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git/t/t3202-show-branch-octopus.sh
Junio C Hamano 3af1cae469 show-branch: fix segfault when showbranch.default exists
When running "git show-branch" without any parameter in a repository that
has showbranch.default defined, we used to rely on the fact that our
handcrafted option parsing loop never looked at av[0].

The array of default strings had the first real command line argument in
default_arg[0], but the option parser wanted to look at the array starting
at av[1], so we assigned the address of -1th element to av to force the
loop start working from default_arg[0].

This no longer worked since 5734365 (show-branch: migrate to parse-options
API, 2009-05-21), as parse_options_start() saved the incoming &av[0] in
its ctx->out and later in parse_options_end() it did memmove to ctx->out
(with ctx->cpidx == 0), overwriting the memory before default_arg[] array.

I am not sure if this is a bug in parse_options(), or a bug in the caller,
and tonight I do not have enough concentration to figure out which.  In
any case, this patch works the issue around.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-10-04 14:44:34 -07:00

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#!/bin/sh
test_description='test show-branch with more than 8 heads'
. ./test-lib.sh
numbers="1 2 3 4 5 6 7 8 9 10"
test_expect_success 'setup' '
> file &&
git add file &&
test_tick &&
git commit -m initial &&
for i in $numbers
do
git checkout -b branch$i master &&
> file$i &&
git add file$i &&
test_tick &&
git commit -m branch$i || break
done
'
cat > expect << EOF
! [branch1] branch1
! [branch2] branch2
! [branch3] branch3
! [branch4] branch4
! [branch5] branch5
! [branch6] branch6
! [branch7] branch7
! [branch8] branch8
! [branch9] branch9
* [branch10] branch10
----------
* [branch10] branch10
+ [branch9] branch9
+ [branch8] branch8
+ [branch7] branch7
+ [branch6] branch6
+ [branch5] branch5
+ [branch4] branch4
+ [branch3] branch3
+ [branch2] branch2
+ [branch1] branch1
+++++++++* [branch10^] initial
EOF
test_expect_success 'show-branch with more than 8 branches' '
git show-branch $(for i in $numbers; do echo branch$i; done) > out &&
test_cmp expect out
'
test_expect_success 'show-branch with showbranch.default' '
for i in $numbers; do
git config --add showbranch.default branch$i
done &&
git show-branch >out &&
test_cmp expect out
'
test_done