1 files changed, 20 insertions, 1 deletions
diff --git a/tests/ui/traits/new-solver/fn-trait.rs b/tests/ui/traits/new-solver/fn-trait.rs
index d566ead10..0599e51d7 100644
--- a/tests/ui/traits/new-solver/fn-trait.rs
+++ b/tests/ui/traits/new-solver/fn-trait.rs
@@ -1,5 +1,4 @@
 // compile-flags: -Ztrait-solver=next
-// check-pass
 
 fn require_fn(_: impl Fn() -> i32) {}
 
@@ -7,7 +6,27 @@ fn f() -> i32 {
     1i32
 }
 
+extern "C" fn g() -> i32 {
+    2i32
+}
+
+unsafe fn h() -> i32 {
+    2i32
+}
+
 fn main() {
     require_fn(f);
     require_fn(f as fn() -> i32);
+    require_fn(f as unsafe fn() -> i32);
+    //~^ ERROR: expected a `Fn<()>` closure, found `unsafe fn() -> i32`
+    //~| ERROR: type mismatch resolving `<unsafe fn() -> i32 as FnOnce<()>>::Output == i32`
+    require_fn(g);
+    //~^ ERROR: expected a `Fn<()>` closure, found `extern "C" fn() -> i32 {g}`
+    //~| ERROR: type mismatch resolving `<extern "C" fn() -> i32 {g} as FnOnce<()>>::Output == i32`
+    require_fn(g as extern "C" fn() -> i32);
+    //~^ ERROR: expected a `Fn<()>` closure, found `extern "C" fn() -> i32`
+    //~| ERROR: type mismatch resolving `<extern "C" fn() -> i32 as FnOnce<()>>::Output == i32`
+    require_fn(h);
+    //~^ ERROR: expected a `Fn<()>` closure, found `unsafe fn() -> i32 {h}`
+    //~| ERROR: type mismatch resolving `<unsafe fn() -> i32 {h} as FnOnce<()>>::Output == i32`
 }