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-rw-r--r--tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-2.rs12
-rw-r--r--tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-2.stderr24
-rw-r--r--tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-3.rs11
-rw-r--r--tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-3.stderr15
4 files changed, 62 insertions, 0 deletions
diff --git a/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-2.rs b/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-2.rs
new file mode 100644
index 00000000000..e8329e3694d
--- /dev/null
+++ b/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-2.rs
@@ -0,0 +1,12 @@
+trait Foo {
+    fn rpitit() -> impl Sized;
+}
+
+// Ensure that we don't try to probe the name of the RPITIT when looking for
+// fixes to suggest for the redundant generic below.
+
+fn test<T: Foo<i32, Assoc = i32>>() {}
+//~^ ERROR trait takes 0 generic arguments but 1 generic argument was supplied
+//~| ERROR associated type `Assoc` not found for `Foo`
+
+fn main() {}
diff --git a/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-2.stderr b/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-2.stderr
new file mode 100644
index 00000000000..1058ef01f32
--- /dev/null
+++ b/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-2.stderr
@@ -0,0 +1,24 @@
+error[E0107]: trait takes 0 generic arguments but 1 generic argument was supplied
+  --> $DIR/dont-probe-missing-item-name-2.rs:8:12
+   |
+LL | fn test<T: Foo<i32, Assoc = i32>>() {}
+   |            ^^^------------------ help: remove the unnecessary generics
+   |            |
+   |            expected 0 generic arguments
+   |
+note: trait defined here, with 0 generic parameters
+  --> $DIR/dont-probe-missing-item-name-2.rs:1:7
+   |
+LL | trait Foo {
+   |       ^^^
+
+error[E0220]: associated type `Assoc` not found for `Foo`
+  --> $DIR/dont-probe-missing-item-name-2.rs:8:21
+   |
+LL | fn test<T: Foo<i32, Assoc = i32>>() {}
+   |                     ^^^^^ associated type `Assoc` not found
+
+error: aborting due to 2 previous errors
+
+Some errors have detailed explanations: E0107, E0220.
+For more information about an error, try `rustc --explain E0107`.
diff --git a/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-3.rs b/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-3.rs
new file mode 100644
index 00000000000..db39bb35437
--- /dev/null
+++ b/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-3.rs
@@ -0,0 +1,11 @@
+trait Trait {
+    fn method() -> impl Sized;
+}
+
+// Ensure that we don't try to probe the name of the RPITIT when looking for
+// fixes to suggest for the missing associated type's trait path below.
+
+fn foo() -> i32::Assoc {}
+//~^ ERROR ambiguous associated type
+
+fn main() {}
diff --git a/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-3.stderr b/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-3.stderr
new file mode 100644
index 00000000000..f30d0228a3c
--- /dev/null
+++ b/tests/ui/impl-trait/in-trait/dont-probe-missing-item-name-3.stderr
@@ -0,0 +1,15 @@
+error[E0223]: ambiguous associated type
+  --> $DIR/dont-probe-missing-item-name-3.rs:8:13
+   |
+LL | fn foo() -> i32::Assoc {}
+   |             ^^^^^^^^^^
+   |
+help: if there were a trait named `Example` with associated type `Assoc` implemented for `i32`, you could use the fully-qualified path
+   |
+LL - fn foo() -> i32::Assoc {}
+LL + fn foo() -> <i32 as Example>::Assoc {}
+   |
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0223`.