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Jeff King 1dca155fe3 log: handle integer overflow in timestamps 
If an ident line has a ridiculous date value like (2^64)+1,
we currently just pass ULONG_MAX along to the date code,
which can produce nonsensical dates.

On systems with a signed long time_t (e.g., 64-bit glibc
systems), this actually doesn't end up too bad. The
ULONG_MAX is converted to -1, we apply the timezone field to
that, and the result ends up somewhere between Dec 31, 1969
and Jan 1, 1970.

However, there is still a few good reasons to detect the
overflow explicitly:

  1. On systems where "unsigned long" is smaller than
     time_t, we get a nonsensical date in the future.

  2. Even where it would produce "Dec 31, 1969", it's easier
     to recognize "midnight Jan 1" as a consistent sentinel
     value for "we could not parse this".

  3.  Values which do not overflow strtoul but do overflow a
      signed time_t produce nonsensical values in the past.
      For example, on a 64-bit system with a signed long
      time_t, a timestamp of 18446744073000000000 produces a
      date in 1947.

We also recognize overflow in the timezone field, which
could produce nonsensical results. In this case we show the
parsed date, but in UTC.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-02-24 10:12:58 -08:00
block-sha1
builtin Merge branch 'tr/remote-tighten-commandline-parsing' into maint 2013-05-03 15:12:38 -07:00
compat precompose-utf8: fix spelling of "want" in error message 2013-04-12 12:24:04 -07:00
contrib completion: zsh: don't override suffix on _detault 2013-05-03 15:10:05 -07:00
Documentation Documentation/git-merge.txt: fix formatting of example block 2013-09-05 10:50:49 -07:00
git_remote_helpers git_remote_helpers: remove GIT-PYTHON-VERSION upon "clean" 2013-01-30 12:34:55 -08:00
git-gui git-gui 0.17.0 2012-10-17 15:55:46 -07:00
gitk-git Merge git://ozlabs.org/~paulus/gitk 2013-01-30 13:52:44 -08:00
gitweb gitweb/INSTALL: Simplify description of GITWEB_CONFIG_SYSTEM 2013-04-15 07:25:46 -07:00
mergetools mergetools/kdiff3: do not use --auto when diffing 2013-05-09 11:59:39 -07:00
perl Merge branch 'tr/perl-keep-stderr-open' into maint 2013-04-22 11:26:55 -07:00
po doc: various spelling fixes 2013-04-12 12:00:52 -07:00
ppc
t log: handle integer overflow in timestamps 2014-02-24 10:12:58 -08:00
templates fix shell syntax error in template 2013-08-30 09:56:30 -07:00
vcs-svn remote-svn: add incremental import 2012-10-07 14:10:17 -07:00
xdiff Correct common spelling mistakes in comments and tests 2013-04-12 13:38:40 -07:00
.gitattributes
.gitignore gitk: Ignore gitk-wish buildproduct 2013-01-30 21:12:16 +11:00
.mailmap mailmap: update Pasky's address 2013-04-04 13:03:34 -07:00
abspath.c Introduce new function real_path_if_valid() 2012-10-29 02:34:58 -04:00
aclocal.m4
advice.c Merge branch 'tb/document-status-u-tradeoff' into maint 2013-04-01 09:19:30 -07:00
advice.h Merge branch 'tb/document-status-u-tradeoff' into maint 2013-04-01 09:19:30 -07:00
alias.c
alloc.c
archive-tar.c archive-tar: use parse_config_key when parsing config 2013-01-23 08:41:50 -08:00
archive-zip.c archive-zip: fix compressed size for stored export-subst files 2013-02-27 07:38:32 -08:00
