diff options
| -rw-r--r-- | library/std/src/io/stdio.rs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/library/std/src/io/stdio.rs b/library/std/src/io/stdio.rs index 14a63303711..1ac3bbc95c6 100644 --- a/library/std/src/io/stdio.rs +++ b/library/std/src/io/stdio.rs @@ -256,6 +256,7 @@ pub struct Stdin { /// Ok(()) /// } /// ``` +#[must_use = "if unused stdin will immediately unlock"] #[stable(feature = "rust1", since = "1.0.0")] pub struct StdinLock<'a> { inner: MutexGuard<'a, BufReader<StdinRaw>>, @@ -624,6 +625,7 @@ pub struct Stdout { /// When operating in a console, the Windows implementation of this stream does not support /// non-UTF-8 byte sequences. Attempting to write bytes that are not valid UTF-8 will return /// an error. +#[must_use = "if unused stdout will immediately unlock"] #[stable(feature = "rust1", since = "1.0.0")] pub struct StdoutLock<'a> { inner: ReentrantMutexGuard<'a, RefCell<LineWriter<StdoutRaw>>>, @@ -907,6 +909,7 @@ pub struct Stderr { /// When operating in a console, the Windows implementation of this stream does not support /// non-UTF-8 byte sequences. Attempting to write bytes that are not valid UTF-8 will return /// an error. +#[must_use = "if unused stderr will immediately unlock"] #[stable(feature = "rust1", since = "1.0.0")] pub struct StderrLock<'a> { inner: ReentrantMutexGuard<'a, RefCell<StderrRaw>>, |