[RFC PATCH 12/21] pack-objects: use BUG(...) not die("BUG: ...")

Change this code added in da93d12b004 (pack-objects: be incredibly
anal about stdio semantics, 2006-04-02) to use BUG() instead.

See 1a07e59c3e2 (Update messages in preparation for i18n, 2018-07-21)
for when the "BUG: " prefix was added, and [1] for background on the
Solaris behavior that prompted the exhaustive error checking in this
fgets() loop.

1. https://lore.kernel.org/git/824.1144007555@lotus.CS.Berkeley.EDU/ (local)

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
 builtin/pack-objects.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 1a3dd445f83..0b1f82cd3ad 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c

@@ -3397,7 +3397,7 @@ static void read_object_list_from_stdin(void)
 			if (feof(stdin))
 				break;
 			if (!ferror(stdin))
-				die("BUG: fgets returned NULL, not EOF, not error!");
+				BUG("fgets returned NULL, not EOF, not error!");
 			if (errno != EINTR)
 				die_errno("fgets");
 			clearerr(stdin);

-- 
2.34.0.rc2.809.g11e21d44b24