archive.c archive: handle commits with an empty tree 2013-03-10 22:25:22 -07:00
archive.h
argv-array.c Merge branch 'fa/remote-svn' 2012-10-25 06:42:02 -04:00
argv-array.h Merge branch 'fa/remote-svn' 2012-10-25 06:42:02 -04:00
attr.c Sync with 1.8.1.6 2013-04-07 13:17:50 -07:00
attr.h
base85.c
bisect.c Merge branch 'jk/bisect-prn-unsigned' into maint 2013-04-12 13:41:46 -07:00
bisect.h Move print_commit_list to libgit.a 2012-10-29 03:08:30 -04:00
blob.c
blob.h
branch.c
branch.h
builtin.h Merge branch 'as/check-ignore' 2013-01-23 21:19:10 -08:00
bulk-checkin.c
bulk-checkin.h
bundle.c bundle: Accept prerequisites without commit messages 2013-04-07 14:45:56 -07:00
bundle.h
cache-tree.c cache-tree: invalidate i-t-a paths after generating trees 2012-12-15 23:04:22 -08:00
cache-tree.h cache-tree: fix writing cache-tree when CE_REMOVE is present 2012-12-15 23:04:22 -08:00
cache.h date: check date overflow against time_t 2014-02-24 10:12:58 -08:00
check_bindir
check-builtins.sh
check-racy.c
color.c
color.h
column.c
column.h
combine-diff.c Allow combined diff to ignore white-spaces 2013-03-14 14:43:34 -07:00
command-list.txt Merge branch 'as/check-ignore' 2013-01-23 21:19:10 -08:00
commit.c Correct common spelling mistakes in comments and tests 2013-04-12 13:38:40 -07:00
commit.h Correct common spelling mistakes in comments and tests 2013-04-12 13:38:40 -07:00
config.c Merge branch 'jk/config-parsing-cleanup' 2013-02-04 10:24:50 -08:00
config.mak.in Merge branch 'ct/autoconf-htmldir' 2013-02-25 08:27:04 -08:00
config.mak.uname Revert "compat: add strtok_r()" 2013-02-26 09:16:58 -08:00
configure.ac Revert "compat: add strtok_r()" 2013-02-26 09:16:58 -08:00
connect.c
connected.c
connected.h
convert.c convert some config callbacks to parse_config_key 2013-01-23 08:41:50 -08:00
convert.h
copy.c
COPYING
credential-cache--daemon.c
credential-cache.c
credential-store.c
credential.c
credential.h
csum-file.c
csum-file.h
ctype.c ctype: support iscntrl, ispunct, isxdigit and isprint 2012-10-15 14:58:16 -07:00
daemon.c Merge branch 'dm/ni-maxhost-may-be-missing' into maint-1.8.1 2013-03-25 13:45:42 -07:00
date.c date: check date overflow against time_t 2014-02-24 10:12:58 -08:00
decorate.c
decorate.h
delta.h
diff-delta.c
diff-lib.c
diff-no-index.c
diff.c Merge branch 'jk/diff-algo-finishing-touches' into maint 2013-04-24 16:19:42 -07:00
diff.h Merge branch 'mp/diff-algo-config' 2013-02-17 15:25:52 -08:00
diffcore-break.c diffcore-break: don't divide by zero 2013-04-03 12:48:02 -07:00
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c diffcore-pickaxe: unify code for log -S/-G 2013-04-05 10:31:09 -07:00
diffcore-rename.c
diffcore.h
dir.c Sync with 1.8.1.6 2013-04-07 13:17:50 -07:00
dir.h Merge branch 'as/check-ignore' 2013-01-23 21:19:10 -08:00
editor.c run-command: encode signal death as a positive integer 2013-01-06 11:09:18 -08:00
entry.c Merge branch 'jk/checkout-attribute-lookup' into maint-1.8.1 2013-04-03 08:43:40 -07:00
environment.c Merge branch 'jk/alias-in-bare' into maint 2013-04-03 09:25:41 -07:00
exec_cmd.c
exec_cmd.h
fast-import.c fast-import: Fix an gcc -Wuninitialized warning 2013-03-29 23:46:55 -07:00
