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Patrick Steinhardt 7355574a22 t0610: work around flaky test with concurrent writers
In 6241ce2170 (refs/reftable: reload locked stack when preparing
transaction, 2024-09-24) we have introduced a new test that exercises
how the reftable backend behaves with many concurrent writers all racing
with each other. This test was introduced after a couple of fixes in
this context that should make concurrent writes behave gracefully. As it
turns out though, Windows systems do not yet handle concurrent writes
properly, as we've got two reports for Cygwin and MinGW failing in this
newly added test.

The root cause of this is how we update the "tables.list" file: when
writing a new stack of tables we first write the data into a lockfile
and then rename that file into place. But Windows forbids us from doing
that rename when the target path is open for reading by another process.
And as the test races both readers and writers with each other we are
quite likely to hit this edge case.

This is not a regression: the logic didn't work before the mentioned
commit, and after the commit it performs well on Linux and macOS, and
the situation on Windows should have at least improved a bit. But the
test shows that we need to put more thought into how to make this work
properly there.

Work around the issue by disabling the test on Windows for now. While at
it, increase the locking timeout to address reported timeouts when using
either the address or memory sanitizer, which also tend to significantly
extend the runtime of this test.

This should be revisited after Git v2.47 is out.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-10-04 09:34:47 -07:00
.github Merge branch 'jk/ci-linux32-update' 2024-09-16 15:27:08 -07:00
Documentation refs/reftable: introduce "reftable.lockTimeout" 2024-09-24 09:45:25 -07:00
block-sha1
builtin Sync with 'maint' 2024-09-16 15:27:46 -07:00
ci Merge branch 'jk/ci-linux32-update' 2024-09-16 15:27:08 -07:00
compat Merge branch 'rj/compat-terminal-unused-fix' 2024-09-10 13:16:42 -07:00
contrib Merge branch 'ps/clar-unit-test' 2024-09-18 18:02:05 -07:00
ewah
git-gui
gitk-git
gitweb
mergetools mergetools: vscode: new tool 2024-09-01 20:47:58 -07:00
negotiator drop trailing newline from warning/error/die messages 2024-09-05 09:07:12 -07:00
oss-fuzz oss-fuzz: mark unused argv/argc argument 2024-08-17 09:46:11 -07:00
perl
po
refs refs/reftable: reload locked stack when preparing transaction 2024-09-24 09:45:26 -07:00
reftable reftable/stack: allow locking of outdated stacks 2024-09-24 09:45:25 -07:00
sha1
sha1collisiondetection@855827c583
sha1dc
sha256
t t0610: work around flaky test with concurrent writers 2024-10-04 09:34:47 -07:00
templates
trace2 trace2: implement trace2_printf() for event target 2024-08-22 15:02:31 -07:00
xdiff
.cirrus.yml
.clang-format Merge branch 'rs/unit-tests-test-run' 2024-08-19 11:07:36 -07:00
.editorconfig
.gitattributes
.gitignore Makefile: wire up the clar unit testing framework 2024-09-04 08:41:37 -07:00
.gitlab-ci.yml Merge branch 'jk/ci-linux32-update' 2024-09-16 15:27:08 -07:00
.gitmodules
.mailmap .mailmap document current address. 2024-09-06 09:31:15 -07:00
.tsan-suppressions
CODE_OF_CONDUCT.md
COPYING
GIT-VERSION-GEN Start preparing for Git 2.46.2 2024-09-16 15:19:05 -07:00
INSTALL
LGPL-2.1
Makefile Merge branch 'ps/clar-unit-test' 2024-09-18 18:02:05 -07:00
README.md
RelNotes Start preparing for Git 2.46.2 2024-09-16 15:19:05 -07:00
SECURITY.md
abspath.c
abspath.h
aclocal.m4
add-interactive.c
add-interactive.h
add-patch.c Merge branch 'ps/config-wo-the-repository' 2024-08-23 09:02:34 -07:00
