2 files changed, 23 insertions, 8 deletions
diff --git a/src/bootstrap/src/core/build_steps/test.rs b/src/bootstrap/src/core/build_steps/test.rs
index 0d3ab6ad97d..505a6ef3e34 100644
--- a/src/bootstrap/src/core/build_steps/test.rs
+++ b/src/bootstrap/src/core/build_steps/test.rs
@@ -86,6 +86,7 @@ impl Step for CrateBootstrap {
             SourceType::InTree,
             &[],
         );
+
         let crate_name = path.rsplit_once('/').unwrap().1;
         run_cargo_test(cargo, &[], &[], crate_name, crate_name, bootstrap_host, builder);
     }
@@ -3099,6 +3100,8 @@ impl Step for Bootstrap {
             &[],
         );
 
+        cargo.release_build(false);
+
         cargo
             .rustflag("-Cdebuginfo=2")
             .env("CARGO_TARGET_DIR", builder.out.join("bootstrap"))
diff --git a/src/bootstrap/src/core/builder/cargo.rs b/src/bootstrap/src/core/builder/cargo.rs
index 6b792108784..4059aa6bcd2 100644
--- a/src/bootstrap/src/core/builder/cargo.rs
+++ b/src/bootstrap/src/core/builder/cargo.rs
@@ -88,12 +88,14 @@ impl HostFlags {
 #[derive(Debug)]
 pub struct Cargo {
     command: BootstrapCommand,
+    args: Vec<OsString>,
     compiler: Compiler,
     target: TargetSelection,
     rustflags: Rustflags,
     rustdocflags: Rustflags,
     hostflags: HostFlags,
     allow_features: String,
+    release_build: bool,
 }
 
 impl Cargo {
@@ -121,6 +123,10 @@ impl Cargo {
         cargo
     }
 
+    pub fn release_build(&mut self, release_build: bool) {
+        self.release_build = release_build;
+    }
+
     pub fn compiler(&self) -> Compiler {
         self.compiler
     }
@@ -153,7 +159,7 @@ impl Cargo {
     }
 
     pub fn arg(&mut self, arg: impl AsRef<OsStr>) -> &mut Cargo {
-        self.command.arg(arg.as_ref());
+        self.args.push(arg.as_ref().into());
         self
     }
 
@@ -335,6 +341,12 @@ impl Cargo {
 
 impl From<Cargo> for BootstrapCommand {
     fn from(mut cargo: Cargo) -> BootstrapCommand {
+        if cargo.release_build {
+            cargo.args.insert(0, "--release".into());
+        }
+
+        cargo.command.args(cargo.args);
+
         let rustflags = &cargo.rustflags.0;
         if !rustflags.is_empty() {
             cargo.command.env("RUSTFLAGS", rustflags);
@@ -353,6 +365,7 @@ impl From<Cargo> for BootstrapCommand {
         if !cargo.allow_features.is_empty() {
             cargo.command.env("RUSTC_ALLOW_FEATURES", cargo.allow_features);
         }
+
         cargo.command
     }
 }
@@ -422,13 +435,6 @@ impl Builder<'_> {
             assert_eq!(target, compiler.host);
         }
 
-        if self.config.rust_optimize.is_release() &&
-        // cargo bench/install do not accept `--release` and miri doesn't want it
-        !matches!(cmd_kind, Kind::Bench | Kind::Install | Kind::Miri | Kind::MiriSetup | Kind::MiriTest)
-        {
-            cargo.arg("--release");
-        }
-
         // Remove make-related flags to ensure Cargo can correctly set things up
         cargo.env_remove("MAKEFLAGS");
         cargo.env_remove("MFLAGS");
@@ -1214,14 +1220,20 @@ impl Builder<'_> {
             rustflags.arg("-Zmir_strip_debuginfo=locals-in-tiny-functions");
         }
 
+        let release_build = self.config.rust_optimize.is_release() &&
+            // cargo bench/install do not accept `--release` and miri doesn't want it
+            !matches!(cmd_kind, Kind::Bench | Kind::Install | Kind::Miri | Kind::MiriSetup | Kind::MiriTest);
+
         Cargo {
             command: cargo,
+            args: vec![],
             compiler,
             target,
             rustflags,
             rustdocflags,
             hostflags,
             allow_features,
+            release_build,
         }
     }
 }