Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: not llvm-mc -triple aarch64--none-eabi -filetype obj < %s -o /dev/null 2>&1 | FileCheck %s .text // CHECK: :[[@LINE+1]]:{{[0-9]+}}: error: expected relocatable expression ldr x0, =(-undef)