Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: not llvm-as < %s -disable-output 2>&1 | FileCheck %s ; CHECK: <stdin>:[[@LINE+1]]:26: error: invalid DWARF tag 'DW_TAG_badtag' !0 = !GenericDINode(tag: DW_TAG_badtag)