#include "builtin.h"
#include "cache.h"
+#include "config.h"
#include "xdiff/xdiff.h"
#include "xdiff-interface.h"
#include "parse-options.h"
static int label_count = 0;
const char **names = (const char **)opt->value;
+ BUG_ON_OPT_NEG(unset);
+
if (label_count >= 3)
return error("too many labels on the command line");
names[label_count++] = arg;