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The hashmap API always use an unsigned value for storing
and comparing hashes. Whereas this test code uses "int".
This works out in practice since one can typically
round-trip between "int" and "unsigned int". But since this
is essentially reference code for the hashmap API, we should
model using the correct types.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This function takes two ptr/len pairs, which implies that
they can be arbitrary buffers. But internally, it assumes
that each "ptr" is NUL-terminated at "len" (because we
memcpy an extra byte to pick up the NUL terminator).
In practice this works because each caller only ever passes
strlen(ptr) as the length. But let's drop the "len"
parameters to make our expectations clear.
Note that we can get rid of the "l1" and "l2" variables from
cmd_main() as a further cleanup, since they are now mostly
used to check whether the p1 and p2 arguments are present
(technically the length parameters conflated NULL with the
empty string, which we no longer do, but I think that is
actually an improvement).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Using fgets() with a fixed-size buffer can lead to lines
being accidentally split across two calls if they are larger
than the buffer size.
As this is just a test helper, this is unlikely to be a
problem in practice. But since people may look at test
helpers as reference code, it's a good idea for them to
model the preferred behavior.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In general, using a bare snprintf can truncate the resulting
buffer, leading to confusing results. In this case we know
that our buffer is sized large enough to accommodate our
loop, so there's no bug. However, we should use xsnprintf()
to document (and check) that assumption, and to model good
practice to people reading the code.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When we allocate the test_entry flex-struct, we have to add
up all of the elements that go into the flex array. If these
were to overflow a size_t, this would allocate a too-small
buffer, which we would then overflow in our memcpy steps.
Since this is just a test-helper, it probably doesn't matter
in practice, but we should model the correct technique by
using the st_add() macros.
Unfortunately, we cannot use the FLEX_ALLOC() macros here,
because we are stuffing two different buffers into a single
flex array.
While we're here, let's also swap out "malloc" for our
error-checking "xmalloc", and use the preferred
"sizeof(*var)" instead of "sizeof(type)".
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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These two array allocations have several minor flaws:
- they use bare malloc, rather than our error-checking
xmalloc
- they do a bare multiplication to determine the total
size (which in theory can overflow, though in this case
the sizes are all constants)
- they use sizeof(type), but the type in the second one
doesn't match the actual array (though it's "int" versus
"unsigned int", which are guaranteed by C99 to have the
same size)
None of these are likely to be problems in practice, and
this is just a test helper. But since people often look at
test helpers as reference code, we should do our best to
model the recommended techniques.
Switching to ALLOC_ARRAY fixes all three.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Clarify and enhance documentation for "merge-base --fork-point", as
it was clear what it computed but not why/what for.
* jc/merge-base-fork-point-doc:
merge-base --fork-point doc: clarify the example and failure modes
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The illustrated history used to explain the `--fork-point` mode
named three keypoint commits B3, B2 and B1 from the oldest to the
newest, which was hard to read. Relabel them to B0, B1, B2. Also
illustrate the history after the rebase using the `--fork-point`
facility was made.
The text already mentions use of reflog, but the description is not
clear what benefit we are trying to gain by using reflog. Clarify
that it is to find the commits that were known to be at the tip of
the remote-tracking branch. This in turn necessitates users to know
the ramifications of the underlying assumptions, namely, expiry of
reflog entries will make it impossible to determine which commits
were at the tip of the remote-tracking branches and we fail when in
doubt (instead of giving a random and incorrect result without even
warning). Another limitation is that it won't be useful if you did
not fork from the tip of a remote-tracking branch but from in the
middle.
Describe them.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A few scripts (both in production and tests) incorrectly redirected
their error output. These have been corrected.
* tz/redirect-fix:
rebase: fix stderr redirect in apply_autostash()
t/lib-gpg: fix gpgconf stderr redirect to /dev/null
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The intention is to ignore all output from the 'git stash apply' call.
Adjust the order of the redirection to ensure that both stdout and
stderr are redirected to /dev/null.
Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In 29ff1f8f74 (t: lib-gpg: flush gpg agent on startup, 2017-07-20), a
call to gpgconf was added to kill the gpg-agent. The intention was to
ignore all output from the call, but the order of the redirection needs
to be switched to ensure that both stdout and stderr are redirected to
/dev/null. Without this, gpgconf from gnupg-2.0 releases would output
'gpgconf: invalid option "--kill"' each time it was called.
Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git notes" sent its error message to its standard output stream,
which was corrected.
