diff options
Diffstat (limited to 'src/libcore')
| -rw-r--r-- | src/libcore/ops/function.rs | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libcore/ops/function.rs b/src/libcore/ops/function.rs index 04c7789fa4f..2cdfee87a35 100644 --- a/src/libcore/ops/function.rs +++ b/src/libcore/ops/function.rs @@ -224,6 +224,7 @@ pub trait FnMut<Args>: FnOnce<Args> { #[must_use = "closures are lazy and do nothing unless called"] pub trait FnOnce<Args> { /// The returned type after the call operator is used. + #[cfg_attr(not(bootstrap), lang = "fn_once_output")] #[stable(feature = "fn_once_output", since = "1.12.0")] type Output; |