
+    println!("`x.py` will now use the configuration at {}", include_path.display());
 }
 
 /// Creates a toolchain link for stage1 using `rustup`
@@ -256,7 +256,7 @@ impl Step for Link {
         }
 
         if !rustup_installed(builder) {
-            eprintln!("WARNING: `rustup` is not installed; Skipping `stage1` toolchain linking.");
+            println!("WARNING: `rustup` is not installed; Skipping `stage1` toolchain linking.");
             return;
         }
 
@@ -296,7 +296,7 @@ fn attempt_toolchain_link(builder: &Builder<'_>, stage_path: &str) {
     }
 
     if try_link_toolchain(builder, stage_path) {
-        eprintln!(
+        println!(
             "Added `stage1` rustup toolchain; try `cargo +stage1 build` on a separate rust project to run a newly-built toolchain"
         );
     } else {
@@ -321,14 +321,14 @@ fn toolchain_is_linked(builder: &Builder<'_>) -> bool {
                 return false;
             }
             // The toolchain has already been linked.
-            eprintln!(
+            println!(
                 "`stage1` toolchain already linked; not attempting to link `stage1` toolchain"
             );
         }
         None => {
             // In this case, we don't know if the `stage1` toolchain has been linked;
             // but `rustup` failed, so let's not go any further.
-            eprintln!(
+            println!(
                 "`rustup` failed to list current toolchains; not attempting to link `stage1` toolchain"
             );
         }
@@ -389,12 +389,12 @@ pub fn interactive_path() -> io::Result<Profile> {
         input.parse()
     }
 
-    eprintln!("Welcome to the Rust project! What do you want to do with x.py?");
+    println!("Welcome to the Rust project! What do you want to do with x.py?");
     for ((letter, _), profile) in abbrev_all() {
-        eprintln!("{}) {}: {}", letter, profile, profile.purpose());
+        println!("{}) {}: {}", letter, profile, profile.purpose());
     }
     let template = loop {
-        eprint!(
+        print!(
             "Please choose one ({}): ",
             abbrev_all().map(|((l, _), _)| l).collect::<Vec<_>>().join("/")
         );
@@ -428,7 +428,7 @@ enum PromptResult {
 fn prompt_user(prompt: &str) -> io::Result<Option<PromptResult>> {
     let mut input = String::new();
     loop {
-        eprint!("{prompt} ");
+        print!("{prompt} ");
         io::stdout().flush()?;
         input.clear();
         io::stdin().read_line(&mut input)?;
@@ -490,7 +490,7 @@ fn install_git_hook_maybe(builder: &Builder<'_>, config: &Config) -> io::Result<
         return Ok(());
     }
 
-    eprintln!(
+    println!(
         "\nRust's CI will automatically fail if it doesn't pass `tidy`, the internal tool for ensuring code quality.
 If you'd like, x.py can install a git hook for you that will automatically run `test tidy` before
 pushing your code to ensure your code is up to par. If you decide later that this behavior is
@@ -498,7 +498,7 @@ undesirable, simply delete the `pre-push` file from .git/hooks."
     );
 
     if prompt_user("Would you like to install the git hook?: [y/N]")? != Some(PromptResult::Yes) {
-        eprintln!("Ok, skipping installation!");
+        println!("Ok, skipping installation!");
         return Ok(());
     }
     if !hooks_dir.exists() {
@@ -515,7 +515,7 @@ undesirable, simply delete the `pre-push` file from .git/hooks."
             );
             return Err(e);
         }
-        Ok(_) => eprintln!("Linked `src/etc/pre-push.sh` to `.git/hooks/pre-push`"),
+        Ok(_) => println!("Linked `src/etc/pre-push.sh` to `.git/hooks/pre-push`"),
     };
     Ok(())
 }
@@ -541,7 +541,7 @@ Select which editor you would like to set up [default: None]: ";
 
         let mut input = String::new();
         loop {
-            eprint!("{}", prompt_str);
+            print!("{}", prompt_str);
             io::stdout().flush()?;
             input.clear();
             io::stdin().read_line(&mut input)?;
@@ -656,7 +656,7 @@ impl Step for Editor {
                 if let Some(editor_kind) = editor_kind {
                     while !t!(create_editor_settings_maybe(config, editor_kind.clone())) {}
                 } else {
-                    eprintln!("Ok, skipping editor setup!");
+                    println!("Ok, skipping editor setup!");
                 }
             }
             Err(e) => eprintln!("Could not determine the editor: {e}"),
@@ -689,7 +689,7 @@ fn create_editor_settings_maybe(config: &Config, editor: EditorKind) -> io::Resu
             mismatched_settings = Some(false);
         }
     }
-    eprintln!(
+    println!(
         "\nx.py can automatically install the recommended `{settings_filename}` file for rustc development"
     );
 