fetch-pack.c Merge branch 'jk/gc-auto-after-fetch' 2013-02-01 12:40:16 -08:00
fetch-pack.h
fixup-builtins
fmt-merge-msg.h
fsck.c date: check date overflow against time_t 2014-02-24 10:12:58 -08:00
fsck.h
generate-cmdlist.sh
gettext.c
gettext.h
git-add--interactive.perl Correct common spelling mistakes in comments and tests 2013-04-12 13:38:40 -07:00
git-am.sh Merge branch 'jc/fake-ancestor-with-non-blobs' into maint 2013-02-07 15:14:22 -08:00
git-archimport.perl git-archimport: use a lowercase "usage:" string 2013-02-24 13:31:06 -08:00
git-bisect.sh
git-compat-util.h Merge branch 'jk/a-thread-only-dies-once' into maint 2013-04-26 11:25:59 -07:00
git-cvsexportcommit.perl git-cvsexportcommit: use a lowercase "usage:" string 2013-02-24 13:31:07 -08:00
git-cvsimport.perl git-cvsimport: use a lowercase "usage:" string 2013-02-24 13:31:07 -08:00
git-cvsserver.perl Correct common spelling mistakes in comments and tests 2013-04-12 13:38:40 -07:00
git-difftool--helper.sh difftool--helper: fix printf usage 2013-02-10 11:35:50 -08:00
git-difftool.perl git-difftool: use git-mergetool--lib for "--tool-help" 2013-01-25 11:08:55 -08:00
git-filter-branch.sh Merge branch 'jk/filter-branch-come-back-to-original' into maint 2013-04-22 11:26:55 -07:00
git-instaweb.sh
git-lost-found.sh
git-merge-octopus.sh
git-merge-one-file.sh git-merge-one-file: use a lowercase "usage:" string 2013-02-24 13:31:06 -08:00
git-merge-resolve.sh
git-mergetool--lib.sh doc: generate a list of valid merge tools 2013-02-02 21:46:52 -08:00
git-mergetool.sh Merge branch 'al/mergetool-printf-fix' 2013-02-14 10:29:37 -08:00
git-p4.py Merge branch 'pw/git-p4-on-cygwin' 2013-02-04 10:25:30 -08:00
git-parse-remote.sh push/pull: adjust missing upstream help text to changed interface 2012-11-08 11:32:38 -05:00
git-pull.sh pull: Apply -q and -v options to rebase mode as well 2013-03-16 23:30:08 -07:00
git-quiltimport.sh Correct common spelling mistakes in comments and tests 2013-04-12 13:38:40 -07:00
git-rebase--am.sh rebase: Handle cases where format-patch fails 2012-10-11 11:54:49 -07:00
git-rebase--interactive.sh Merge branch 'jk/rebase-i-comment-char' 2013-02-17 15:25:20 -08:00
git-rebase--merge.sh
git-rebase.sh
git-relink.perl git-relink: use a lowercase "usage:" string 2013-02-24 13:31:06 -08:00
git-remote-testgit remote-testgit: implement the "done" feature manually 2012-11-29 12:18:45 -08:00
git-remote-testpy.py git-remote-testpy: fix path hashing on Python 3 2013-01-28 09:55:14 -08:00
git-repack.sh
git-request-pull.sh
git-send-email.perl send-email: use the three-arg form of open in recipients_cmd 2013-03-31 21:30:27 -07:00
git-sh-i18n.sh
git-sh-setup.sh git-sh-setup: use a lowercase "usage:" string 2013-02-24 13:31:05 -08:00
git-stash.sh
git-submodule.sh submodule summary: support --summary-limit=<n> 2013-04-01 07:37:34 -07:00
git-svn.perl git-svn: use a lowercase "usage:" string 2013-02-24 21:30:03 -08:00
GIT-VERSION-GEN Git 1.8.2.3 2013-05-09 13:31:17 -07:00
git-web--browse.sh
git.c Merge branch 'jk/alias-in-bare' into maint 2013-04-03 09:25:41 -07:00
git.spec.in
gpg-interface.c Merge branch 'mg/gpg-interface-using-status' into maint 2013-04-03 09:26:27 -07:00
