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Ævar Arnfjörð Bjarmason 055e57b7b2 log: fix a memory leak in "git show <revision>..."
Fix a memory leak in code added in 5d7eeee2ac (git-show: grok blobs,
trees and tags, too, 2006-12-14). As we iterate over a "<revision>..."
command-line and encounter ad OBJ_COMMIT we want to use our "struct
rev_info", but with a "pending" array of one element: the one commit
we're showing in the loop.

To do this 5d7eeee2ac saved away a pointer to rev.pending.objects and
rev.pending.nr for its iteration. We'd then clobber those (and alloc)
when we needed to show an OBJ_COMMIT.

We'd therefore leak the "rev.pending" we started out with, and only
free the new "rev.pending" in the "OBJ_COMMIT" case arm as
prepare_revision_walk() would draw it down.

Let's fix this memory leak. Now when we encounter an OBJ_COMMIT we
save away the "rev.pending" before clearing it. We then add a single
commit to it, which our indirect invocation of prepare_revision_walk()
will remove. After that we restore the "rev.pending".

Our "rev.pending" will then get free'd by the release_revisions()
added in f6bfea0ad0 (revisions API users: use release_revisions() in
builtin/log.c, 2022-04-13)

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2022-08-03 10:16:28 -07:00

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#!/bin/sh
#
# Copyright (c) 2011 Frédéric Heitzmann
test_description='git svn dcommit --interactive series'
. ./lib-git-svn.sh
test_expect_success 'initialize repo' '
svn_cmd mkdir -m"mkdir test-interactive" "$svnrepo/test-interactive" &&
git svn clone "$svnrepo/test-interactive" test-interactive &&
cd test-interactive &&
touch foo && git add foo && git commit -m"foo: first commit" &&
git svn dcommit
'
test_expect_success 'answers: y [\n] yes' '
(
echo "change #1" >> foo && git commit -a -m"change #1" &&
echo "change #2" >> foo && git commit -a -m"change #2" &&
echo "change #3" >> foo && git commit -a -m"change #3" &&
( echo "y
y" | GIT_SVN_NOTTY=1 git svn dcommit --interactive ) &&
test $(git rev-parse HEAD) = $(git rev-parse remotes/git-svn)
)
'
test_expect_success 'answers: yes yes no' '
(
echo "change #1" >> foo && git commit -a -m"change #1" &&
echo "change #2" >> foo && git commit -a -m"change #2" &&
echo "change #3" >> foo && git commit -a -m"change #3" &&
( echo "yes
yes
no" | GIT_SVN_NOTTY=1 git svn dcommit --interactive ) &&
test $(git rev-parse HEAD^^^) = $(git rev-parse remotes/git-svn) &&
git reset --hard remotes/git-svn
)
'
test_expect_success 'answers: yes quit' '
(
echo "change #1" >> foo && git commit -a -m"change #1" &&
echo "change #2" >> foo && git commit -a -m"change #2" &&
echo "change #3" >> foo && git commit -a -m"change #3" &&
( echo "yes
quit" | GIT_SVN_NOTTY=1 git svn dcommit --interactive ) &&
test $(git rev-parse HEAD^^^) = $(git rev-parse remotes/git-svn) &&
git reset --hard remotes/git-svn
)
'
test_expect_success 'answers: all' '
(
echo "change #1" >> foo && git commit -a -m"change #1" &&
echo "change #2" >> foo && git commit -a -m"change #2" &&
echo "change #3" >> foo && git commit -a -m"change #3" &&
( echo "all" | GIT_SVN_NOTTY=1 git svn dcommit --interactive ) &&
test $(git rev-parse HEAD) = $(git rev-parse remotes/git-svn) &&
git reset --hard remotes/git-svn
)
'
test_done