@@ -708,7 +708,7 @@ fn create_editor_settings_maybe(config: &Config, editor: EditorKind) -> io::Resu
         Some(PromptResult::Yes) => true,
         Some(PromptResult::Print) => false,
         _ => {
-            eprintln!("Ok, skipping settings!");
+            println!("Ok, skipping settings!");
             return Ok(true);
         }
     };
@@ -735,9 +735,9 @@ fn create_editor_settings_maybe(config: &Config, editor: EditorKind) -> io::Resu
             _ => "Created",
         };
         fs::write(&settings_path, editor.settings_template())?;
-        eprintln!("{verb} `{}`", settings_filename);
+        println!("{verb} `{}`", settings_filename);
     } else {
-        eprintln!("\n{}", editor.settings_template());
+        println!("\n{}", editor.settings_template());
     }
     Ok(should_create)
 }
diff --git a/src/bootstrap/src/core/build_steps/suggest.rs b/src/bootstrap/src/core/build_steps/suggest.rs
index 7b2d9fff8f5..ba9b1b2fc33 100644
--- a/src/bootstrap/src/core/build_steps/suggest.rs
+++ b/src/bootstrap/src/core/build_steps/suggest.rs
@@ -66,6 +66,6 @@ pub fn suggest(builder: &Builder<'_>, run: bool) {
             build.build();
         }
     } else {
-        eprintln!("HELP: consider using the `--run` flag to automatically run suggested tests");
+        println!("HELP: consider using the `--run` flag to automatically run suggested tests");
     }
 }
diff --git a/src/bootstrap/src/core/build_steps/test.rs b/src/bootstrap/src/core/build_steps/test.rs
index 380626952b2..30fdea7e19e 100644
--- a/src/bootstrap/src/core/build_steps/test.rs
+++ b/src/bootstrap/src/core/build_steps/test.rs
@@ -471,11 +471,11 @@ impl Miri {
         // We re-use the `cargo` from above.
         cargo.arg("--print-sysroot");
 
-        builder.verbose(|| eprintln!("running: {cargo:?}"));
+        builder.verbose(|| println!("running: {cargo:?}"));
         let stdout = cargo.run_capture_stdout(builder).stdout();
         // Output is "<sysroot>\n".
         let sysroot = stdout.trim_end();
-        builder.verbose(|| eprintln!("`cargo miri setup --print-sysroot` said: {sysroot:?}"));
+        builder.verbose(|| println!("`cargo miri setup --print-sysroot` said: {sysroot:?}"));
         PathBuf::from(sysroot)
     }
 }
@@ -2488,7 +2488,7 @@ fn markdown_test(builder: &Builder<'_>, compiler: Compiler, markdown: &Path) ->
         }
     }
 
-    builder.verbose(|| eprintln!("doc tests for: {}", markdown.display()));
+    builder.verbose(|| println!("doc tests for: {}", markdown.display()));
     let mut cmd = builder.rustdoc_cmd(compiler);
     builder.add_rust_test_threads(&mut cmd);
     // allow for unstable options such as new editions
diff --git a/src/bootstrap/src/core/builder/cargo.rs b/src/bootstrap/src/core/builder/cargo.rs
index 226b7e2f232..6e848628e5c 100644
--- a/src/bootstrap/src/core/builder/cargo.rs
+++ b/src/bootstrap/src/core/builder/cargo.rs
@@ -523,7 +523,7 @@ impl Builder<'_> {
 
         let sysroot_str = sysroot.as_os_str().to_str().expect("sysroot should be UTF-8");
         if self.is_verbose() && !matches!(self.config.dry_run, DryRun::SelfCheck) {
-            eprintln!("using sysroot {sysroot_str}");
+            println!("using sysroot {sysroot_str}");
         }
 
         let mut rustflags = Rustflags::new(target);
diff --git a/src/bootstrap/src/core/builder/mod.rs b/src/bootstrap/src/core/builder/mod.rs
index ffe3e053e72..026c26479d3 100644
--- a/src/bootstrap/src/core/builder/mod.rs
+++ b/src/bootstrap/src/core/builder/mod.rs
@@ -392,14 +392,14 @@ impl StepDescription {
     fn is_excluded(&self, builder: &Builder<'_>, pathset: &PathSet) -> bool {
         if builder.config.skip.iter().any(|e| pathset.has(e, builder.kind)) {
             if !matches!(builder.config.dry_run, DryRun::SelfCheck) {
-                eprintln!("Skipping {pathset:?} because it is excluded");
+                println!("Skipping {pathset:?} because it is excluded");
             }
             return true;
         }
 
         if !builder.config.skip.is_empty() && !matches!(builder.config.dry_run, DryRun::SelfCheck) {
             builder.verbose(|| {
-                eprintln!(
+                println!(
                     "{:?} not skipped for {:?} -- not in {:?}",
                     pathset, self.name, builder.config.skip
                 )
@@ -1437,11 +1437,11 @@ impl<'a> Builder<'a> {
                 panic!("{}", out);
             }
             if let Some(out) = self.cache.get(&step) {
-                self.verbose_than(1, || eprintln!("{}c {:?}", "  ".repeat(stack.len()), step));
+                self.verbose_than(1, || println!("{}c {:?}", "  ".repeat(stack.len()), step));
 
                 return out;
             }
-            self.verbose_than(1, || eprintln!("{}> {:?}", "  ".repeat(stack.len()), step));
+            self.verbose_than(1, || println!("{}> {:?}", "  ".repeat(stack.len()), step));
             stack.push(Box::new(step.clone()));
         }
 
