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 --- .../diagnostics/cant-mutate-imm-borrow.rs | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 src/test/ui/closures/2229_closure_analysis/diagnostics/cant-mutate-imm-borrow.rs (limited to 'src/test/ui/closures/2229_closure_analysis/diagnostics/cant-mutate-imm-borrow.rs') diff --git a/src/test/ui/closures/2229_closure_analysis/diagnostics/cant-mutate-imm-borrow.rs b/src/test/ui/closures/2229_closure_analysis/diagnostics/cant-mutate-imm-borrow.rs new file mode 100644 index 000000000..77effcb00 --- /dev/null +++ b/src/test/ui/closures/2229_closure_analysis/diagnostics/cant-mutate-imm-borrow.rs @@ -0,0 +1,19 @@ +// edition:2021 + +// Test that if we deref an immutable borrow to access a Place, +// then we can't mutate the final place. + +fn main() { + let mut x = (format!(""), format!("X2")); + let mut y = (&x, "Y"); + let z = (&mut y, "Z"); + + // `x.0` is mutable but we access `x` via `*z.0.0`, which is an immutable reference and + // therefore can't be mutated. + let mut c = || { + //~^ ERROR: cannot borrow `*z.0.0` as mutable, as it is behind a `&` reference + z.0.0.0 = format!("X1"); + }; + + c(); +} -- cgit v1.2.3