| /* Regression test for preprocessor crash. | |
| Reported by Mathias Froehlich <frohlich@na.uni-tuebingen.de>. */ | |
| /* { dg-do preprocess } */ | |
| /* { dg-options "-ansi" } */ | |
| #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 |