@@ -1462,7 +1462,7 @@ impl<'a> Builder<'a> {
             let step_string = format!("{step:?}");
             let brace_index = step_string.find('{').unwrap_or(0);
             let type_string = type_name::<S>();
-            eprintln!(
+            println!(
                 "[TIMING] {} {} -- {}.{:03}",
                 &type_string.strip_prefix("bootstrap::").unwrap_or(type_string),
                 &step_string[brace_index..],
@@ -1479,9 +1479,7 @@ impl<'a> Builder<'a> {
             let cur_step = stack.pop().expect("step stack empty");
             assert_eq!(cur_step.downcast_ref(), Some(&step));
         }
-        self.verbose_than(1, || {
-            eprintln!("{}< {:?}", "  ".repeat(self.stack.borrow().len()), step)
-        });
+        self.verbose_than(1, || println!("{}< {:?}", "  ".repeat(self.stack.borrow().len()), step));
         self.cache.put(step, out.clone());
         out
     }
diff --git a/src/bootstrap/src/core/config/config.rs b/src/bootstrap/src/core/config/config.rs
index 002b990bb52..c6800aedca9 100644
--- a/src/bootstrap/src/core/config/config.rs
+++ b/src/bootstrap/src/core/config/config.rs
@@ -1299,7 +1299,7 @@ impl Config {
                     .map(|change_id| change_id.inner.map(crate::find_recent_config_change_ids))
                 {
                     if !changes.is_empty() {
-                        eprintln!(
+                        println!(
                             "WARNING: There have been changes to x.py since you last updated:\n{}",
                             crate::human_readable_changes(&changes)
                         );
@@ -1565,7 +1565,7 @@ impl Config {
         }
 
         if cargo_clippy.is_some() && rustc.is_none() {
-            eprintln!(
+            println!(
                 "WARNING: Using `build.cargo-clippy` without `build.rustc` usually fails due to toolchain conflict."
             );
         }
@@ -1852,7 +1852,7 @@ impl Config {
 
             // FIXME: Remove this option at the end of 2024.
             if parallel_compiler.is_some() {
-                eprintln!(
+                println!(
                     "WARNING: The `rust.parallel-compiler` option is deprecated and does nothing. The parallel compiler (with one thread) is now the default"
                 );
             }
@@ -1884,7 +1884,7 @@ impl Config {
                         if available_backends.contains(&backend) {
                             panic!("Invalid value '{s}' for 'rust.codegen-backends'. Instead, please use '{backend}'.");
                         } else {
-                            eprintln!("HELP: '{s}' for 'rust.codegen-backends' might fail. \
+                            println!("HELP: '{s}' for 'rust.codegen-backends' might fail. \
                                 Codegen backends are mostly defined without the '{CODEGEN_BACKEND_PREFIX}' prefix. \
                                 In this case, it would be referred to as '{backend}'.");
                         }
@@ -1913,7 +1913,7 @@ impl Config {
         // tests may fail due to using a different channel than the one used by the compiler during tests.
         if let Some(commit) = &config.download_rustc_commit {
             if is_user_configured_rust_channel {
-                eprintln!(
+                println!(
                     "WARNING: `rust.download-rustc` is enabled. The `rust.channel` option will be overridden by the CI rustc's channel."
                 );
 
@@ -2003,10 +2003,10 @@ impl Config {
 
             if config.llvm_from_ci {
                 let warn = |option: &str| {
-                    eprintln!(
+                    println!(
                         "WARNING: `{option}` will only be used on `compiler/rustc_llvm` build, not for the LLVM build."
                     );
-                    eprintln!(
+                    println!(
                         "HELP: To use `{option}` for LLVM builds, set `download-ci-llvm` option to false."
                     );
                 };
@@ -2025,12 +2025,12 @@ impl Config {
                 // if they've chosen a different value.
 
                 if libzstd.is_some() {
-                    eprintln!(
+                    println!(
                         "WARNING: when using `download-ci-llvm`, the local `llvm.libzstd` option, \
                         like almost all `llvm.*` options, will be ignored and set by the LLVM CI \
                         artifacts builder config."
                     );
-                    eprintln!(
+                    println!(
                         "HELP: To use `llvm.libzstd` for LLVM/LLD builds, set `download-ci-llvm` option to false."
                     );
                 }
@@ -2099,7 +2099,7 @@ impl Config {
                             if available_backends.contains(&backend) {
                                 panic!("Invalid value '{s}' for 'target.{triple}.codegen-backends'. Instead, please use '{backend}'.");
                             } else {
-                                eprintln!("HELP: '{s}' for 'target.{triple}.codegen-backends' might fail. \
+                                println!("HELP: '{s}' for 'target.{triple}.codegen-backends' might fail. \
                                     Codegen backends are mostly defined without the '{CODEGEN_BACKEND_PREFIX}' prefix. \
                                     In this case, it would be referred to as '{backend}'.");
                             }
@@ -2315,7 +2315,7 @@ impl Config {
         if self.dry_run() {
             return Ok(());
         }
-        self.verbose(|| eprintln!("running: {cmd:?}"));
+        self.verbose(|| println!("running: {cmd:?}"));
         build_helper::util::try_run(cmd, self.is_verbose())
     }
 
@@ -2490,7 +2490,7 @@ impl Config {
                         // This happens when LLVM submodule is updated in CI, we should disable ci-rustc without an error
                         // to not break CI. For non-CI environments, we should return an error.
                         if CiEnv::is_ci() {
-                            eprintln!("WARNING: LLVM submodule has changes, `download-rustc` will be disabled.");
+                            println!("WARNING: LLVM submodule has changes, `download-rustc` will be disabled.");
                             return None;
                         } else {
                             panic!("ERROR: LLVM submodule has changes, `download-rustc` can't be used.");
@@ -2501,8 +2501,8 @@ impl Config {
                         let ci_config_toml = match self.get_builder_toml("ci-rustc") {
                             Ok(ci_config_toml) => ci_config_toml,
                             Err(e) if e.to_string().contains("unknown field") => {
-                                eprintln!("WARNING: CI rustc has some fields that are no longer supported in bootstrap; download-rustc will be disabled.");
-                                eprintln!("HELP: Consider rebasing to a newer commit if available.");
+                                println!("WARNING: CI rustc has some fields that are no longer supported in bootstrap; download-rustc will be disabled.");
+                                println!("HELP: Consider rebasing to a newer commit if available.");
                                 return None;
                             },
                             Err(e) => {
@@ -2527,7 +2527,7 @@ impl Config {
                             .is_some_and(|s| s == "1" || s == "true");
 
