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/reassign-ref-mut.rs | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 src/test/ui/reassign-ref-mut.rs (limited to 'src/test/ui/reassign-ref-mut.rs') diff --git a/src/test/ui/reassign-ref-mut.rs b/src/test/ui/reassign-ref-mut.rs new file mode 100644 index 000000000..d6d41e959 --- /dev/null +++ b/src/test/ui/reassign-ref-mut.rs @@ -0,0 +1,16 @@ +// Tests how we behave when the user attempts to mutate an immutable +// binding that was introduced by either `ref` or `ref mut` +// patterns. +// +// Such bindings cannot be made mutable via the mere addition of the +// `mut` keyword, and thus we want to check that the compiler does not +// suggest doing so. + +fn main() { + let (mut one_two, mut three_four) = ((1, 2), (3, 4)); + let &mut (ref a, ref mut b) = &mut one_two; + a = &three_four.0; + //~^ ERROR cannot assign twice to immutable variable `a` [E0384] + b = &mut three_four.1; + //~^ ERROR cannot assign twice to immutable variable `b` [E0384] +} -- cgit v1.2.3