Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
@import StdDef.Other; size_t getSize(void); // RUN: rm -rf %t // RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -I %S/Inputs/StdDef %s -verify // expected-no-diagnostics