Don't match an empty file on a read error.

1 files changed, 5 insertions, 6 deletions

diff --git a/lib/libarchive/archive_read_support_format_empty.c b/lib/libarchive/archive_read_support_format_empty.c
index db24d9d..38498cf 100644
--- a/lib/libarchive/archive_read_support_format_empty.c
+++ b/lib/libarchive/archive_read_support_format_empty.c
@@ -59,14 +59,13 @@ archive_read_support_format_empty(struct archive *_a)
 static int
 archive_read_format_empty_bid(struct archive_read *a)
 {
+	const void *h;
 	ssize_t avail;
 
-	(void)__archive_read_ahead(a, 1, &avail);
-	/* Bid 1 if we successfully read exactly zero bytes. */
-	if (avail == 0)
-		return (1);
-	/* Otherwise, we don't bid on this. */
-	return (-1);
+	h = __archive_read_ahead(a, 1, &avail);
+	if (avail != 0)
+		return (-1);
+	return (1);
 }
 
 static int