* tz/notes-error-to-stderr:
notes: send "Automatic notes merge failed" messages to stderr
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All other error messages from notes use stderr. Do the same when
alerting users of an unresolved notes merge.
Fix the output redirection in t3310 and t3320 as well. Previously, the
tests directed output to a file, but stderr was either not captured or
not sent to the file due to the order of the redirection operators.
Signed-off-by: Todd Zullinger <tmz@pobox.com>
Acked-by: Johan Herland <johan@herland.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The three-way merge performed by "git cherry-pick" was confused
when a new submodule was added in the meantime, which has been
fixed (or "papered over").
* sb/test-cherry-pick-submodule-getting-in-a-way:
merge-recursive: handle addition of submodule on our side of history
t/3512: demonstrate unrelated submodule/file conflict as cherry-pick failure
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The code for a newly added path assumed that the path was a normal file,
and thus checked for there being a directory still being in the way of
the file. Note that since unpack_trees() does path-in-the-way checks
already, the only way for there to be a directory in the way at this
point in the code, is if there is some kind of D/F conflict in the merge.
For a submodule addition on HEAD's side of history, the submodule would
have already been present. This means that we do expect there to be a
directory present but should not consider it to be "in the way"; instead,
it's the expected submodule. So, when there's a submodule addition from
HEAD's side, don't bother checking the working copy for a directory in
the way.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The sequencer machinery (used by "git cherry-pick A..B", and "git
rebase -i", among other things) would have lost a commit if stopped
due to an unlockable index file, which has been fixed.
* pw/sequencer-recover-from-unlockable-index:
sequencer: reschedule pick if index can't be locked
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If the index cannot be locked in do_recursive_merge(), issue an
error message and go on to the error recovery codepath, instead of
dying. When the commit cannot be picked, it needs to be rescheduled
when performing an interactive rebase, but just dying there won't
allow that to happen, and when the user runs 'git rebase --continue'
rather than 'git rebase --abort', the commit gets silently dropped.
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
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"git apply --inaccurate-eof" when used with "--ignore-space-change"
triggered an internal sanity check, which has been fixed.
* rs/apply-inaccurate-eof-with-incomplete-line:
apply: update line lengths for --inaccurate-eof
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Some diff implementations don't report missing newlines at the end of
files. Applying such a patch can cause a newline character to be
added inadvertently. The option --inaccurate-eof of git apply can be
used to remove trailing newlines if needed.
apply_one_fragment() cuts it off from the buffers for preimage and
postimage. Before it does, it builds an array with the lengths of each
line for both. Make sure to update the length of the last line in
these line info structures as well to keep them consistent with their
respective buffer.
Without this fix the added test fails; git apply dies and reports:
fatal: BUG: caller miscounted postlen: asked 1, orig = 1, used = 2
That sanity check is only called if whitespace changes are ignored.
Reported-by: Mahmoud Al-Qudsi <mqudsi@neosmart.net>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Command line completion (in contrib/) has been taught about the
"--copy" option of "git branch".
* tz/complete-branch-copy:
completion: add '--copy' option to 'git branch'
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In 52d59cc645 (branch: add a --copy (-c) option to go with --move (-m),
2017-06-18), `git branch` learned a `--copy` option. Include it when
providing command completions.
Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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When "git rebase" prepared an mailbox of changes and fed it to "git
am" to replay them, it was confused when a stray "From " happened
to be in the log message of one of the replayed changes. This has
been corrected.
* ew/rebase-mboxrd:
rebase: use mboxrd format to avoid split errors
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The mboxrd format allows the use of embedded "From " lines in
commit messages without being misinterpreted by mailsplit
Reported-by: Florian Weimer <fweimer@redhat.com>
Signed-off-by: Eric Wong <e@80x24.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Code clean-up.
* sd/branch-copy:
config: avoid "write_in_full(fd, buf, len) != len" pattern
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As explained in commit 06f46f237 (avoid "write_in_full(fd, buf, len)
!= len" pattern, 2017–09–13) the return value of write_in_full() is
either -1 or the requested number of bytes. As such comparing the
return value to an unsigned value such as strbuf.len will fail to
catch errors. Change the code to use the preferred '< 0' check.
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Contrary to the documentation, "git pull -4/-6 other-args" did not
ask the underlying "git fetch" to go over IPv4/IPv6, which has been
corrected.
* sw/pull-ipv46-passthru:
pull: pass -4/-6 option to 'git fetch'
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The -4/-6 option should be passed through to 'git fetch' to be
consistent with the man page.
