[ruby/yarp] Check for eof in yp_regexp_char_is_eof

ruby/prism@f3fbc5bf9e

Author: stevenjohnstone

yarp/regexp.c

@@ -57,6 +57,9 @@ yp_regexp_char_expect(yp_regexp_parser_t *parser, char value) {
 // This advances the current token to the next instance of the given character.
 static bool
 yp_regexp_char_find(yp_regexp_parser_t *parser, char value) {
+    if (yp_regexp_char_is_eof(parser)) {
+        return false;
+    }
     const char *end = (const char *) memchr(parser->cursor, value, (size_t) (parser->end - parser->cursor));
     if (end == NULL) {
         return false;
@@ -383,7 +386,7 @@ yp_regexp_parse_group(yp_regexp_parser_t *parser) {
                 break;
             case '\'': { // named capture group
                 const char *start = ++parser->cursor;
-                if (yp_regexp_char_is_eof(parser) || !yp_regexp_char_find(parser, '\'')) {
+                if (!yp_regexp_char_find(parser, '\'')) {
                     return false;
                 }