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/consts/const-eval/ub-enum-overwrite.rs | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) create mode 100644 src/test/ui/consts/const-eval/ub-enum-overwrite.rs (limited to 'src/test/ui/consts/const-eval/ub-enum-overwrite.rs') diff --git a/src/test/ui/consts/const-eval/ub-enum-overwrite.rs b/src/test/ui/consts/const-eval/ub-enum-overwrite.rs new file mode 100644 index 000000000..c56778492 --- /dev/null +++ b/src/test/ui/consts/const-eval/ub-enum-overwrite.rs @@ -0,0 +1,17 @@ +#![feature(const_mut_refs)] + +enum E { + A(u8), + B, +} + +const _: u8 = { + //~^ ERROR is undefined behavior + let mut e = E::A(1); + let p = if let E::A(x) = &mut e { x as *mut u8 } else { unreachable!() }; + // Make sure overwriting `e` uninitializes other bytes + e = E::B; + unsafe { *p } +}; + +fn main() {} -- cgit v1.2.3