diff options
Diffstat (limited to 'src/test/ui/transmute/transmute-imut-to-mut.rs')
| -rw-r--r-- | src/test/ui/transmute/transmute-imut-to-mut.rs | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/test/ui/transmute/transmute-imut-to-mut.rs b/src/test/ui/transmute/transmute-imut-to-mut.rs new file mode 100644 index 000000000..9f3f76c1e --- /dev/null +++ b/src/test/ui/transmute/transmute-imut-to-mut.rs @@ -0,0 +1,8 @@ +// Tests that transmuting from &T to &mut T is Undefined Behavior. + +use std::mem::transmute; + +fn main() { + let _a: &mut u8 = unsafe { transmute(&1u8) }; + //~^ ERROR transmuting &T to &mut T is undefined behavior, even if the reference is unused, consider instead using an UnsafeCell +} |