Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

defsym_error2.s
# RUN: not llvm-mc -filetype=obj -triple=i386-unknown-elf -defsym a=a %s 2>&1 | FileCheck %s
# CHECK: error: value is not an integer: a