[BUG] Weird breakages in t1450 #2 on NonStop

From: Randall S. Becker <rsbecker@nexbridge.com>
Date: Jan 11, 2018, 14:45 UTC
Message-ID: <003601d38aea$e0e08ff0$a2a1afd0$@nexbridge.com>

This one has me scratching my head:

The object file name being reported below in t1450, subtest 2 is corrupt, but I can't figure out why the script might be generating this condition - there's nothing apparent, but it looks like the git commit -m C step is reporting or using a bad name. This breakage was not present in 2.8.5 (now at 7234152 (2.13.5) and is persistent (i.e. always happens). This is the only test in all of git where I have observed this particular situation. Adding set -x to test_commit is unrevealing. The git fsck in this test is never executed because the test_commit fails with a non-zero git commit completion code. There is no rn---- (actual r n 252 252 252 252) in the objects directory - even the 'rn' does not correspond to anything.. I am suspecting an unterminated string that ran into freed memory somewhere, but that's speculative.

Does anyone have a perspective on this - was it subsequently fixed?

Thanks, Randall

Initialized empty Git repository in /home/git/git/t/trash
directory.t1450-fsck/another/.git/
error: object directory /home/git/git/t/trash
directory.t1450-fsck/another/.git/objects/rn---- does not exist; check
.git/objects/info/alternates.
[master (root-commit) 1aac250] C
 Author: A U Thor <author@example.com>
 1 file changed, 1 insertion(+)
 create mode 100644 fileC
error: object directory /home/git/git/t/trash
directory.t1450-fsck/another/.git/objects/rn---- does not exist; check
.git/objects/info/alternates.
--- empty       2018-01-11 13:57:30 +0000
+++ actual      2018-01-11 13:57:40 +0000

@@ -0,0 +1 @@
+error: object directory /home/git/git/t/trash
directory.t1450-fsck/another/.git/objects/rn---- does not exist; check
.git/objects/info/alternates.
not ok 2 - loose objects borrowed from alternate are not missing
#
#               mkdir another &&
#               (
#                       cd another &&
#                       git init &&
#                       echo ../../../.git/objects
>.git/objects/info/alternates &&
#                       test_commit C fileC one &&
#                       git fsck --no-dangling >../actual 2>&1
#               ) &&
#               test_cmp empty actual
#

Ls -l of the objects directory:
drwxrwxr-x 1 randall ITUGLIB 4096 Jan 11 08:26 .
drwxrwxr-x 1 randall ITUGLIB 4096 Jan 11 08:26 ..
drwxrwxr-x 1 randall ITUGLIB 4096 Jan 11 08:26 13
drwxrwxr-x 1 randall ITUGLIB 4096 Jan 11 08:26 56
drwxrwxr-x 1 randall ITUGLIB 4096 Jan 11 08:26 bd
drwxrwxr-x 1 randall ITUGLIB 4096 Jan 11 08:26 c9
drwxrwxr-x 1 randall ITUGLIB 4096 Jan 11 08:26 f7
drwxrwxr-x 1 randall ITUGLIB 4096 Jan 11 08:26 info
drwxrwxr-x 1 randall ITUGLIB 4096 Jan 11 08:26 pack
from find:
./13
./13/4756353796a5439d93586be27999eea3807a34
./56
./56/26abf0f72e58d7a153368ba57db4c673c0e171
./bd
./bd/04fbdc74c1ad468ee1cc86d49860490ab3e6c7
./c9
./c9/145d6720f85544cc4bb6009a2e541660aa156b
./c9/176b0dd1a95c80ad8de21784b1eeffd3681f49
./f7
./f7/19efd430d52bcfc8566a43b2eb655688d38871
./info
./pack