gpg-interface.h gpg_interface: allow to request status return 2013-02-14 09:30:04 -08:00
graph.c Revert "graph.c: mark private file-scope symbols as static" 2013-03-03 19:43:54 -08:00
graph.h Revert "graph.c: mark private file-scope symbols as static" 2013-03-03 19:43:54 -08:00
grep.c fix clang -Wtautological-compare with unsigned enum 2013-02-25 07:35:55 -08:00
grep.h fix clang -Wtautological-compare with unsigned enum 2013-02-25 07:35:55 -08:00
hash.c
hash.h
help.c help.c: add a compatibility comment to cmd_version() 2013-04-16 15:01:30 -07:00
help.h
hex.c
http-backend.c
http-fetch.c
http-push.c Allow building with xmlparse.h 2013-02-11 14:33:04 -08:00
http-walker.c
http.c http_request: reset "type" strbuf before adding 2013-02-06 07:50:56 -08:00
http.h Verify Content-Type from smart HTTP servers 2013-02-04 10:22:36 -08:00
ident.c Merge branch 'jn/do-not-drop-username-when-reading-from-etc-mailname' into maint 2013-02-04 10:04:26 -08:00
imap-send.c Merge branch 'ob/imap-send-ssl-verify' into maint-1.8.1 2013-04-03 08:35:33 -07:00
INSTALL Typo fix: replacing it's -> its 2013-04-11 17:39:05 -07:00
kwset.c kwset: fix spelling in comments 2013-04-12 12:25:08 -07:00
kwset.h
levenshtein.c
levenshtein.h
LGPL-2.1
list-objects.c
list-objects.h
ll-merge.c convert some config callbacks to parse_config_key 2013-01-23 08:41:50 -08:00
ll-merge.h
lockfile.c
log-tree.c Merge branch 'mg/gpg-interface-using-status' into maint 2013-04-03 09:26:27 -07:00
log-tree.h get_patch_filename(): split into two functions 2012-12-21 23:55:40 -08:00
mailmap.c Merge branch 'ap/log-mailmap' 2013-01-20 17:06:53 -08:00
mailmap.h mailmap: simplify map_user() interface 2013-01-10 12:33:08 -08:00
Makefile Merge branch 'maint' 2013-03-17 00:11:11 -07:00
match-trees.c match-trees: simplify score_trees() using tree_entry() 2013-03-25 09:00:30 -07:00
merge-blobs.c Which merge_file() function do you mean? 2012-12-09 23:05:27 -08:00
merge-blobs.h Which merge_file() function do you mean? 2012-12-09 23:05:27 -08:00
merge-recursive.c diff: Introduce --diff-algorithm command line option 2013-01-16 09:41:18 -08:00
merge-recursive.h Move try_merge_command and checkout_fast_forward to libgit.a 2012-10-29 03:08:30 -04:00
merge.c Move try_merge_command and checkout_fast_forward to libgit.a 2012-10-29 03:08:30 -04:00
mergesort.c
mergesort.h
name-hash.c Sync with 1.8.1 maintenance track 2013-04-03 09:18:01 -07:00
notes-cache.c
notes-cache.h
notes-merge.c
notes-merge.h
notes.c Merge branch 'jc/same-encoding' into maint 2012-12-07 14:10:56 -08:00
notes.h format_note(): simplify API 2012-10-17 22:42:40 -07:00
object.c avoid segfaults on parse_object failure 2013-03-17 12:49:03 -07:00
object.h avoid segfaults on parse_object failure 2013-03-17 12:49:03 -07:00
pack-check.c
pack-refs.c pack-refs: add fully-peeled trait 2013-03-18 08:06:28 -07:00
pack-refs.h
pack-revindex.c
pack-revindex.h
pack-write.c
pack.h
pager.c Move setup_diff_pager to libgit.a 2012-10-29 03:08:30 -04:00
parse-options-cb.c
parse-options.c Merge branch 'ef/non-ascii-parse-options-error-diag' into maint 2013-02-27 10:04:26 -08:00
parse-options.h fix clang -Wunused-value warnings for error functions 2013-01-16 12:47:46 -08:00
patch-delta.c
patch-ids.c
