Exclude inherent projections from some alias ty matches

tests/ui/issue-111399.rs

@@ -0,0 +1,13 @@
+#![feature(inherent_associated_types)]
+#![allow(incomplete_features)]
+
+// Check that rustc doesn't crash on the trait bound `Self::Ty: std::marker::Freeze`.
+
+pub struct Struct;
+
+impl Struct {
+    pub type Ty = usize;
+    pub const CT: Self::Ty = 42;
+}
+
+fn main() {}