/* Regression test for preprocessor crash. Reported by Mathias Froehlich <frohlich@na.uni-tuebingen.de>. */ /* { dg-do preprocess } */ #define foo #define __CAT__(a,b,c,d) a##b##c##d #define CAT(a,b,c,d) __CAT__(a,b,c,d) #define bar CAT(,foo,bar,) bar