rollup merge of #22319: huonw/send-is-not-static

Conflicts:
	src/libstd/sync/task_pool.rs
	src/libstd/thread.rs
	src/libtest/lib.rs
	src/test/bench/shootout-reverse-complement.rs
	src/test/bench/shootout-spectralnorm.rs

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstd/rt/mod.rs b/src/libstd/rt/mod.rs
index 00088d6d99a..42cca73e5e2 100644
--- a/src/libstd/rt/mod.rs
+++ b/src/libstd/rt/mod.rs
@@ -148,7 +148,7 @@ fn lang_start(main: *const u8, argc: int, argv: *const *const u8) -> int {
 ///
 /// It is forbidden for procedures to register more `at_exit` handlers when they
 /// are running, and doing so will lead to a process abort.
-pub fn at_exit<F:FnOnce()+Send>(f: F) {
+pub fn at_exit<F:FnOnce()+Send+'static>(f: F) {
     at_exit_imp::push(Thunk::new(f));
 }