Auto merge of #84956 - RalfJung:rollup-m70mx2n, r=RalfJung

Rollup of 11 pull requests

Successful merges:

 - #83553 (Update `ptr` docs with regards to `ptr::addr_of!`)
 - #84183 (Update RELEASES.md for 1.52.0)
 - #84709 (Add doc alias for `chdir` to `std::env::set_current_dir`)
 - #84803 (Reduce duplication in `impl_dep_tracking_hash` macros)
 - #84808 (Account for unsatisfied bounds in E0599)
 - #84843 (use else if in std library )
 - #84865 (rustbuild: Pass a `threads` flag that works to windows-gnu lld)
 - #84878 (Clarify documentation for `[T]::contains`)
 - #84882 (platform-support: Center the contents of the `std` and `host` columns)
 - #84903 (Remove `rustc_middle::mir::interpret::CheckInAllocMsg::NullPointerTest`)
 - #84913 (Do not ICE on invalid const param)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup

6 files changed, 77 insertions, 12 deletions

diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index de9c1882c7d..db443756de3 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -1110,6 +1110,19 @@ struct Compiletest {
     compare_mode: Option<&'static str>,
 }
 
+impl Compiletest {
+    fn add_lld_flags(builder: &Builder<'_>, target: TargetSelection, flags: &mut Vec<String>) {
+        if builder.config.use_lld {
+            if builder.is_fuse_ld_lld(target) {
+                flags.push("-Clink-arg=-fuse-ld=lld".to_string());
+            }
+
+            let threads = if target.contains("windows") { "/threads:1" } else { "--threads=1" };
+            flags.push(format!("-Clink-arg=-Wl,{}", threads));
+        }
+    }
+}
+
 impl Step for Compiletest {
     type Output = ();
 
@@ -1250,18 +1263,12 @@ note: if you're sure you want to do this, please open an issue as to why. In the
 
         let mut hostflags = flags.clone();
         hostflags.push(format!("-Lnative={}", builder.test_helpers_out(compiler.host).display()));
-        if builder.is_fuse_ld_lld(compiler.host) {
-            hostflags.push("-Clink-args=-fuse-ld=lld".to_string());
-            hostflags.push("-Clink-arg=-Wl,--threads=1".to_string());
-        }
+        Self::add_lld_flags(builder, compiler.host, &mut hostflags);
         cmd.arg("--host-rustcflags").arg(hostflags.join(" "));
 
         let mut targetflags = flags;
         targetflags.push(format!("-Lnative={}", builder.test_helpers_out(target).display()));
-        if builder.is_fuse_ld_lld(target) {
-            targetflags.push("-Clink-args=-fuse-ld=lld".to_string());
-            targetflags.push("-Clink-arg=-Wl,--threads=1".to_string());
-        }
+        Self::add_lld_flags(builder, target, &mut targetflags);
         cmd.arg("--target-rustcflags").arg(targetflags.join(" "));
 
         cmd.arg("--docck-python").arg(builder.python());
diff --git a/src/doc/rustc/src/platform-support.md b/src/doc/rustc/src/platform-support.md
index b3c67b84da6..f9a7599c497 100644
--- a/src/doc/rustc/src/platform-support.md
+++ b/src/doc/rustc/src/platform-support.md
@@ -113,7 +113,7 @@ The `std` column in the table below has the following meanings:
 [`no_std`]: https://rust-embedded.github.io/book/intro/no-std.html
 
 target | std | notes
--------|-----|-------
+-------|:---:|-------
 `aarch64-apple-ios` | ✓ | ARM64 iOS
 `aarch64-fuchsia` | ✓ | ARM64 Fuchsia
 `aarch64-linux-android` | ✓ | ARM64 Android
@@ -194,7 +194,7 @@ The `host` column indicates whether the codebase includes support for building
 host tools.
 