advice.c
advice.h
alias.c
alias.h
alloc.c
alloc.h
apply.c Merge branch 'jk/apply-patch-mode-check-fix' into maint-2.46 2024-09-12 11:02:15 -07:00
apply.h apply: support --ours, --theirs, and --union for three-way merges 2024-09-09 10:07:24 -07:00
archive-tar.c
archive-zip.c
archive.c builtin/upload-archive: fix leaking args passed to `write_archive()` 2024-08-22 09:18:04 -07:00
archive.h
attr.c
attr.h
banned.h
base85.c
base85.h
bisect.c Merge branch 'ps/pack-refs-auto-heuristics' 2024-09-12 11:47:23 -07:00
bisect.h
blame.c
blame.h
blob.c
blob.h
bloom.c
bloom.h
branch.c
branch.h
builtin.h
bulk-checkin.c bulk-checkin: fix leaking state TODO 2024-08-14 10:07:57 -07:00
bulk-checkin.h
bundle-uri.c fetch: add top-level trace2 regions 2024-08-22 15:02:31 -07:00
bundle-uri.h
bundle.c Merge branch 'ps/leakfixes-part-5' 2024-09-03 09:15:00 -07:00
bundle.h
cache-tree.c
cache-tree.h
cbtree.c
cbtree.h
chdir-notify.c
chdir-notify.h
check-builtins.sh
checkout.c
checkout.h
chunk-format.c
chunk-format.h
color.c
color.h
column.c
column.h
combine-diff.c
command-list.txt
commit-graph.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
commit-graph.h
commit-reach.c Merge branch 'ds/for-each-ref-is-base' 2024-08-26 11:32:24 -07:00
commit-reach.h commit-reach: add get_branch_base_for_tip 2024-08-14 10:10:05 -07:00
commit-slab-decl.h
commit-slab-impl.h
commit-slab.h
commit.c Merge branch 'ds/for-each-ref-is-base' 2024-08-26 11:32:24 -07:00
commit.h commit: add gentle reference lookup method 2024-08-14 10:10:05 -07:00
common-main.c
config.c Merge branch 'ps/maintenance-detach-fix' 2024-08-26 11:32:20 -07:00
config.h Merge branch 'ps/maintenance-detach-fix' 2024-08-26 11:32:20 -07:00
config.mak.dev config.mak.dev: enable -Wunused-parameter by default 2024-08-28 09:51:18 -07:00
config.mak.in
config.mak.uname Merge branch 'rj/cygwin-has-dev-tty' 2024-09-13 15:27:44 -07:00
configure.ac
connect.c global: prepare for hiding away repo-less config functions 2024-08-13 10:01:05 -07:00
connect.h
connected.c
connected.h
convert.c convert: fix leaks when resetting attributes 2024-08-22 09:18:03 -07:00
convert.h
copy.c
copy.h
credential.c global: prepare for hiding away repo-less config functions 2024-08-13 10:01:05 -07:00
credential.h
csum-file.c Merge branch 'ps/leakfixes-part-4' 2024-08-23 09:02:33 -07:00
csum-file.h Merge branch 'ps/leakfixes-part-4' 2024-08-23 09:02:33 -07:00
ctype.c
daemon.c Merge branch 'jk/mark-unused-parameters' 2024-08-26 11:32:23 -07:00
date.c
date.h
decorate.c
decorate.h
delta-islands.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
delta-islands.h
delta.h
detect-compiler
diagnose.c
diagnose.h
diff-delta.c
diff-lib.c diff-lib: drop unused index argument from get_stat_data() 2024-08-17 09:44:41 -07:00
diff-merges.c
diff-merges.h
diff-no-index.c remerge-diff: clean up temporary objdir at a central place 2024-08-09 15:42:40 -07:00
diff.c Merge branch 'jc/range-diff-lazy-setup' 2024-09-16 14:22:55 -07:00
diff.h Merge branch 'jc/range-diff-lazy-setup' 2024-09-16 14:22:55 -07:00
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c
diffcore-rename.c
diffcore-rotate.c
diffcore.h
dir-iterator.c
dir-iterator.h
dir.c
dir.h
editor.c global: prepare for hiding away repo-less config functions 2024-08-13 10:01:05 -07:00
editor.h editor: do not rely on `the_repository` for interactive edits 2024-08-13 10:01:00 -07:00
entry.c entry: fix leaking pathnames during delayed checkout 2024-08-01 08:47:37 -07:00
entry.h
environment.c config: fix leaking comment character config 2024-08-14 10:07:58 -07:00
