| // RUN: %target-swift-frontend -sdk "" -emit-sil %s -enable-objc-interop -import-objc-header %S/Inputs/inherited-protocols-sil.h -O | |
| // <rdar://problem/24547884> Protocol Extensions May Crash Swift Compiler when Whole-Module Optimization is Enabled | |
| extension SubProto { | |
| func foo() -> Impl { | |
| return Impl(child: self) | |
| } | |
| } | |
| _ = Impl().foo() |