Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
@ RUN: not llvm-mc -triple armv7a--none-eabi -filetype obj < %s -o /dev/null 2>&1 | FileCheck %s .text @ CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: expected relocatable expression ldr r0, =(-undef)