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Re: [Git 2.13.0] BUG: setup_git_env called without repository




Hi Johannes,

Here's the full text of the gdb session, including backtrace. Hope it helps!

$ pwd
/Users/jhagins/dev/github
$ gdb -args ./git/git config --local --get user.name
GNU gdb (GDB) 7.12.1
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin16.4.0".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from ./git/git...done.
(gdb) b die_builtin
Breakpoint 1 at 0x100210757: file usage.c, line 33.
(gdb) r
Starting program: /Volumes/git/github/git/git config --local --get user.name
[New Thread 0x1403 of process 64101]
warning: unhandled dyld version (15)

Thread 2 hit Breakpoint 1, die_builtin (err=0x100270d95 "BUG:
setup_git_env called without repository", params=0x7fff5fbfdbe0) at
usage.c:33
33 vreportf("fatal: ", err, params);
(gdb) bt
#0  die_builtin (err=0x100270d95 "BUG: setup_git_env called without
repository", params=0x7fff5fbfdbe0) at usage.c:33
#1  0x000000010020fc80 in die (err=0x100270d95 "BUG: setup_git_env
called without repository") at usage.c:120
#2  0x000000010012cb2b in setup_git_env () at environment.c:172
#3  0x000000010012cab7 in get_git_dir () at environment.c:214
#4  0x0000000100214e9c in get_worktree_git_dir (wt=0x0) at worktree.c:215
#5  0x000000010017968c in do_git_path (wt=0x0, buf=0x7fff5fbfde50,
fmt=0x10024c24d "config", args=0x7fff5fbfde70) at path.c:395
#6  0x0000000100179c78 in git_pathdup (fmt=0x10024c24d "config") at path.c:437
#7  0x0000000100030449 in cmd_config (argc=1, argv=0x7fff5fbfe180,
prefix=0x0) at builtin/config.c:527
#8  0x0000000100001ac5 in run_builtin (p=0x10028c3a8, argc=4,
argv=0x7fff5fbfe180) at git.c:371
#9  0x0000000100000cc6 in handle_builtin (argc=4, argv=0x7fff5fbfe180)
at git.c:572
#10 0x0000000100001883 in run_argv (argcp=0x7fff5fbfe12c,
argv=0x7fff5fbfe120) at git.c:624
#11 0x0000000100000a4f in cmd_main (argc=4, argv=0x7fff5fbfe180) at git.c:701
#12 0x00000001000c3772 in main (argc=5, argv=0x7fff5fbfe178) at common-main.c:43

Cheers,
Josh

On Fri, May 12, 2017 at 10:48 AM, Johannes Schindelin
<Johannes.Schindelin@xxxxxx> wrote:
> Hi Josh,
>
> On Fri, 12 May 2017, Josh Hagins wrote:
>
>> Since upgrading to Git 2.13.0 I'm seeing this error message whenever
>> `git config --local <whatever>` is called outside a Git repository.
>> For example, note the difference in behavior between Git 2.13 and
>> Apple Git:
>>
>>     $ pwd
>>     /Users/jhagins
>>     $ /usr/bin/git --version
>>     git version 2.11.0 (Apple Git-81)
>>     $ /usr/bin/git config --local --get user.name
>>     $ /usr/local/bin/git --version
>>     git version 2.13.0
>>     $ /usr/local/bin/git config --local --get user.name
>>     fatal: BUG: setup_git_env called without repository
>>
>> Apple Git outputs nothing, as expected. The summarized release notes
>> published by GitHub specifically mentioned that instances of this
>> error message should be reported, so here you go!
>>
>> Please let me know if I can provide any more information that would be
>> helpful.
>
> Since this is in /usr/local/bin/, there are two possibilities:
>
> 1) you built and installed it yourself (but then it would be more likely
>    in your $HOME/bin), or
>
> 2) you installed it via HomeBrew.
>
> I guess it is the latter.
>
> In both cases, however, you have XCode installed, so you can dig further.
> Yay.
>
> The thing I would do in your case would be to clone Git:
>
>         git clone https://github.com/git/git
>
> then check out v2.13.0:
>
>         git checkout v2.13.0
>
> then edit the Makefile to remove the -O2 from the CFLAGS (the next step is
> to use the GNU debugger, and in my hands the -O2 optimization made that
> pretty useless), and then build with
>
>         make
>
> After that, you should be able to start the command in your local GNU
> debugger:
>
>         gdb -args ./git config --local --get user.name
>
> You will then want to set a breakpoint on the die_builtin() function:
>
>         b die_builtin
>
> Now run it with the `r` command, and it should stop in the die_builtin
> routine, in which case a backtrace would be most helpful to figure out
> what is going wrong:
>
>         bt
>
> If the output is not enlightening on its own, it would be nice to paste it
> into a reply to this mail so that the entire Git developer community can
> have a look.
>
> Ciao,
> Johannes



-- 
Josh Hagins