Use faster thread_local! for stdout

kornelski · gitbot · commit be8323f61608 · 2025-03-11T09:46:37.000Z
diff --git a/std/src/io/stdio.rs b/std/src/io/stdio.rs
@@ -20,7 +20,7 @@ type LocalStream = Arc<Mutex<Vec<u8>>>;
 
 thread_local! {
     /// Used by the test crate to capture the output of the print macros and panics.
-    static OUTPUT_CAPTURE: Cell<Option<LocalStream>> = {
+    static OUTPUT_CAPTURE: Cell<Option<LocalStream>> = const {
         Cell::new(None)
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -20,7 +20,7 @@ type LocalStream = Arc<Mutex<Vec<u8>>>;`
`20`	`20`
`21`	`21`	`thread_local! {`
`22`	`22`	`/// Used by the test crate to capture the output of the print macros and panics.`
`23`		`- static OUTPUT_CAPTURE: Cell<Option<LocalStream>> = {`
	`23`	`+ static OUTPUT_CAPTURE: Cell<Option<LocalStream>> = const {`
`24`	`24`	`Cell::new(None)`
`25`	`25`	`}`
`26`	`26`	`}`