--- /dev/null
+; RUN: not llvm-as < %s 2>&1 | FileCheck %s
+
+!0 = !DILocalVariable(tag: DW_TAG_arg_variable, scope: !{}, arg: 0)
+
+; CHECK: <stdin>:[[@LINE+1]]:66: error: expected unsigned integer
+!1 = !DILocalVariable(tag: DW_TAG_arg_variable, scope: !{}, arg: -1)