Replace #21158 with a better patch from Hugo

(for [perl #23769]).

p4raw-id: //depot/perl@21174

1 files changed, 1 insertions, 1 deletions

diff --git a/regcomp.c b/regcomp.c
index 80e5cfbf3d..07e68bdee3 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -3310,7 +3310,7 @@ tryagain:
 	    }
 	    if (len > 0)
 		*flagp |= HASWIDTH;
-	    if (len == 1)
+	    if (len == 1 && UNI_IS_INVARIANT(ender))
 		*flagp |= SIMPLE;
 	    if (!SIZE_ONLY)
 		STR_LEN(ret) = len;