 target | std | host | notes
--------|-----|------|-------
+-------|:---:|:----:|-------
 `aarch64-apple-ios-macabi` | ? |  | Apple Catalyst on ARM64
 `aarch64-apple-ios-sim` | ? |  | Apple iOS Simulator on ARM64
 `aarch64-apple-tvos` | * |  | ARM64 tvOS
diff --git a/src/test/ui/suggestions/import-trait-for-method-call.rs b/src/test/ui/suggestions/import-trait-for-method-call.rs
index 646f68dea14..4dbadbdf982 100644
--- a/src/test/ui/suggestions/import-trait-for-method-call.rs
+++ b/src/test/ui/suggestions/import-trait-for-method-call.rs
@@ -6,4 +6,11 @@ fn next_u64() -> u64 {
     h.finish() //~ ERROR no method named `finish` found for struct `DefaultHasher`
 }
 
-fn main() {}
+trait Bar {}
+impl Bar for String {}
+
+fn main() {
+    let s = String::from("hey");
+    let x: &dyn Bar = &s;
+    x.as_ref(); //~ ERROR the method `as_ref` exists for reference `&dyn Bar`, but its trait bounds
+}
diff --git a/src/test/ui/suggestions/import-trait-for-method-call.stderr b/src/test/ui/suggestions/import-trait-for-method-call.stderr
index f3ae20552f3..a2b9b9d14ab 100644
--- a/src/test/ui/suggestions/import-trait-for-method-call.stderr
+++ b/src/test/ui/suggestions/import-trait-for-method-call.stderr
@@ -15,6 +15,22 @@ help: the following trait is implemented but not in scope; perhaps add a `use` f
 LL | use std::hash::Hasher;
    |
 
-error: aborting due to previous error
+error[E0599]: the method `as_ref` exists for reference `&dyn Bar`, but its trait bounds were not satisfied
+  --> $DIR/import-trait-for-method-call.rs:15:7
+   |
+LL | trait Bar {}
+   | --------- doesn't satisfy `dyn Bar: AsRef<_>`
+...
+LL |     x.as_ref();
+   |       ^^^^^^ method cannot be called on `&dyn Bar` due to unsatisfied trait bounds
+   |
+   = note: the following trait bounds were not satisfied:
+           `dyn Bar: AsRef<_>`
+           which is required by `&dyn Bar: AsRef<_>`
+   = help: items from traits can only be used if the trait is implemented and in scope
+   = note: the following trait defines an item `as_ref`, perhaps you need to implement it:
+           candidate #1: `AsRef`
+
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0599`.
diff --git a/src/test/ui/typeck/issue-84831.rs b/src/test/ui/typeck/issue-84831.rs
new file mode 100644
index 00000000000..c646f710725
--- /dev/null
+++ b/src/test/ui/typeck/issue-84831.rs
@@ -0,0 +1,9 @@
+fn f() {
+    std::<0>; //~ ERROR expected value
+}
+fn j() {
+    std::<_ as _>; //~ ERROR expected value
+    //~^ ERROR expected one of `,` or `>`, found keyword `as`
+}
+
+fn main () {}
diff --git a/src/test/ui/typeck/issue-84831.stderr b/src/test/ui/typeck/issue-84831.stderr
new file mode 100644
index 00000000000..e3cce10a00f
--- /dev/null
+++ b/src/test/ui/typeck/issue-84831.stderr
@@ -0,0 +1,26 @@
+error: expected one of `,` or `>`, found keyword `as`
+  --> $DIR/issue-84831.rs:5:13
+   |
+LL |     std::<_ as _>;
+   |             ^^ expected one of `,` or `>`
+   |
+help: expressions must be enclosed in braces to be used as const generic arguments
+   |
+LL |     std::<{ _ as _ }>;
+   |           ^        ^
+
+error[E0423]: expected value, found crate `std`
+  --> $DIR/issue-84831.rs:2:5
+   |
+LL |     std::<0>;
+   |     ^^^^^^^^ not a value
+
+error[E0423]: expected value, found crate `std`
+  --> $DIR/issue-84831.rs:5:5
+   |
+LL |     std::<_ as _>;
+   |     ^^^^^^^^^^^^^ not a value
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0423`.