Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: %clang_cc1 -verify -fsyntax-only -std=c90 %s // RUN: %clang_cc1 -verify -fsyntax-only -std=c99 %s // expected-no-diagnostics struct s { int a; }; int a[__builtin_offsetof(struct s, a) == 0];