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-rw-r--r--regex/engine.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/regex/engine.c b/regex/engine.c
index 55f5f1723df..1968ca61a96 100644
--- a/regex/engine.c
+++ b/regex/engine.c
@@ -256,7 +256,7 @@ sopno stopst;
register char *ssp; /* start of string matched by subsubRE */
register char *sep; /* end of string matched by subsubRE */
register char *oldssp; /* previous ssp */
- register char *dp;
+ register char *dp; /* used in debug mode to check asserts */
AT("diss", start, stop, startst, stopst);
sp = start;