Print a slightly clearer message when failing to spawn a thread

Jethro Beekman · Jethro Beekman · commit 2ec0e85305e6 · 2019-01-22T18:55:12.000+05:30
diff --git a/src/libstd/thread/mod.rs b/src/libstd/thread/mod.rs
@@ -607,7 +607,7 @@ impl Builder {
 pub fn spawn<F, T>(f: F) -> JoinHandle<T> where
     F: FnOnce() -> T, F: Send + 'static, T: Send + 'static
 {
-    Builder::new().spawn(f).unwrap()
+    Builder::new().spawn(f).expect("failed to spawn thread")
 }
 
 /// Gets a handle to the thread that invokes it.

Original file line number	Diff line number	Diff line change
`@@ -607,7 +607,7 @@ impl Builder {`
`607`	`607`	`pub fn spawn<F, T>(f: F) -> JoinHandle<T> where`
`608`	`608`	`F: FnOnce() -> T, F: Send + 'static, T: Send + 'static`
`609`	`609`	`{`
`610`		`- Builder::new().spawn(f).unwrap()`
	`610`	`+ Builder::new().spawn(f).expect("failed to spawn thread")`
`611`	`611`	`}`
`612`	`612`
`613`	`613`	`/// Gets a handle to the thread that invokes it.`