1 files changed, 1 insertions, 1 deletions
diff --git a/library/std/src/sys/unix/locks/pthread_condvar.rs b/library/std/src/sys/unix/locks/pthread_condvar.rs
index abf27e7db..4741c0c67 100644
--- a/library/std/src/sys/unix/locks/pthread_condvar.rs
+++ b/library/std/src/sys/unix/locks/pthread_condvar.rs
@@ -172,7 +172,7 @@ impl Condvar {
         let mut sys_now = libc::timeval { tv_sec: 0, tv_usec: 0 };
         let stable_now = Instant::now();
         let r = libc::gettimeofday(&mut sys_now, ptr::null_mut());
-        debug_assert_eq!(r, 0);
+        assert_eq!(r, 0, "unexpected error: {:?}", crate::io::Error::last_os_error());
 
         let nsec = dur.subsec_nanos() as libc::c_long + (sys_now.tv_usec * 1000) as libc::c_long;
         let extra = (nsec / 1_000_000_000) as libc::time_t;