Merge pull request #27116 from minuscorp/sr11108failingtest

Compiler crash for SR11108

Author: theblixguy

validation-test/compiler_crashers_2/sr11108.swift

@@ -0,0 +1,27 @@
+// RUN: not --crash %target-swift-emit-silgen %s
+
+// REQUIRES: asserts
+
+protocol Example {
+    associatedtype Signed: SignedInteger
+    associatedtype SP: StringProtocol
+    var string: String { get }
+}
+extension Example {
+    var string: String {
+        return "Foo"
+    }
+}
+class MyClass<T: SignedInteger, S: StringProtocol>: Example {
+    typealias Signed = T
+    typealias SP = S
+}
+extension MyClass where T == Int, S == String {
+    var string: String {
+        return "Bar"
+    }
+}
+
+let myclass = MyClass<Int, String>()
+
+print(myclass.string)