Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
/* RUN: %clang_cc1 %s -ast-print */ void foo() { int X; X = sizeof(void (*(*)())()); X = sizeof(int(*)(int, float, ...)); X = sizeof(void (*(int arga, void (*argb)(double Y)))(void* Z)); }