environment.h config: fix leaking comment character config 2024-08-14 10:07:58 -07:00
exec-cmd.c exec_cmd: RUNTIME_PREFIX on z/OS systems 2024-08-22 08:58:46 -07:00
exec-cmd.h
fetch-negotiator.c
fetch-negotiator.h
fetch-pack.c drop trailing newline from warning/error/die messages 2024-09-05 09:07:12 -07:00
fetch-pack.h
fmt-merge-msg.c
fmt-merge-msg.h
fsck.c builtin/refs: add verify subcommand 2024-08-08 09:36:53 -07:00
fsck.h fsck: add ref name check for files backend 2024-08-08 09:36:53 -07:00
fsmonitor--daemon.h
fsmonitor-ipc.c
fsmonitor-ipc.h
fsmonitor-ll.h
fsmonitor-path-utils.h
fsmonitor-settings.c
fsmonitor-settings.h
fsmonitor.c global: prepare for hiding away repo-less config functions 2024-08-13 10:01:05 -07:00
fsmonitor.h
generate-cmdlist.sh
generate-configlist.sh
generate-hooklist.sh
gettext.c
gettext.h
git-archimport.perl
git-compat-util.h CodingGuidelines: also mention MAYBE_UNUSED 2024-08-29 11:28:07 -07:00
git-curl-compat.h
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl
git-difftool--helper.sh
git-filter-branch.sh
git-instaweb.sh
git-merge-octopus.sh
git-merge-one-file.sh
git-merge-resolve.sh
git-mergetool--lib.sh
git-mergetool.sh
git-p4.py
git-quiltimport.sh
git-request-pull.sh
git-send-email.perl Merge branch 'jk/send-email-mailmap' 2024-09-06 10:38:49 -07:00
git-sh-i18n.sh
git-sh-setup.sh
git-submodule.sh builtin/submodule: allow "add" to use different ref storage format 2024-08-08 09:22:21 -07:00
git-svn.perl git-svn: mention `svn:global-ignores` in help+docs 2024-08-14 15:10:24 -07:00
git-web--browse.sh
git-zlib.c
git-zlib.h
git.c git: fix leaking system paths 2024-08-14 10:07:56 -07:00
git.rc
gpg-interface.c global: prepare for hiding away repo-less config functions 2024-08-13 10:01:05 -07:00
gpg-interface.h
graph.c global: prepare for hiding away repo-less config functions 2024-08-13 10:01:05 -07:00
graph.h
grep.c grep: prefer UNUSED to MAYBE_UNUSED for pcre allocators 2024-08-29 13:59:46 -07:00
grep.h
hash-lookup.c
hash-lookup.h
hash.h
hashmap.c
hashmap.h
help.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
help.h
hex-ll.c
hex-ll.h
hex.c
hex.h
hook.c hooks: remove implicit dependency on `the_repository` 2024-08-13 10:01:01 -07:00
hook.h hooks: remove implicit dependency on `the_repository` 2024-08-13 10:01:01 -07:00
http-backend.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
http-fetch.c
http-push.c
http-walker.c
http.c http: do not ignore proxy path 2024-08-02 08:30:08 -07:00
http.h
ident.c
ident.h
imap-send.c Merge branch 'jk/mark-unused-parameters' 2024-08-26 11:32:23 -07:00
iterator.h
json-writer.c
json-writer.h
khash.h
kwset.c
kwset.h
levenshtein.c
levenshtein.h
line-log.c
line-log.h
line-range.c
line-range.h
linear-assignment.c
linear-assignment.h
list-objects-filter-options.c
list-objects-filter-options.h
list-objects-filter.c
list-objects-filter.h
list-objects.c
list-objects.h
list.h
lockfile.c
lockfile.h
log-tree.c Merge branch 'jc/range-diff-lazy-setup' 2024-09-16 14:22:55 -07:00
log-tree.h
loose.c drop trailing newline from warning/error/die messages 2024-09-05 09:07:12 -07:00
loose.h
ls-refs.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
ls-refs.h
mailinfo.c Merge branch 'jc/mailinfo-header-cleanup' 2024-09-12 11:47:22 -07:00
mailinfo.h
mailmap.c Merge branch 'jk/send-email-mailmap' 2024-09-06 10:38:49 -07:00
mailmap.h check-mailmap: add options for additional mailmap sources 2024-08-27 14:51:29 -07:00
match-trees.c
match-trees.h
mem-pool.c
mem-pool.h
merge-blobs.c
merge-blobs.h
merge-ll.c global: prepare for hiding away repo-less config functions 2024-08-13 10:01:05 -07:00
merge-ll.h
merge-ort-wrappers.c
merge-ort-wrappers.h