                         if disable_ci_rustc_if_incompatible && res.is_err() {
-                            eprintln!("WARNING: download-rustc is disabled with `DISABLE_CI_RUSTC_IF_INCOMPATIBLE` env.");
+                            println!("WARNING: download-rustc is disabled with `DISABLE_CI_RUSTC_IF_INCOMPATIBLE` env.");
                             return None;
                         }
 
@@ -2712,7 +2712,7 @@ impl Config {
             return;
         }
 
-        eprintln!("Updating submodule {relative_path}");
+        println!("Updating submodule {relative_path}");
         self.check_run(
             helpers::git(Some(&self.src))
                 .run_always()
@@ -2835,7 +2835,7 @@ impl Config {
             Some(StringOrBool::Bool(true)) => false,
             Some(StringOrBool::String(s)) if s == "if-unchanged" => {
                 if !self.rust_info.is_managed_git_subrepository() {
-                    eprintln!(
+                    println!(
                         "ERROR: `download-rustc=if-unchanged` is only compatible with Git managed sources."
                     );
                     crate::exit!(1);
@@ -2868,10 +2868,10 @@ impl Config {
                 if if_unchanged {
                     return None;
                 }
-                eprintln!("ERROR: could not find commit hash for downloading rustc");
-                eprintln!("HELP: maybe your repository history is too shallow?");
-                eprintln!("HELP: consider setting `rust.download-rustc=false` in config.toml");
-                eprintln!("HELP: or fetch enough history to include one upstream commit");
+                println!("ERROR: could not find commit hash for downloading rustc");
+                println!("HELP: maybe your repository history is too shallow?");
+                println!("HELP: consider setting `rust.download-rustc=false` in config.toml");
+                println!("HELP: or fetch enough history to include one upstream commit");
                 crate::exit!(1);
             }
         };
@@ -2910,7 +2910,7 @@ impl Config {
         let if_unchanged = || {
             if self.rust_info.is_from_tarball() {
                 // Git is needed for running "if-unchanged" logic.
-                eprintln!(
+                println!(
                     "WARNING: 'if-unchanged' has no effect on tarball sources; ignoring `download-ci-llvm`."
                 );
                 return false;
@@ -2959,10 +2959,10 @@ impl Config {
         // Only commits merged by bors will have CI artifacts.
         let commit = get_closest_merge_commit(Some(&self.src), &self.git_config(), &[]).unwrap();
         if commit.is_empty() {
-            eprintln!("error: could not find commit hash for downloading components from CI");
-            eprintln!("help: maybe your repository history is too shallow?");
-            eprintln!("help: consider disabling `{option_name}`");
-            eprintln!("help: or fetch enough history to include one upstream commit");
+            println!("error: could not find commit hash for downloading components from CI");
+            println!("help: maybe your repository history is too shallow?");
+            println!("help: consider disabling `{option_name}`");
+            println!("help: or fetch enough history to include one upstream commit");
             crate::exit!(1);
         }
 
@@ -2974,14 +2974,14 @@ impl Config {
         if has_changes {
             if if_unchanged {
                 if self.is_verbose() {
-                    eprintln!(
+                    println!(
                         "warning: saw changes to one of {modified_paths:?} since {commit}; \
                             ignoring `{option_name}`"
                     );
                 }
                 return None;
             }
-            eprintln!(
+            println!(
                 "warning: `{option_name}` is enabled, but there are changes to one of {modified_paths:?}"
             );
         }
@@ -3018,7 +3018,7 @@ pub(crate) fn check_incompatible_options_for_ci_llvm(
         ($current:expr, $expected:expr) => {
             if let Some(current) = &$current {
                 if Some(current) != $expected.as_ref() {
-                    eprintln!(
+                    println!(
                         "WARNING: `llvm.{}` has no effect with `llvm.download-ci-llvm`. \
                         Current value: {:?}, Expected value(s): {}{:?}",
                         stringify!($expected).replace("_", "-"),
@@ -3123,7 +3123,7 @@ fn check_incompatible_options_for_ci_rustc(
         ($current:expr, $expected:expr, $config_section:expr) => {
             if let Some(current) = &$current {
                 if Some(current) != $expected.as_ref() {
-                    eprintln!(
+                    println!(
                         "WARNING: `{}` has no effect with `rust.download-rustc`. \
                         Current value: {:?}, Expected value(s): {}{:?}",
                         format!("{}.{}", $config_section, stringify!($expected).replace("_", "-")),
diff --git a/src/bootstrap/src/core/config/flags.rs b/src/bootstrap/src/core/config/flags.rs
index 66b9f5ed84e..bfeb811508c 100644
--- a/src/bootstrap/src/core/config/flags.rs
+++ b/src/bootstrap/src/core/config/flags.rs
@@ -196,12 +196,12 @@ impl Flags {
         if let Ok(HelpVerboseOnly { help: true, verbose: 1.., cmd: subcommand }) =
             HelpVerboseOnly::try_parse_from(normalize_args(args))
         {
-            eprintln!("NOTE: updating submodules before printing available paths");
+            println!("NOTE: updating submodules before printing available paths");
             let config = Config::parse(Self::parse(&[String::from("build")]));
             let build = Build::new(config);
             let paths = Builder::get_help(&build, subcommand);
             if let Some(s) = paths {
-                eprintln!("{s}");
+                println!("{s}");
             } else {
                 panic!("No paths available for subcommand `{}`", subcommand.as_str());
             }
diff --git a/src/bootstrap/src/core/download.rs b/src/bootstrap/src/core/download.rs
index 05b91c518cf..db35e6907e6 100644
--- a/src/bootstrap/src/core/download.rs
+++ b/src/bootstrap/src/core/download.rs
@@ -77,7 +77,7 @@ impl Config {
         if self.dry_run() && !cmd.run_always {
             return true;
         }
-        self.verbose(|| eprintln!("running: {cmd:?}"));
+        self.verbose(|| println!("running: {cmd:?}"));
         check_run(cmd, self.is_verbose())
     }
 
