checkout-index: fix --temp relative path mangling

diff --git a/builtin/update-index.c b/builtin/update-index.c
index ba54e19cd559018fcca52b5251bffa78165e16a3..ebea285e1b6863bdb8e4b2a30d1487d18ecc5084 100644 (file)
--- a/builtin/update-index.c
+++ b/builtin/update-index.c
@@ -637,6 +637,9 @@ static int parse_new_style_cacheinfo(const char *arg,
        unsigned long ul;
        char *endp;
 
+       if (!arg)
+               return -1;
+
        errno = 0;
        ul = strtoul(arg, &endp, 8);
        if (errno || endp == arg || *endp != ',' || (unsigned int) ul != ul)