merge-ort.c merge-ort: unconditionally release attributes index 2024-08-14 10:08:00 -07:00
merge-ort.h
merge-recursive.c
merge-recursive.h
merge.c
merge.h
mergesort.h
midx-write.c Merge branch 'ps/leakfixes-part-5' 2024-09-03 09:15:00 -07:00
midx.c pack-bitmap: tag bitmapped packs with their corresponding MIDX 2024-08-27 14:50:26 -07:00
midx.h midx: implement support for writing incremental MIDX chains 2024-08-06 12:01:39 -07:00
name-hash.c
name-hash.h
notes-cache.c
notes-cache.h
notes-merge.c
notes-merge.h
notes-utils.c
notes-utils.h
notes.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
notes.h
object-file-convert.c
object-file-convert.h
object-file.c Merge branch 'ps/leakfixes-part-4' 2024-08-23 09:02:33 -07:00
object-file.h
object-name.c Merge branch 'ps/leakfixes-part-4' 2024-08-23 09:02:33 -07:00
object-name.h
object-store-ll.h
object-store.h
object.c object: fix leaking packfiles when closing object store 2024-08-08 09:22:21 -07:00
object.h
oid-array.c
oid-array.h
oidmap.c
oidmap.h
oidset.c
oidset.h
oidtree.c
oidtree.h
pack-bitmap-write.c Merge branch 'jk/drop-unused-parameters' 2024-08-26 11:32:22 -07:00
pack-bitmap.c pack-bitmap.c: avoid repeated `pack_pos_to_offset()` during reuse 2024-08-27 14:50:27 -07:00
pack-bitmap.h pack-bitmap: tag bitmapped packs with their corresponding MIDX 2024-08-27 14:50:26 -07:00
pack-check.c
pack-mtimes.c
pack-mtimes.h
pack-objects.c
pack-objects.h
pack-revindex.c
pack-revindex.h
pack-write.c
pack.h
packfile.c midx: implement support for writing incremental MIDX chains 2024-08-06 12:01:39 -07:00
packfile.h midx: implement support for writing incremental MIDX chains 2024-08-06 12:01:39 -07:00
pager.c rebase --exec: respect --quiet 2024-08-21 08:57:51 -07:00
pager.h
parallel-checkout.c global: prepare for hiding away repo-less config functions 2024-08-13 10:01:05 -07:00
parallel-checkout.h
parse-options-cb.c
parse-options.c
parse-options.h
parse.c
parse.h
patch-delta.c
patch-ids.c
patch-ids.h
path.c path: hide functions using `the_repository` by default 2024-08-13 10:01:01 -07:00
path.h path: hide functions using `the_repository` by default 2024-08-13 10:01:01 -07:00
pathspec.c
pathspec.h
pkt-line.c
pkt-line.h
preload-index.c
preload-index.h
pretty.c pretty: fix leaking key/value separator buffer 2024-08-22 09:18:04 -07:00
pretty.h
prio-queue.c
prio-queue.h
progress.c
progress.h
promisor-remote.c
promisor-remote.h
prompt.c
prompt.h
protocol-caps.c
protocol-caps.h
protocol.c global: prepare for hiding away repo-less config functions 2024-08-13 10:01:05 -07:00
protocol.h
prune-packed.c
prune-packed.h
pseudo-merge.c Merge branch 'jk/drop-unused-parameters' 2024-08-26 11:32:22 -07:00
pseudo-merge.h pack-bitmap: drop unused parameters from select_pseudo_merges() 2024-08-17 09:44:41 -07:00
quote.c
quote.h
range-diff.c userdiff: fix leaking memory for configured diff drivers 2024-08-14 10:08:01 -07:00
range-diff.h
reachable.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
reachable.h
read-cache-ll.h
read-cache.c Merge branch 'ps/maintenance-detach-fix' 2024-08-26 11:32:20 -07:00
read-cache.h
rebase-interactive.c
rebase-interactive.h
rebase.c
rebase.h
ref-filter.c ref-filter: fix leak with unterminated %(if) atoms 2024-09-10 09:26:13 -07:00
ref-filter.h ref-filter: add ref_format_clear() function 2024-09-09 16:26:11 -07:00
reflog-walk.c
reflog-walk.h
reflog.c Merge branch 'jc/reflog-expire-lookup-commit-fix' into maint-2.46 2024-08-26 11:10:21 -07:00
reflog.h
refs.c Merge branch 'jk/mark-unused-parameters' 2024-08-26 11:32:23 -07:00
refs.h Merge branch 'sj/ref-fsck' 2024-08-16 12:51:51 -07:00
refspec.c
refspec.h