@@ -144,7 +144,7 @@ impl Config {
     /// Please see <https://nixos.org/patchelf.html> for more information
     fn fix_bin_or_dylib(&self, fname: &Path) {
         assert_eq!(SHOULD_FIX_BINS_AND_DYLIBS.get(), Some(&true));
-        eprintln!("attempting to patch {}", fname.display());
+        println!("attempting to patch {}", fname.display());
 
         // Only build `.nix-deps` once.
         static NIX_DEPS_DIR: OnceLock<PathBuf> = OnceLock::new();
@@ -206,7 +206,7 @@ impl Config {
     }
 
     fn download_file(&self, url: &str, dest_path: &Path, help_on_error: &str) {
-        self.verbose(|| eprintln!("download {url}"));
+        self.verbose(|| println!("download {url}"));
         // Use a temporary file in case we crash while downloading, to avoid a corrupt download in cache/.
         let tempfile = self.tempdir().join(dest_path.file_name().unwrap());
         // While bootstrap itself only supports http and https downloads, downstream forks might
@@ -226,7 +226,7 @@ impl Config {
     }
 
     fn download_http_with_retries(&self, tempfile: &Path, url: &str, help_on_error: &str) {
-        eprintln!("downloading {url}");
+        println!("downloading {url}");
         // Try curl. If that fails and we are on windows, fallback to PowerShell.
         // options should be kept in sync with
         // src/bootstrap/src/core/download.rs
@@ -341,7 +341,7 @@ impl Config {
             short_path = short_path.strip_prefix(pattern).unwrap_or(short_path);
             let dst_path = dst.join(short_path);
             self.verbose(|| {
-                eprintln!("extracting {} to {}", original_path.display(), dst.display())
+                println!("extracting {} to {}", original_path.display(), dst.display())
             });
             if !t!(member.unpack_in(dst)) {
                 panic!("path traversal attack ??");
@@ -365,7 +365,7 @@ impl Config {
     pub(crate) fn verify(&self, path: &Path, expected: &str) -> bool {
         use sha2::Digest;
 
-        self.verbose(|| eprintln!("verifying {}", path.display()));
+        self.verbose(|| println!("verifying {}", path.display()));
 
         if self.dry_run() {
             return false;
@@ -391,7 +391,7 @@ impl Config {
         let verified = checksum == expected;
 
         if !verified {
-            eprintln!(
+            println!(
                 "invalid checksum: \n\
                 found:    {checksum}\n\
                 expected: {expected}",
@@ -421,7 +421,7 @@ enum DownloadSource {
 /// Functions that are only ever called once, but named for clarify and to avoid thousand-line functions.
 impl Config {
     pub(crate) fn download_clippy(&self) -> PathBuf {
-        self.verbose(|| eprintln!("downloading stage0 clippy artifacts"));
+        self.verbose(|| println!("downloading stage0 clippy artifacts"));
 
         let date = &self.stage0_metadata.compiler.date;
         let version = &self.stage0_metadata.compiler.version;
@@ -518,7 +518,7 @@ impl Config {
     }
 
     pub(crate) fn download_ci_rustc(&self, commit: &str) {
-        self.verbose(|| eprintln!("using downloaded stage2 artifacts from CI (commit {commit})"));
+        self.verbose(|| println!("using downloaded stage2 artifacts from CI (commit {commit})"));
 
         let version = self.artifact_version_part(commit);
         // download-rustc doesn't need its own cargo, it can just use beta's. But it does need the
@@ -539,7 +539,7 @@ impl Config {
 
     #[cfg(not(feature = "bootstrap-self-test"))]
     pub(crate) fn download_beta_toolchain(&self) {
-        self.verbose(|| eprintln!("downloading stage0 beta artifacts"));
+        self.verbose(|| println!("downloading stage0 beta artifacts"));
 
         let date = &self.stage0_metadata.compiler.date;
         let version = &self.stage0_metadata.compiler.version;
@@ -677,7 +677,7 @@ impl Config {
                     return;
                 } else {
                     self.verbose(|| {
-                        eprintln!(
+                        println!(
                             "ignoring cached file {} due to failed verification",
                             tarball.display()
                         )
@@ -776,10 +776,10 @@ download-rustc = false
                     t!(check_incompatible_options_for_ci_llvm(current_config_toml, ci_config_toml));
                 }
                 Err(e) if e.to_string().contains("unknown field") => {
-                    eprintln!(
+                    println!(
                         "WARNING: CI LLVM has some fields that are no longer supported in bootstrap; download-ci-llvm will be disabled."
                     );
-                    eprintln!("HELP: Consider rebasing to a newer commit if available.");
+                    println!("HELP: Consider rebasing to a newer commit if available.");
                 }
                 Err(e) => {
                     eprintln!("ERROR: Failed to parse CI LLVM config.toml: {e}");
diff --git a/src/bootstrap/src/core/sanity.rs b/src/bootstrap/src/core/sanity.rs
index 71e7f40f032..dcf68cbeeda 100644
--- a/src/bootstrap/src/core/sanity.rs
+++ b/src/bootstrap/src/core/sanity.rs
@@ -237,11 +237,11 @@ than building it.
                 stage0_supported_target_list.intersection(&missing_targets_hashset).collect();
 
