regcomp.c: Restore ptr correctly

oldp contains the pointer that we want to get to.  Use that instead
of a possibly invalid assumption about length

1 files changed, 1 insertions, 1 deletions

diff --git a/regcomp.c b/regcomp.c
index 9840097663..d03fe3e8ef 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -8787,7 +8787,7 @@ tryagain:
 		     * position the parse so that this will be called again
 		     * immediately */
 		    if (len) {
-			p  = RExC_parse + len - 1;
+			p  = oldp;
 			goto loopdone;
 		    }
 		    else {