Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: rm -rf %t // RUN: %clang_cc1 -fsyntax-only -verify %s -fmodules -fmodules-cache-path=%t -I%S/Inputs/PR28438 -fimplicit-module-maps #include "a.h" #include "b2.h" FOO // expected-no-diagnostics