patch-ids.h
path.c longest_ancestor_length(): require prefix list entries to be normalized 2012-10-29 02:34:58 -04:00
pathspec.c add.c: extract new die_if_path_beyond_symlink() for reuse 2013-01-06 14:26:37 -08:00
pathspec.h add.c: extract new die_if_path_beyond_symlink() for reuse 2013-01-06 14:26:37 -08:00
pkt-line.c
pkt-line.h
preload-index.c
pretty.c log: handle integer overflow in timestamps 2014-02-24 10:12:58 -08:00
progress.c
progress.h
prompt.c
prompt.h
quote.c
quote.h
reachable.c use parse_object_or_die instead of die("bad object") 2013-03-17 12:52:14 -07:00
reachable.h
read-cache.c Sync with 1.8.1 maintenance track 2013-04-03 09:18:01 -07:00
README Merge branch 'ta/doc-no-small-caps' 2013-02-05 16:13:32 -08:00
reflog-walk.c
reflog-walk.h
refs.c Sync with 1.8.1 maintenance track 2013-04-03 09:18:01 -07:00
refs.h upload/receive-pack: allow hiding ref hierarchies 2013-02-07 13:48:47 -08:00
RelNotes Git 1.8.2.3 2013-05-09 13:31:17 -07:00
remote-curl.c Verify Content-Type from smart HTTP servers 2013-02-04 10:22:36 -08:00
remote-testsvn.c remote-testsvn: fix unitialized variable 2012-12-15 10:43:11 -08:00
remote.c Merge branch 'jc/push-reject-reasons' 2013-02-04 10:25:04 -08:00
remote.h
replace_object.c
rerere.c rerere forget: do not segfault if not all stages are present 2013-04-04 12:27:28 -07:00
rerere.h
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'tr/copy-revisions-from-stdin' into maint 2013-05-09 12:42:17 -07:00
revision.h Merge branch 'ap/log-mailmap' 2013-01-20 17:06:53 -08:00
run-command.c Merge branch 'jk/a-thread-only-dies-once' into maint 2013-04-26 11:25:59 -07:00
run-command.h hooks: Add function to check if a hook exists 2013-01-14 09:25:40 -08:00
send-pack.c push: introduce REJECT_FETCH_FIRST and REJECT_NEEDS_FORCE 2013-01-24 14:37:23 -08:00
send-pack.h
sequencer.c Correct common spelling mistakes in comments and tests 2013-04-12 13:38:40 -07:00
sequencer.h Merge branch 'jc/make-static' 2012-09-18 14:37:46 -07:00
server-info.c
setup.c Merge branch 'jk/alias-in-bare' into maint 2013-04-03 09:25:41 -07:00
sh-i18n--envsubst.c
sha1_file.c link_alt_odb_entries(): take (char *, len) rather than two pointers 2012-11-08 12:06:53 -05:00
sha1_name.c sha1_name: pass object name length to diagnose_invalid_sha1_path() 2013-03-17 00:10:51 -07:00
sha1-array.c
sha1-array.h
sha1-lookup.c
sha1-lookup.h
shallow.c upload-pack: fix off-by-one depth calculation in shallow clone 2013-01-11 09:10:57 -08:00
shell.c
shortlog.h
show-index.c
sideband.c
sideband.h
sigchain.c
sigchain.h
strbuf.c Allow custom "comment char" 2013-01-16 12:48:22 -08:00
strbuf.h Allow custom "comment char" 2013-01-16 12:48:22 -08:00
streaming.c
streaming.h
string-list.c Merge branch 'mh/ceiling' into maint 2013-01-28 11:07:18 -08:00
string-list.h Merge branch 'mh/ceiling' into maint 2013-01-28 11:07:18 -08:00
submodule.c submodule: clarify logic in show_submodule_summary 2013-03-22 14:09:55 -07:00
submodule.h submodule: display summary header in bold 2012-11-18 19:18:13 -08:00
symlinks.c
tag.c
tag.h
tar.h
test-chmtime.c tests: use a lowercase "usage:" string 2013-02-24 21:30:10 -08:00
test-ctype.c
test-date.c
test-delta.c tests: use a lowercase "usage:" string 2013-02-24 21:30:10 -08:00
