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/consts/control-flow/interior-mutability.rs | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 src/test/ui/consts/control-flow/interior-mutability.rs (limited to 'src/test/ui/consts/control-flow/interior-mutability.rs') diff --git a/src/test/ui/consts/control-flow/interior-mutability.rs b/src/test/ui/consts/control-flow/interior-mutability.rs new file mode 100644 index 000000000..a6d44237b --- /dev/null +++ b/src/test/ui/consts/control-flow/interior-mutability.rs @@ -0,0 +1,43 @@ +// Ensure that *any* assignment to the return place of a value with interior mutability +// disqualifies it from promotion. + +use std::cell::Cell; + +const X: Option> = { + let mut x = None; + if false { + x = Some(Cell::new(4)); + } + x +}; + +const Y: Option> = { + let mut y = Some(Cell::new(4)); + if true { + y = None; + } + y +}; + +const Z: Option> = { + let mut z = None; + let mut i = 0; + while i < 10 { + if i == 8 { + z = Some(Cell::new(4)); + } + + if i == 9 { + z = None; + } + + i += 1; + } + z +}; + +fn main() { + let x: &'static _ = &X; //~ ERROR temporary value dropped while borrowed + let y: &'static _ = &Y; //~ ERROR temporary value dropped while borrowed + let z: &'static _ = &Z; //~ ERROR temporary value dropped while borrowed +} -- cgit v1.2.3