Be careful to pull chars from the varargs stack when

formatting chars.

p4raw-id: //depot/perl@12292

diff --git a/regcomp.c b/regcomp.c
index 96bafd3..69fe024 100644 (file)
--- a/regcomp.c
+++ b/regcomp.c
@@ -2879,9 +2879,10 @@ tryagain:
                  /* a lovely hack--pretend we saw [\pX] instead */
                    RExC_end = strchr(RExC_parse, '}');
                    if (!RExC_end) {
+                       U8 c = (U8)*RExC_parse;
                        RExC_parse += 2;
                        RExC_end = oldregxend;
-                       vFAIL2("Missing right brace on \\%c{}", UCHARAT(RExC_parse - 2));
+                       vFAIL2("Missing right brace on \\%c{}", c);
                    }
                    RExC_end++;
                }
@@ -3421,13 +3422,14 @@ S_regclass(pTHX_ RExC_state_t *pRExC_state)
            case 'p':
            case 'P':
                if (*RExC_parse == '{') {
+                   U8 c = (U8)value;
                    e = strchr(RExC_parse++, '}');
                     if (!e)
-                        vFAIL2("Missing right brace on \\%c{}", value);
+                        vFAIL2("Missing right brace on \\%c{}", c);
                    while (isSPACE(UCHARAT(RExC_parse)))
                        RExC_parse++;
                     if (e == RExC_parse)
-                        vFAIL2("Empty \\%c{}", value);
+                        vFAIL2("Empty \\%c{}", c);
                    n = e - RExC_parse;
                    while (isSPACE(UCHARAT(RExC_parse + n - 1)))
                        n--;