Rollup merge of #96830 - JohnTitor:issue-96654, r=compiler-errors

Add and tweak const-generics tests

Closes #96654
Also correct the src/test/ui/const-generics/issues/issue-77357.rs test's issue number.

src/test/ui/const-generics/issues/issue-775377.stderr → src/test/ui/const-generics/issues/issue-77357.stderr

@@ -1,5 +1,5 @@
 error: overly complex generic constant
-  --> $DIR/issue-775377.rs:6:46
+  --> $DIR/issue-77357.rs:6:46
    |
 LL | fn bug<'a, T>() -> &'static dyn MyTrait<[(); { |x: &'a u32| { x }; 4 }]> {
    |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^ blocks are not supported in generic constant

src/test/ui/const-generics/issues/issue-96654.rs

@@ -0,0 +1,15 @@
+// check-pass
+
+struct A<const M: u32> {}
+
+struct B<const M: u32> {}
+
+impl<const M: u32> B<M> {
+    const M: u32 = M;
+}
+
+struct C<const M: u32> {
+    a: A<{ B::<1>::M }>,
+}
+
+fn main() {}