remote-curl.c
remote.c ref-filter: fix leak when formatting %(push:remoteref) 2024-09-09 16:26:10 -07:00
remote.h ref-filter: fix leak when formatting %(push:remoteref) 2024-09-09 16:26:10 -07:00
replace-object.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
replace-object.h
repo-settings.c
repository.c
repository.h
rerere.c Merge branch 'ps/config-wo-the-repository' 2024-08-23 09:02:34 -07:00
rerere.h
reset.c hooks: remove implicit dependency on `the_repository` 2024-08-13 10:01:01 -07:00
reset.h
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'jk/free-commit-buffer-of-skipped-commits' into maint-2.46 2024-09-13 15:26:49 -07:00
revision.h
run-command.c run-command: fix detaching when running auto maintenance 2024-08-16 09:46:26 -07:00
run-command.h
sane-ctype.h
scalar.c scalar: add --no-tags option to 'scalar clone' 2024-09-06 14:13:48 -07:00
send-pack.c drop trailing newline from warning/error/die messages 2024-09-05 09:07:12 -07:00
send-pack.h
sequencer.c Merge branch 'mt/rebase-x-quiet' 2024-08-28 10:31:26 -07:00
sequencer.h
serve.c drop trailing newline from warning/error/die messages 2024-09-05 09:07:12 -07:00
serve.h
server-info.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
server-info.h
setup.c Merge branch 'jk/mark-unused-parameters' 2024-08-26 11:32:23 -07:00
setup.h
sh-i18n--envsubst.c
sha1dc_git.c
sha1dc_git.h
shallow.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
shallow.h
shared.mak
shell.c
shortlog.h
sideband.c Merge branch 'ps/leakfixes-part-5' 2024-09-03 09:15:00 -07:00
sideband.h
sigchain.c
sigchain.h
simple-ipc.h
sparse-index.c
sparse-index.h
split-index.c
split-index.h
stable-qsort.c
statinfo.c
statinfo.h
strbuf.c
strbuf.h
streaming.c
streaming.h
string-list.c
string-list.h
strmap.c
strmap.h
strvec.c
strvec.h
sub-process.c
sub-process.h
submodule-config.c submodule-config: fix leaking name entry when traversing submodules 2024-08-14 10:07:58 -07:00
submodule-config.h
submodule.c Merge branch 'ps/config-wo-the-repository' 2024-08-23 09:02:34 -07:00
submodule.h
symlinks.c
symlinks.h
tag.c
tag.h
tar.h
tempfile.c
tempfile.h
thread-utils.c
thread-utils.h
tmp-objdir.c
tmp-objdir.h
trace.c
trace.h
trace2.c
trace2.h
trailer.c global: prepare for hiding away repo-less config functions 2024-08-13 10:01:05 -07:00
trailer.h
transport-helper.c
transport-internal.h
transport.c Merge branch 'ps/leakfixes-part-5' 2024-09-03 09:15:00 -07:00
transport.h
tree-diff.c
tree-walk.c
tree-walk.h
tree.c
tree.h
unicode-width.h
unimplemented.sh
unix-socket.c
unix-socket.h
unix-stream-server.c
unix-stream-server.h
unpack-trees.c unpack-trees: clear index when not propagating it 2024-08-14 10:08:00 -07:00
unpack-trees.h
upload-pack.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
upload-pack.h
url.c
url.h
urlmatch.c
urlmatch.h
usage.c
userdiff.c userdiff: fix leaking memory for configured diff drivers 2024-08-14 10:08:01 -07:00
userdiff.h userdiff: fix leaking memory for configured diff drivers 2024-08-14 10:08:01 -07:00
utf8.c
utf8.h
varint.c
varint.h
version.c
version.h
versioncmp.c global: prepare for hiding away repo-less config functions 2024-08-13 10:01:05 -07:00
versioncmp.h
walker.c refs: add referent to each_ref_fn 2024-08-09 08:47:34 -07:00
walker.h
wildmatch.c
wildmatch.h
worktree.c Merge branch 'ps/config-wo-the-repository' 2024-08-23 09:02:34 -07:00
worktree.h
wrap-for-bin.sh
wrapper.c
wrapper.h wrapper: introduce `log2u()` 2024-09-04 08:03:24 -07:00
write-or-die.c
write-or-die.h
ws.c
ws.h
wt-status.c Merge branch 'jc/range-diff-lazy-setup' 2024-09-16 14:22:55 -07:00
wt-status.h
xdiff-interface.c
xdiff-interface.h

