1 files changed, 60 insertions, 0 deletions
diff --git a/tests/codegen-units/item-collection/trait-method-as-argument.rs b/tests/codegen-units/item-collection/trait-method-as-argument.rs
new file mode 100644
index 000000000..235569728
--- /dev/null
+++ b/tests/codegen-units/item-collection/trait-method-as-argument.rs
@@ -0,0 +1,60 @@
+//
+// compile-flags:-Zprint-mono-items=eager
+
+#![deny(dead_code)]
+#![feature(start)]
+
+trait Trait : Sized {
+    fn foo(self) -> Self { self }
+}
+
+impl Trait for u32 {
+    fn foo(self) -> u32 { self }
+}
+
+impl Trait for char {
+}
+
+fn take_foo_once<T, F: FnOnce(T) -> T>(f: F, arg: T) -> T {
+    (f)(arg)
+}
+
+fn take_foo<T, F: Fn(T) -> T>(f: F, arg: T) -> T {
+    (f)(arg)
+}
+
+fn take_foo_mut<T, F: FnMut(T) -> T>(mut f: F, arg: T) -> T {
+    (f)(arg)
+}
+
+//~ MONO_ITEM fn start
+#[start]
+fn start(_: isize, _: *const *const u8) -> isize {
+    //~ MONO_ITEM fn take_foo_once::<u32, fn(u32) -> u32 {<u32 as Trait>::foo}>
+    //~ MONO_ITEM fn <u32 as Trait>::foo
+    //~ MONO_ITEM fn <fn(u32) -> u32 {<u32 as Trait>::foo} as std::ops::FnOnce<(u32,)>>::call_once - shim(fn(u32) -> u32 {<u32 as Trait>::foo})
+    take_foo_once(Trait::foo, 0u32);
+
+    //~ MONO_ITEM fn take_foo_once::<char, fn(char) -> char {<char as Trait>::foo}>
+    //~ MONO_ITEM fn <char as Trait>::foo
+    //~ MONO_ITEM fn <fn(char) -> char {<char as Trait>::foo} as std::ops::FnOnce<(char,)>>::call_once - shim(fn(char) -> char {<char as Trait>::foo})
+    take_foo_once(Trait::foo, 'c');
+
+    //~ MONO_ITEM fn take_foo::<u32, fn(u32) -> u32 {<u32 as Trait>::foo}>
+    //~ MONO_ITEM fn <fn(u32) -> u32 {<u32 as Trait>::foo} as std::ops::Fn<(u32,)>>::call - shim(fn(u32) -> u32 {<u32 as Trait>::foo})
+    take_foo(Trait::foo, 0u32);
+
+    //~ MONO_ITEM fn take_foo::<char, fn(char) -> char {<char as Trait>::foo}>
+    //~ MONO_ITEM fn <fn(char) -> char {<char as Trait>::foo} as std::ops::Fn<(char,)>>::call - shim(fn(char) -> char {<char as Trait>::foo})
+    take_foo(Trait::foo, 'c');
+
+    //~ MONO_ITEM fn take_foo_mut::<u32, fn(u32) -> u32 {<u32 as Trait>::foo}>
+    //~ MONO_ITEM fn <fn(u32) -> u32 {<u32 as Trait>::foo} as std::ops::FnMut<(u32,)>>::call_mut - shim(fn(u32) -> u32 {<u32 as Trait>::foo})
+    take_foo_mut(Trait::foo, 0u32);
+
+    //~ MONO_ITEM fn take_foo_mut::<char, fn(char) -> char {<char as Trait>::foo}>
+    //~ MONO_ITEM fn <fn(char) -> char {<char as Trait>::foo} as std::ops::FnMut<(char,)>>::call_mut - shim(fn(char) -> char {<char as Trait>::foo})
+    take_foo_mut(Trait::foo, 'c');
+
+    0
+}