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-rw-r--r--awk.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/awk.h b/awk.h
index 09c929c2..ca648087 100644
--- a/awk.h
+++ b/awk.h
@@ -1376,8 +1376,8 @@ extern void r_freeblock(void *, int id);
#define ALREADY_MALLOCED 2
#define ELIDE_BACK_NL 4
-#define cant_happen() r_fatal("internal error line %d, file: %s", \
- __LINE__, __FILE__)
+#define cant_happen(format, ...) r_fatal("internal error: file %s, line %d: " format, \
+ __FILE__, __LINE__, __VA_ARGS__)
#define emalloc(var,ty,x,str) (void) (var = (ty) emalloc_real((size_t)(x), str, #var, __FILE__, __LINE__))
#define ezalloc(var,ty,x,str) (void) (var = (ty) ezalloc_real((size_t)(x), str, #var, __FILE__, __LINE__))