test-dump-cache-tree.c
test-genrandom.c tests: use a lowercase "usage:" string 2013-02-24 21:30:10 -08:00
test-index-version.c
test-line-buffer.c
test-match-trees.c
test-mergesort.c
test-mktemp.c
test-parse-options.c
test-path-utils.c longest_ancestor_length(): require prefix list entries to be normalized 2012-10-29 02:34:58 -04:00
test-regex.c
test-revision-walking.c
test-run-command.c
test-scrap-cache-tree.c
test-sha1.c
test-sha1.sh
test-sigchain.c
test-string-list.c string_list_longest_prefix(): remove function 2012-10-29 02:34:58 -04:00
test-subprocess.c
test-svn-fe.c remote-svn: add incremental import 2012-10-07 14:10:17 -07:00
test-wildmatch.c Makefile: add USE_WILDMATCH to use wildmatch as fnmatch 2013-01-01 15:32:37 -08:00
thread-utils.c
thread-utils.h
trace.c
transport-helper.c transport-helper: trivial style cleanup 2013-05-09 11:33:01 -07:00
transport.c transport.c: help gcc 4.6.3 users by squelching compiler warning 2013-03-25 12:51:50 -07:00
transport.h Correct common spelling mistakes in comments and tests 2013-04-12 13:38:40 -07:00
tree-diff.c
tree-walk.c tree_entry_interesting: do basedir compare on wildcard patterns when possible 2012-11-26 11:16:34 -08:00
tree-walk.h
tree.c
tree.h
unimplemented.sh
unix-socket.c
unix-socket.h
unpack-trees.c Merge branch 'as/check-ignore' 2013-01-23 21:19:10 -08:00
unpack-trees.h
upload-pack.c Merge branch 'jk/peel-ref' into maint 2013-04-04 12:59:55 -07:00
url.c
url.h
usage.c Merge branch 'jk/a-thread-only-dies-once' into maint 2013-04-26 11:25:59 -07:00
userdiff.c userdiff: drop parse_driver function 2013-01-23 08:41:51 -08:00
userdiff.h
utf8.c Merge branch 'ks/rfc2047-one-char-at-a-time' into maint 2013-04-03 09:25:29 -07:00
utf8.h Merge branch 'ks/rfc2047-one-char-at-a-time' into maint 2013-04-03 09:25:29 -07:00
varint.c
varint.h
version.c
version.h
walker.c
walker.h
wildmatch.c wildmatch: advance faster in <asterisk> + <literal> patterns 2013-01-01 15:32:37 -08:00
wildmatch.h wildmatch: support "no FNM_PATHNAME" mode 2013-01-01 15:32:37 -08:00
wrap-for-bin.sh
wrapper.c Merge branch 'jn/warn-on-inaccessible-loosen' into maint 2013-01-11 16:47:07 -08:00
write_or_die.c maybe_flush_or_die: move a too-loose Windows specific error 2012-10-17 00:33:42 -07:00
ws.c
wt-status.c Merge branch 'tb/document-status-u-tradeoff' into maint 2013-04-12 08:12:47 -07:00
wt-status.h Merge branch 'tb/document-status-u-tradeoff' into maint 2013-04-01 09:19:30 -07:00
xdiff-interface.c
xdiff-interface.h
zlib.c

README 

////////////////////////////////////////////////////////////////

	Git - the stupid content tracker

////////////////////////////////////////////////////////////////

"git" can mean anything, 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

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.

See Documentation/gittutorial.txt to get started, then see
Documentation/everyday.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).

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

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).
To subscribe to the list, send an email with just "subscribe git" in
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