Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
# RUN: not llvm-reduce --test=echo %s.NotAFileInTestingDir 2>&1 | FileCheck %s This file will not be read. An invalid file path is fed to llvm-reduce. # CHECK: llvm-reduce{{.*}}: error: {{.*}}.NotAFileInTestingDir: