1 files changed, 53 insertions, 0 deletions
diff --git a/src/test/ui/traits/negative-impls/explicitly-unimplemented-error-message.rs b/src/test/ui/traits/negative-impls/explicitly-unimplemented-error-message.rs
new file mode 100644
index 000000000..1314f9cb0
--- /dev/null
+++ b/src/test/ui/traits/negative-impls/explicitly-unimplemented-error-message.rs
@@ -0,0 +1,53 @@
+// This tests issue #79683: note in the error message that the trait is
+// explicitely unimplemented instead of suggesting to implement it.
+
+#![feature(negative_impls)]
+
+struct Qux;
+//~^ NOTE method `clone` not found for this
+//~^^ NOTE method `foo` not found for this
+
+impl !Clone for Qux {}
+
+trait Bar {
+    fn bar(&self);
+}
+
+impl !Bar for u32 {}
+
+trait Foo {
+    fn foo(&self);
+}
+//~^^^ NOTE `Foo` defines an item `foo`, perhaps you need to implement it
+
+trait FooBar {
+    fn foo(&self);
+}
+
+impl !Foo for Qux {}
+
+impl !FooBar for Qux {}
+
+impl !FooBar for u32 {}
+
+fn main() {
+    Qux.clone();
+    //~^ ERROR no method named `clone` found for struct `Qux`
+    //~| NOTE method not found in `Qux`
+    //~| NOTE `Clone` defines an item `clone`, but is explicitly unimplemented
+
+    0_u32.bar();
+    //~^ ERROR no method named `bar` found for type `u32`
+    //~| NOTE method not found in `u32`
+    //~| NOTE `Bar` defines an item `bar`, but is explicitly unimplemented
+
+    Qux.foo();
+    //~^ ERROR no method named `foo` found for struct `Qux`
+    //~| NOTE method not found in `Qux`
+    //~| NOTE the following traits define an item `foo`, but are explicitly unimplemented
+
+    0_u32.foo();
+    //~^ ERROR no method named `foo` found for type `u32`
+    //~| NOTE method not found in `u32`
+    //~| NOTE `FooBar` defines an item `foo`, but is explicitly unimplemented
+}