Signed-off-by: Wei Shuyu <wsy@dogben.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The SubmittingPatches document has been converted to produce an
HTML version via AsciiDoc/Asciidoctor.
* bc/submitting-patches-in-asciidoc:
Documentation: convert SubmittingPatches to AsciiDoc
Documentation: enable compat-mode for Asciidoctor
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The SubmittingPatches document is often cited by outside parties as an
example of good practices to follow, including logical, independent
commits; patch sign-offs; and sending patches to a mailing list.
Currently, people who want to cite a particular section tend to either
refer to it by name and let the interested party search through the
document to find it, or link to a given line number on GitHub and hope
the file doesn't change.
Instead, convert the document to AsciiDoc. Build it as part of the
technical documentation, since it is likely of interest to the same
group of people. Provide stable links to the sections which outside
parties are likely to want to link to. Make some minor structural
changes to organize it so that it can be formatted sanely.
Since the makefile needs a .txt extension in order to build with the
rest of the documentation, simply copy the file. Ignore the temporary
file so it doesn't get checked in accidentally, and remove it as part of
the clean process. Do this instead of renaming the file so that people
who have already linked to the documentation (who we're trying to help)
don't find their links broken. Avoid symlinking since Windows will not
like that.
This allows us to render the document as part of the website for the
benefit of others who wish to link to it as well as providing a more
nicely formatted display for our community and potential contributors.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Asciidoctor 1.5.0 and later have a compatibility mode that makes it more
compatible with some Asciidoc syntax, notably the single and double
quote handling. While this doesn't affect any of our current
documentation, it would be beneficial to enable this mode to reduce the
differences between AsciiDoc and Asciidoctor if we make use of those
features in the future.
Since this mode is specified as an attribute, if a version of
Asciidoctor doesn't understand it, it will simply be ignored.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Recent update to the refs infrastructure implementation started
rewriting packed-refs file more often than before; this has been
optimized again for most trivial cases.
* mh/avoid-rewriting-packed-refs:
files-backend: don't rewrite the `packed-refs` file unnecessarily
t1409: check that `packed-refs` is not rewritten unnecessarily
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Even when we are deleting references, we needn't overwrite the
`packed-refs` file if the references that we are deleting only exist
as loose references. Implement this optimization as follows:
* Add a function `is_packed_transaction_needed()`, which checks
whether a given packed-refs transaction actually needs to be carried
out (i.e., it returns false if the transaction obviously wouldn't
have any effect). This function must be called while holding the
`packed-refs` lock to avoid races.
* Change `files_transaction_prepare()` to check whether the
packed-refs transaction is actually needed. If not, squelch it, but
continue holding the `packed-refs` lock until the end of the
transaction to avoid races.
This fixes a mild regression caused by dc39e09942 (files_ref_store:
use a transaction to update packed refs, 2017-09-08). Before that
commit, unnecessary rewrites of `packed-refs` were suppressed by
`repack_without_refs()`. But the transaction-based writing introduced
by that commit didn't perform that optimization.
Note that the pre-dc39e09942 code still had to *read* the whole
`packed-refs` file to determine that the rewrite could be skipped, so
the performance for the cases that the write could be elided was
`O(N)` in the number of packed references both before and after
dc39e09942. But after that commit the constant factor increased.
This commit reimplements the optimization of eliding unnecessary
`packed-refs` rewrites. That, plus the fact that since
cfa2e29c34 (packed_ref_store: get rid of the `ref_cache` entirely,
2017-03-17) we don't necessarily have to read the whole `packed-refs`
file at all, means that deletes of one or a few loose references can
now be done with `O(n lg N)` effort, where `n` is the number of loose
references being deleted and `N` is the total number of packed
references.
This commit fixes two tests in t1409.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There is no need to rewrite the `packed-refs` file except for the case
that we are deleting a reference that has a packed version. Verify
that `packed-refs` is not rewritten when it shouldn't be.
In fact, two of these tests fail:
* A new (empty) `packed-refs` file is created when deleting any loose
reference and no `packed-refs` file previously existed.
* The `packed-refs` file is rewritten unnecessarily when deleting a
loose reference that has no packed counterpart.
Both problems will be fixed in the next commit.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There was a recent semantic mismerge in the codepath to write out a
section of a configuration section, which has been corrected.
