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/polymorphization/closure_in_upvar/fnmut.rs | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 src/test/ui/polymorphization/closure_in_upvar/fnmut.rs (limited to 'src/test/ui/polymorphization/closure_in_upvar/fnmut.rs') diff --git a/src/test/ui/polymorphization/closure_in_upvar/fnmut.rs b/src/test/ui/polymorphization/closure_in_upvar/fnmut.rs new file mode 100644 index 000000000..62164ff94 --- /dev/null +++ b/src/test/ui/polymorphization/closure_in_upvar/fnmut.rs @@ -0,0 +1,34 @@ +// build-pass +// compile-flags:-Zpolymorphize=on -Csymbol-mangling-version=v0 + +fn foo(f: impl Fn()) { + // Mutate an upvar from `x` so that it implements `FnMut`. + let mut outer = 3; + let mut x = |_: ()| { + outer = 4; + () + }; + + // Don't use `f` in `y`, but refer to `x` so that the closure substs contain a reference to + // `x` that will differ for each instantiation despite polymorphisation of the varying + // argument. + let mut y = || x(()); + + // Consider `f` used in `foo`. + f(); + // Use `y` so that it is visited in monomorphisation collection. + y(); +} + +fn entry_a() { + foo(|| ()); +} + +fn entry_b() { + foo(|| ()); +} + +fn main() { + entry_a(); + entry_b(); +} -- cgit v1.2.3