; Run llvm-undname with invalid inputs and make sure it doesn't crash.
; RUN: llvm-undname < %s 2>&1 | FileCheck %s

?ff@@$$J0YAXAU?$AS_@$0A@PEAU?$AS_@$0A@H@__clang@@@__clang@@@Z
; CHECK: ?ff@@$$J0YAXAU?$AS_@$0A@PEAU?$AS_@$0A@H@__clang@@@__clang@@@Z
; CHECK-NEXT: error: Invalid mangled name

?f0@@YAXPEU?$AS_@$00$$CAD@__clang@@@Z
; CHECK-EMPTY:
; CHECK-NEXT: ?f0@@YAXPEU?$AS_@$00$$CAD@__clang@@@Z
; CHECK-NEXT: error: Invalid mangled name