README.md

Build status

Git - fast, scalable, distributed revision control system

Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.

Git is an Open Source project covered by the GNU General Public License version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.

Please read the file INSTALL for installation instructions.

Many Git online resources are accessible from https://git-scm.com/ including full documentation and Git related tools.

See Documentation/gittutorial.txt to get started, then see Documentation/giteveryday.txt for a useful minimum set of commands, and Documentation/git-<commandname>.txt for documentation of each command. If git has been correctly installed, then the tutorial can also be read with man gittutorial or git help tutorial, and the documentation of each command with man git-<commandname> or git help <commandname>.

CVS users may also want to read Documentation/gitcvs-migration.txt (man gitcvs-migration or git help cvs-migration if git is installed).

The user discussion and development of Git take place on the Git mailing list -- everyone is welcome to post bug reports, feature requests, comments and patches to git@vger.kernel.org (read Documentation/SubmittingPatches for instructions on patch submission and Documentation/CodingGuidelines).

Those wishing to help with error message, usage and informational message string translations (localization l10) should see po/README.md (a po file is a Portable Object file that holds the translations).

To subscribe to the list, send an email to git+subscribe@vger.kernel.org (see https://subspace.kernel.org/subscribing.html for details). The mailing list archives are available at https://lore.kernel.org/git/, https://marc.info/?l=git and other archival sites.

Issues which are security relevant should be disclosed privately to the Git Security mailing list git-security@googlegroups.com.

The maintainer frequently sends the "What's cooking" reports that list the current status of various development topics to the mailing list. The discussion following them give a good reference for project status, development direction and remaining tasks.

The name "git" was given by Linus Torvalds when he wrote the very first version. He described the tool as "the stupid content tracker" and the name as (depending on your mood):

  • random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of "get" may or may not be relevant.
  • stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
  • "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
  • "goddamn idiotic truckload of sh*t": when it breaks