if (backslash_escapes
&& quote_string_len
- && i + quote_string_len <= argsize
+ && (i + quote_string_len
+ <= (argsize == SIZE_MAX && 1 < quote_string_len
+ /* Use strlen only if we must: when argsize is SIZE_MAX,
+ and when the quote string is more than 1 byte long.
+ If we do call strlen, save the result. */
+ ? (argsize = strlen (arg)) : argsize))
&& memcmp (arg + i, quote_string, quote_string_len) == 0)
{
if (elide_outer_quotes)