FS-4675 --resolve

src/mod/applications/mod_commands/mod_commands.c

@@ -1563,15 +1563,19 @@ SWITCH_STANDARD_API(regex_function)
 	proceed = switch_regex_perform(argv[0], argv[1], &re, ovector, sizeof(ovector) / sizeof(ovector[0]));
 
 	if (argc > 2) {
-		len = (strlen(argv[0]) + strlen(argv[2]) + 10) * proceed;
-		substituted = malloc(len);
-		switch_assert(substituted);
-		memset(substituted, 0, len);
-		switch_replace_char(argv[2], '%', '$', SWITCH_FALSE);
-		switch_perform_substitution(re, proceed, argv[2], argv[0], substituted, len, ovector);
-
-		stream->write_function(stream, "%s", substituted);
-		free(substituted);
+		if (proceed) {
+			len = (strlen(argv[0]) + strlen(argv[2]) + 10) * proceed;
+			substituted = malloc(len);
+			switch_assert(substituted);
+			memset(substituted, 0, len);
+			switch_replace_char(argv[2], '%', '$', SWITCH_FALSE);
+			switch_perform_substitution(re, proceed, argv[2], argv[0], substituted, len, ovector);
+
+			stream->write_function(stream, "%s", substituted);
+			free(substituted);
+		} else {
+			stream->write_function(stream, "%s", argv[0]);
+		}
 	} else {
 		stream->write_function(stream, proceed ? "true" : "false");
 	}