             if !duplicated_targets.is_empty() {
-                eprintln!(
+                println!(
                     "Following targets supported from the stage0 compiler, please remove them from STAGE0_MISSING_TARGETS list."
                 );
                 for duplicated_target in duplicated_targets {
-                    eprintln!("  {duplicated_target}");
+                    println!("  {duplicated_target}");
                 }
                 std::process::exit(1);
             }
diff --git a/src/bootstrap/src/lib.rs b/src/bootstrap/src/lib.rs
index 5f778223d7d..0ecf61ffcd9 100644
--- a/src/bootstrap/src/lib.rs
+++ b/src/bootstrap/src/lib.rs
@@ -406,11 +406,11 @@ impl Build {
             .unwrap()
             .trim();
         if local_release.split('.').take(2).eq(version.split('.').take(2)) {
-            build.verbose(|| eprintln!("auto-detected local-rebuild {local_release}"));
+            build.verbose(|| println!("auto-detected local-rebuild {local_release}"));
             build.local_rebuild = true;
         }
 
-        build.verbose(|| eprintln!("finding compilers"));
+        build.verbose(|| println!("finding compilers"));
         utils::cc_detect::find(&build);
         // When running `setup`, the profile is about to change, so any requirements we have now may
         // be different on the next invocation. Don't check for them until the next time x.py is
@@ -418,7 +418,7 @@ impl Build {
         //
         // Similarly, for `setup` we don't actually need submodules or cargo metadata.
         if !matches!(build.config.cmd, Subcommand::Setup { .. }) {
-            build.verbose(|| eprintln!("running sanity check"));
+            build.verbose(|| println!("running sanity check"));
             crate::core::sanity::check(&mut build);
 
             // Make sure we update these before gathering metadata so we don't get an error about missing
@@ -436,7 +436,7 @@ impl Build {
             // Now, update all existing submodules.
             build.update_existing_submodules();
 
-            build.verbose(|| eprintln!("learning about cargo"));
+            build.verbose(|| println!("learning about cargo"));
             crate::core::metadata::build(&mut build);
         }
 
@@ -605,7 +605,7 @@ impl Build {
         let stamp = dir.join(".stamp");
         let mut cleared = false;
         if mtime(&stamp) < mtime(input) {
-            self.verbose(|| eprintln!("Dirty - {}", dir.display()));
+            self.verbose(|| println!("Dirty - {}", dir.display()));
             let _ = fs::remove_dir_all(dir);
             cleared = true;
         } else if stamp.exists() {
@@ -890,7 +890,7 @@ impl Build {
         let executed_at = std::panic::Location::caller();
 
         self.verbose(|| {
-            eprintln!("running: {command:?} (created at {created_at}, executed at {executed_at})")
+            println!("running: {command:?} (created at {created_at}, executed at {executed_at})")
         });
 
         let cmd = command.as_command_mut();
@@ -947,7 +947,7 @@ Executed at: {executed_at}"#,
 
         let fail = |message: &str, output: CommandOutput| -> ! {
             if self.is_verbose() {
-                eprintln!("{message}");
+                println!("{message}");
             } else {
                 let (stdout, stderr) = (output.stdout_if_present(), output.stderr_if_present());
                 // If the command captures output, the user would not see any indication that
@@ -957,16 +957,16 @@ Executed at: {executed_at}"#,
                     if let Some(stdout) =
                         output.stdout_if_present().take_if(|s| !s.trim().is_empty())
                     {
-                        eprintln!("STDOUT:\n{stdout}\n");
+                        println!("STDOUT:\n{stdout}\n");
                     }
                     if let Some(stderr) =
                         output.stderr_if_present().take_if(|s| !s.trim().is_empty())
                     {
-                        eprintln!("STDERR:\n{stderr}\n");
+                        println!("STDERR:\n{stderr}\n");
                     }
-                    eprintln!("Command {command:?} has failed. Rerun with -v to see more details.");
+                    println!("Command {command:?} has failed. Rerun with -v to see more details.");
                 } else {
-                    eprintln!("Command has failed. Rerun with -v to see more details.");
+                    println!("Command has failed. Rerun with -v to see more details.");
                 }
             }
             exit!(1);
@@ -1011,7 +1011,7 @@ Executed at: {executed_at}"#,
         match self.config.dry_run {
             DryRun::SelfCheck => (),
             DryRun::Disabled | DryRun::UserSelected => {
-                eprintln!("{msg}");
+                println!("{msg}");
             }
         }
     }
@@ -1666,7 +1666,7 @@ Executed at: {executed_at}"#,
         if self.config.dry_run() {
             return;
         }
-        self.verbose_than(1, || eprintln!("Copy/Link {src:?} to {dst:?}"));
+        self.verbose_than(1, || println!("Copy/Link {src:?} to {dst:?}"));
         if src == dst {
             return;
         }
@@ -1775,7 +1775,7 @@ Executed at: {executed_at}"#,
             return;
         }
         let dst = dstdir.join(src.file_name().unwrap());
-        self.verbose_than(1, || eprintln!("Install {src:?} to {dst:?}"));
+        self.verbose_than(1, || println!("Install {src:?} to {dst:?}"));
         t!(fs::create_dir_all(dstdir));
         if !src.exists() {
             panic!("ERROR: File \"{}\" not found!", src.display());
diff --git a/src/bootstrap/src/utils/cc_detect.rs b/src/bootstrap/src/utils/cc_detect.rs
index e8d5b60948a..0df00469452 100644
--- a/src/bootstrap/src/utils/cc_detect.rs
+++ b/src/bootstrap/src/utils/cc_detect.rs
@@ -155,15 +155,15 @@ pub fn find_target(build: &Build, target: TargetSelection) {
         build.cxx.borrow_mut().insert(target, compiler);
     }
 
