test/Preprocessor/Inputs/cycle/a.h - clang - Git at Google

 // Presence of 2 inclusion cycles
 //    b.h -> a.h -> b.h -> ...
 //    c.h -> a.h -> c.h -> ...
 // makes it unfeasible to reach max inclusion depth in all possible ways. Need
 // to stop earlier.

 #include "b.h"
 #include "c.h"
	// Presence of 2 inclusion cycles
	// b.h -> a.h -> b.h -> ...
	// c.h -> a.h -> c.h -> ...
	// makes it unfeasible to reach max inclusion depth in all possible ways. Need
	// to stop earlier.

	#include "b.h"
	#include "c.h"