Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

missing_dwo_id.test
RUN: rm -f %t
RUN: not llvm-dwp %p/../Inputs/missing_dwo_id.dwo -o %t 2>&1 | FileCheck %s

Make sure we did not leave behind a temporary file:
RUN: not ls %t

CHECK: error: {{.*}}missing_dwo_id.dwo': compile unit missing dwo_id