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-rw-r--r--ext/pcre/php_pcre.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/pcre/php_pcre.c b/ext/pcre/php_pcre.c
index 496418a72e..7d414a3858 100644
--- a/ext/pcre/php_pcre.c
+++ b/ext/pcre/php_pcre.c
@@ -209,7 +209,7 @@ static char **make_subpats_table(int num_subpats, pcre_cache_entry *pce TSRMLS_D
}
while (ni++ < name_cnt) {
- name_idx = 0xff * name_table[0] + name_table[1];
+ name_idx = 0xff * (unsigned char)name_table[0] + (unsigned char)name_table[1];
subpat_names[name_idx] = name_table + 2;
if (is_numeric_string(subpat_names[name_idx], strlen(subpat_names[name_idx]), NULL, NULL, 0) > 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Numeric named subpatterns are not allowed");