v0 mangling for std on nightly

davidtwco · davidtwco · commit 5e4a05f8ce77 · 2025-11-20T14:42:41.000Z
diff --git a/src/bootstrap/src/core/builder/cargo.rs b/src/bootstrap/src/core/builder/cargo.rs
@@ -647,6 +647,8 @@ impl Builder<'_> {
                 // If an explicit setting is given, use that
                 setting
             }
+            // Per compiler-team#938, v0 mangling is used on nightly
+            None if self.config.channel == "dev" || self.config.channel == "nightly" => true,
             None => {
                 if mode == Mode::Std {
                     // The standard library defaults to the legacy scheme

Original file line number	Diff line number	Diff line change
`@@ -647,6 +647,8 @@ impl Builder<'_> {`
`647`	`647`	`// If an explicit setting is given, use that`
`648`	`648`	`setting`
`649`	`649`	`}`
	`650`	`+ // Per compiler-team#938, v0 mangling is used on nightly`
	`651`	`+ None if self.config.channel == "dev" \|\| self.config.channel == "nightly" => true,`
`650`	`652`	`None => {`
`651`	`653`	`if mode == Mode::Std {`
`652`	`654`	`// The standard library defaults to the legacy scheme`