Merge "Take a getopt_long() patch from upstream FreeBSD."
diff --git a/libc/upstream-freebsd/lib/libc/stdlib/getopt_long.c b/libc/upstream-freebsd/lib/libc/stdlib/getopt_long.c
index 9534a2a..6a3067c 100644
--- a/libc/upstream-freebsd/lib/libc/stdlib/getopt_long.c
+++ b/libc/upstream-freebsd/lib/libc/stdlib/getopt_long.c
@@ -55,7 +55,7 @@
#endif /* LIBC_SCCS and not lint */
#endif
#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
+__FBSDID("$FreeBSD: head/lib/libc/stdlib/getopt_long.c 342757 2019-01-04 03:13:24Z kevans $");
#include <err.h>
#include <errno.h>
@@ -481,6 +481,8 @@
#endif
if (*place == '-') {
place++; /* --foo long option */
+ if (*place == '\0')
+ return (BADARG); /* malformed option */
#ifdef GNU_COMPATIBLE
dash_prefix = DD_PREFIX;
#endif