Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

unsafe-macro.c
// RUN: %clang_cc1 -Wrestrict-expansion %s -fsyntax-only -verify
#include "Inputs/unsafe-macro.h"
#include "Inputs/unsafe-macro-2.h"

// not-expected-warning@+1{{macro 'UNSAFE_MACRO' has been marked as unsafe for use in headers: Don't use this!}}
#if UNSAFE_MACRO
#endif