-    build.verbose(|| eprintln!("CC_{} = {:?}", target.triple, build.cc(target)));
-    build.verbose(|| eprintln!("CFLAGS_{} = {cflags:?}", target.triple));
+    build.verbose(|| println!("CC_{} = {:?}", target.triple, build.cc(target)));
+    build.verbose(|| println!("CFLAGS_{} = {cflags:?}", target.triple));
     if let Ok(cxx) = build.cxx(target) {
         let cxxflags = build.cflags(target, GitRepo::Rustc, CLang::Cxx);
-        build.verbose(|| eprintln!("CXX_{} = {cxx:?}", target.triple));
-        build.verbose(|| eprintln!("CXXFLAGS_{} = {cxxflags:?}", target.triple));
+        build.verbose(|| println!("CXX_{} = {cxx:?}", target.triple));
+        build.verbose(|| println!("CXXFLAGS_{} = {cxxflags:?}", target.triple));
     }
     if let Some(ar) = ar {
-        build.verbose(|| eprintln!("AR_{} = {ar:?}", target.triple));
+        build.verbose(|| println!("AR_{} = {ar:?}", target.triple));
         build.ar.borrow_mut().insert(target, ar);
     }
 
diff --git a/src/bootstrap/src/utils/helpers.rs b/src/bootstrap/src/utils/helpers.rs
index c0d52fd3430..923cc2dfc28 100644
--- a/src/bootstrap/src/utils/helpers.rs
+++ b/src/bootstrap/src/utils/helpers.rs
@@ -135,7 +135,7 @@ impl Drop for TimeIt {
     fn drop(&mut self) {
         let time = self.1.elapsed();
         if !self.0 {
-            eprintln!("\tfinished in {}.{:03} seconds", time.as_secs(), time.subsec_millis());
+            println!("\tfinished in {}.{:03} seconds", time.as_secs(), time.subsec_millis());
         }
     }
 }
@@ -267,12 +267,12 @@ pub fn check_run(cmd: &mut BootstrapCommand, print_cmd_on_fail: bool) -> bool {
     let status = match cmd.as_command_mut().status() {
         Ok(status) => status,
         Err(e) => {
-            eprintln!("failed to execute command: {cmd:?}\nERROR: {e}");
+            println!("failed to execute command: {cmd:?}\nERROR: {e}");
             return false;
         }
     };
     if !status.success() && print_cmd_on_fail {
-        eprintln!(
+        println!(
             "\n\ncommand did not execute successfully: {cmd:?}\n\
              expected success, got: {status}\n\n"
         );
diff --git a/src/bootstrap/src/utils/metrics.rs b/src/bootstrap/src/utils/metrics.rs
index 06d3add6281..b51fd490535 100644
--- a/src/bootstrap/src/utils/metrics.rs
+++ b/src/bootstrap/src/utils/metrics.rs
@@ -185,7 +185,7 @@ impl BuildMetrics {
                 if version.format_version == CURRENT_FORMAT_VERSION {
                     t!(serde_json::from_slice::<JsonRoot>(&contents)).invocations
                 } else {
-                    eprintln!(
+                    println!(
                         "WARNING: overriding existing build/metrics.json, as it's not \
                          compatible with build metrics format version {CURRENT_FORMAT_VERSION}."
                     );
diff --git a/src/bootstrap/src/utils/render_tests.rs b/src/bootstrap/src/utils/render_tests.rs
index 7a3ec61c6da..eb2c8254dc0 100644
--- a/src/bootstrap/src/utils/render_tests.rs
+++ b/src/bootstrap/src/utils/render_tests.rs
@@ -56,7 +56,7 @@ fn run_tests(builder: &Builder<'_>, cmd: &mut BootstrapCommand, stream: bool) ->
     let cmd = cmd.as_command_mut();
     cmd.stdout(Stdio::piped());
 
-    builder.verbose(|| eprintln!("running: {cmd:?}"));
+    builder.verbose(|| println!("running: {cmd:?}"));
 
     let mut process = cmd.spawn().unwrap();
 
@@ -71,7 +71,7 @@ fn run_tests(builder: &Builder<'_>, cmd: &mut BootstrapCommand, stream: bool) ->
 
     let result = process.wait_with_output().unwrap();
     if !result.status.success() && builder.is_verbose() {
-        eprintln!(
+        println!(
             "\n\ncommand did not execute successfully: {cmd:?}\n\
              expected success, got: {}",
             result.status
@@ -135,9 +135,7 @@ impl<'a> Renderer<'a> {
         if self.up_to_date_tests > 0 {
             let n = self.up_to_date_tests;
             let s = if n > 1 { "s" } else { "" };
-            eprintln!(
-                "help: ignored {n} up-to-date test{s}; use `--force-rerun` to prevent this\n"
-            );
+            println!("help: ignored {n} up-to-date test{s}; use `--force-rerun` to prevent this\n");
         }
     }
 
