diff options
Diffstat (limited to 'src/test/ui/polymorphization/closure_in_upvar/fn.rs')
-rw-r--r-- | src/test/ui/polymorphization/closure_in_upvar/fn.rs | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/ui/polymorphization/closure_in_upvar/fn.rs b/src/test/ui/polymorphization/closure_in_upvar/fn.rs new file mode 100644 index 000000000..e10308588 --- /dev/null +++ b/src/test/ui/polymorphization/closure_in_upvar/fn.rs @@ -0,0 +1,29 @@ +// build-pass +// compile-flags:-Zpolymorphize=on -Csymbol-mangling-version=v0 + +fn foo(f: impl Fn()) { + let x = |_: ()| (); + + // 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 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(); +} |