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 --- .../ui/borrowck/borrowck-union-borrow-nested.rs | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 src/test/ui/borrowck/borrowck-union-borrow-nested.rs (limited to 'src/test/ui/borrowck/borrowck-union-borrow-nested.rs') diff --git a/src/test/ui/borrowck/borrowck-union-borrow-nested.rs b/src/test/ui/borrowck/borrowck-union-borrow-nested.rs new file mode 100644 index 000000000..b3a6670fa --- /dev/null +++ b/src/test/ui/borrowck/borrowck-union-borrow-nested.rs @@ -0,0 +1,31 @@ +#[derive(Clone, Copy)] +struct S { + a: u8, + b: u16, +} + +#[derive(Clone, Copy)] +union U { + s: S, + c: u32, +} + +fn main() { + unsafe { + { + let mut u = U { s: S { a: 0, b: 1 } }; + let ra = &mut u.s.a; + let b = u.s.b; // OK + ra.use_mut(); + } + { + let mut u = U { s: S { a: 0, b: 1 } }; + let ra = &mut u.s.a; + let b = u.c; //~ ERROR cannot use `u.c` because it was mutably borrowed + ra.use_mut(); + } + } +} + +trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } } +impl Fake for T { } -- cgit v1.2.3