* rs/config-write-section-fix:
config: flip return value of write_section()
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d9bd4cbb9cc (config: flip return value of store_write_*()) made
write_section() follow the convention of write(2) to return -1 on error
and the number of written bytes on success. 3b48045c6c7 (Merge branch
'sd/branch-copy') changed it back to returning 0 on error and 1 on
success, but left its callers still checking for negative values.
Let write_section() follow the convention of write(2) again to meet the
expectations of its callers.
Reported-by: Jeff King <peff@peff.net>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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We've been waiting long enough, a few more would not hurt ;-)
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Leak fixes.
* ma/reduce-heads-leakfix:
reduce_heads: fix memory leaks
builtin/merge-base: free commit lists
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We currently have seven callers of `reduce_heads(foo)`. Six of them do
not use the original list `foo` again, and actually, all six of those
end up leaking it.
Introduce and use `reduce_heads_replace(&foo)` as a leak-free version of
`foo = reduce_heads(foo)` to fix several of these. Fix the remaining
leaks using `free_commit_list()`.
While we're here, document `reduce_heads()` and mark it as `extern`.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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In several functions, we iterate through a commit list by assigning
`result = result->next`. As a consequence, we lose the original pointer
and eventually leak the list.
Rewrite the loops so that we keep the original pointers, then call
`free_commit_list()`. Various alternatives were considered:
1) Use `UNLEAK(result)` before the loop. Simple change, but not very
pretty. These would definitely be new lows among our usages of UNLEAK.
2) Use `pop_commit()` when looping. Slightly less simple change, but it
feels slightly preferable to first display the list, then free it.
3) As in this patch, but with `UNLEAK()` instead of freeing. We'd still
go through all the trouble of refactoring the loop, and because it's not
super-obvious that we're about to exit, let's just free the lists -- it
probably doesn't affect the runtime much.
In `handle_independent()` we can drop `result` while we're here and
reuse the `revs`-variable instead. That matches several other users of
`reduce_heads()`. The memory-leak that this hides will be addressed in
the next commit.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Leak fixes.
* ma/bisect-leakfix:
bisect: fix memory leak when returning best element
bisect: fix off-by-one error in `best_bisection_sorted()`
bisect: fix memory leak in `find_bisection()`
bisect: change calling-convention of `find_bisection()`
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When `find_bisection()` returns a single list entry, it leaks the other
entries. Move the to-be-returned item to the front and free the
remainder.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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After we have sorted the `cnt`-many commits that we have selected, we
place them into the commit list. We then set `p->next` to NULL, but as
we do so, `p` is already pointing one beyond item number `cnt`. Indeed,
we check whether `p` is NULL before dereferencing it.
This only matters if there are TREESAME-commits. Since they should be
skipped, they are not included in `cnt` and we will hit the situation
where we set `p->next` to NULL. As a result, the list will be one longer
than it should be. The last commit in the list will be one which occurs
earlier, or which shouldn't be included.
Do not update `p` the very last round in the loop. This ensures that
after the loop, `p->next` points to the remainder of the list, and we
can set it to NULL. While we're here, free that remainder to fix a
memory leak.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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`find_bisection()` rebuilds the commit list it is given by reversing it
and skipping uninteresting commits. The uninteresting list entries are
leaked. Free them to fix the leak.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This function takes a commit list and returns a commit list. The
returned list is built by modifying the original list. Thus the caller
should not use the original list again (and after the next commit fixes
a memory leak, it must not).
Change the function signature so that it takes a **list and has void
return type. That should make it harder to misuse this function.
While we're here, document this function.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A fix for an ancient bug in "git apply --ignore-space-change" codepath.
* rs/apply-fuzzy-match-fix:
apply: avoid out-of-bounds access in fuzzy_matchlines()
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fuzzy_matchlines() uses a pointers to the first and last characters of
two lines to keep track while matching them. This makes it impossible
to deal with empty strings. It accesses characters before the start of
empty lines. It can also access characters after the end when checking
for trailing whitespace in the main loop.
Avoid that by using pointers to the first character and the one *after*
the last one. This is well-defined as long as the latter is not
dereferenced. Basically rewrite the function based on that premise; it
becomes much simpler as a result. There is no need to check for
leading whitespace outside of the main loop anymore.
Reported-by: Mahmoud Al-Qudsi <mqudsi@neosmart.net>
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Doc update around use of "format-patch --subject-prefix" etc.
* ad/submitting-patches-title-decoration:
doc/SubmittingPatches: correct subject guidance
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