Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: not llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o %t 2>&1 | FileCheck %s // CHECK: error: Undefined section reference: .debug_pubnames .section .foo,"",@progbits .long .debug_pubnames