Unrolled build for rust-lang#131991

Rollup merge of rust-lang#131991 - jannden:issue-98565-test, r=jieyouxu

test: Add test for trait in FQS cast, issue rust-lang#98565

Closes rust-lang#98565 by adding a test to check for diagnostics when the built-in type `str` is used in a cast where a trait is expected.

tests/ui/traits/fully-qualified-syntax-cast.rs

@@ -0,0 +1,15 @@
+// Regression test for #98565: Provide diagnostics when the user uses
+// the built-in type `str` in a cast where a trait is expected.
+
+trait Foo {
+ fn foo(&self);
+}
+
+impl Foo for String {
+ fn foo(&self) {
+ <Self as str>::trim(self);
+ //~^ ERROR expected trait, found builtin type `str`
+ }
+}
+
+fn main() {}

tests/ui/traits/fully-qualified-syntax-cast.stderr

@@ -0,0 +1,9 @@
+error[E0404]: expected trait, found builtin type `str`
+ --> $DIR/fully-qualified-syntax-cast.rs:10:18
+ |
+LL | <Self as str>::trim(self);
+ | ^^^ not a trait
+
+error: aborting due to 1 previous error
+
+For more information about this error, try `rustc --explain E0404`.