@@ -187,12 +185,12 @@ impl<'a> Renderer<'a> {
     }
 
     fn render_test_outcome_verbose(&self, outcome: Outcome<'_>, test: &TestOutcome) {
-        eprint!("test {} ... ", test.name);
-        self.builder.colored_stderr(|stdout| outcome.write_long(stdout)).unwrap();
+        print!("test {} ... ", test.name);
+        self.builder.colored_stdout(|stdout| outcome.write_long(stdout)).unwrap();
         if let Some(exec_time) = test.exec_time {
-            eprint!(" ({exec_time:.2?})");
+            print!(" ({exec_time:.2?})");
         }
-        eprintln!();
+        println!();
     }
 
     fn render_test_outcome_terse(&mut self, outcome: Outcome<'_>, test: &TestOutcome) {
@@ -200,45 +198,45 @@ impl<'a> Renderer<'a> {
             if let Some(total) = self.tests_count {
                 let total = total.to_string();
                 let executed = format!("{:>width$}", self.executed_tests - 1, width = total.len());
-                eprint!(" {executed}/{total}");
+                print!(" {executed}/{total}");
             }
-            eprintln!();
+            println!();
             self.terse_tests_in_line = 0;
         }
 
         self.terse_tests_in_line += 1;
-        self.builder.colored_stderr(|stdout| outcome.write_short(stdout, &test.name)).unwrap();
+        self.builder.colored_stdout(|stdout| outcome.write_short(stdout, &test.name)).unwrap();
         let _ = std::io::stdout().flush();
     }
 
     fn render_suite_outcome(&self, outcome: Outcome<'_>, suite: &SuiteOutcome) {
         // The terse output doesn't end with a newline, so we need to add it ourselves.
         if !self.builder.config.verbose_tests {
-            eprintln!();
+            println!();
         }
 
         if !self.failures.is_empty() {
-            eprintln!("\nfailures:\n");
+            println!("\nfailures:\n");
             for failure in &self.failures {
                 if failure.stdout.is_some() || failure.message.is_some() {
-                    eprintln!("---- {} stdout ----", failure.name);
+                    println!("---- {} stdout ----", failure.name);
                     if let Some(stdout) = &failure.stdout {
-                        eprintln!("{stdout}");
+                        println!("{stdout}");
                     }
                     if let Some(message) = &failure.message {
-                        eprintln!("NOTE: {message}");
+                        println!("NOTE: {message}");
                     }
                 }
             }
 
-            eprintln!("\nfailures:");
+            println!("\nfailures:");
             for failure in &self.failures {
-                eprintln!("    {}", failure.name);
+                println!("    {}", failure.name);
             }
         }
 
         if !self.benches.is_empty() {
-            eprintln!("\nbenchmarks:");
+            println!("\nbenchmarks:");
 
             let mut rows = Vec::new();
             for bench in &self.benches {
@@ -253,13 +251,13 @@ impl<'a> Renderer<'a> {
             let max_1 = rows.iter().map(|r| r.1.len()).max().unwrap_or(0);
             let max_2 = rows.iter().map(|r| r.2.len()).max().unwrap_or(0);
             for row in &rows {
-                eprintln!("    {:<max_0$} {:>max_1$} {:>max_2$}", row.0, row.1, row.2);
+                println!("    {:<max_0$} {:>max_1$} {:>max_2$}", row.0, row.1, row.2);
             }
         }
 
-        eprint!("\ntest result: ");
-        self.builder.colored_stderr(|stdout| outcome.write_long(stdout)).unwrap();
-        eprintln!(
+        print!("\ntest result: ");
+        self.builder.colored_stdout(|stdout| outcome.write_long(stdout)).unwrap();
+        println!(
             ". {} passed; {} failed; {} ignored; {} measured; {} filtered out{time}\n",
             suite.passed,
             suite.failed,
@@ -276,7 +274,7 @@ impl<'a> Renderer<'a> {
     fn render_message(&mut self, message: Message) {
         match message {
             Message::Suite(SuiteMessage::Started { test_count }) => {
-                eprintln!("\nrunning {test_count} tests");
+                println!("\nrunning {test_count} tests");
                 self.executed_tests = 0;
                 self.terse_tests_in_line = 0;
                 self.tests_count = Some(test_count);
@@ -316,7 +314,7 @@ impl<'a> Renderer<'a> {
                 self.failures.push(outcome);
             }
             Message::Test(TestMessage::Timeout { name }) => {
-                eprintln!("test {name} has been running for a long time");
+                println!("test {name} has been running for a long time");
             }
             Message::Test(TestMessage::Started) => {} // Not useful
         }
diff --git a/src/bootstrap/src/utils/tarball.rs b/src/bootstrap/src/utils/tarball.rs
index f60498a4872..3c6c7a7fa18 100644
--- a/src/bootstrap/src/utils/tarball.rs
+++ b/src/bootstrap/src/utils/tarball.rs
@@ -344,7 +344,7 @@ impl<'a> Tarball<'a> {
         // For `x install` tarball files aren't needed, so we can speed up the process by not producing them.
         let compression_profile = if self.builder.kind == Kind::Install {
             self.builder.verbose(|| {
-                eprintln!("Forcing dist.compression-profile = 'no-op' for `x install`.")
+                println!("Forcing dist.compression-profile = 'no-op' for `x install`.")
             });
             // "no-op" indicates that the rust-installer won't produce compressed tarball sources.
             "no-op"