Merge pull request swiftlang#84451 from slavapestov/test-84419

Sema: Add test case for swiftlang#84419

Author: slavapestov

test/Generics/issue-84419.swift

@@ -0,0 +1,7 @@
+// RUN: %target-typecheck-verify-swift -swift-version 6
+
+struct G<T: Sequence> where T == Int {
+// expected-error@-1 {{no type for 'T' can satisfy both 'T == Int' and 'T : Sequence'}}
+// expected-error@-2 {{same-type requirement makes generic parameter 'T' non-generic}}
+  let t: T
+}