From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- src/test/ui/transmute/transmute-imut-to-mut.rs | 8 ++++++++ 1 file changed, 8 insertions(+) create mode 100644 src/test/ui/transmute/transmute-imut-to-mut.rs (limited to 'src/test/ui/transmute/transmute-imut-to-mut.rs') 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 +} -- cgit v1.2.3