Merge pull request swiftlang#8232 from slavapestov/two-more-crashers

Last two crashers for the evening

Author: slavapestov

validation-test/compiler_crashers_2/0085-rdar31000248.swift

@@ -0,0 +1,16 @@
+// RUN: not --crash %target-swift-frontend -emit-silgen -primary-file %s -o /dev/null
+
+class Base<T> {
+  convenience init(count: Int) {
+    self.init(count: count, designated: ())
+  }
+
+  init(count: Int, designated: ()) {
+  }
+}
+
+class Derived<T> : Base<T> {
+  convenience init() {
+    self.init(count: 0)
+  }
+}

validation-test/compiler_crashers_2/0086-sr4301.swift

@@ -0,0 +1,15 @@
+// RUN: not --crash %target-swift-frontend -typecheck -primary-file %s
+
+protocol P {
+  init()
+}
+
+extension P {
+  public init(x: Int, y: Int? = nil) {
+    self.init()
+  }
+}
+
+func foo(t: P.Type, a: Int) {
+  let _ = t(x: a)
+}