scripts/spatch/waserror.cocci - upstream - Git at Google

 @@
 type T;
 identifier f;
 @@
 T f(...)
 {
 +ERRSTACK(2);
 ...
 waserror() ...}
	@@
	type T;
	identifier f;
	@@
	T f(...)
	{
	+ERRSTACK(2);
	...
	waserror() ...}