On Wed, Sep 13, 2017 at 03:38:52PM +0200, demerphq wrote: > I just double checked the terminal history and this is all i saw: > > $ git status > On branch yves/xxx > Your branch is based on 'origin/yves/xxx', but the upstream is gone. > (use "git branch --unset-upstream" to fixup) > > nothing to commit, working tree clean > $ git branch --unset-upstream > fatal: could not unset 'branch.yves/xxx.merge' > $ git status > On branch yves/xxx > nothing to commit, working tree clean > $ git fetch > fatal: No remote repository specified. Please, specify either a URL or a > remote name from which new revisions should be fetched. As a side note, I'm surprised that commands work at all when your .git/config is empty. I'd expect check_respository_format() to complain that you are not in a repository. Looks like it is due to this block: 452 /* 453 * For historical use of check_repository_format() in git-init, 454 * we treat a missing config as a silent "ok", even when nongit_ok 455 * is unset. 456 */ 457 if (candidate.version < 0) 458 return 0; > > No, it writes the new content to "config.lock" and then renames it into > > place. > > All of the write() calls to the temporary file are checked. > > I was going to say that perhaps the write was not checked... But if > you are confident they are then... You're welcome to read over the function to double-check, but I just looked it over and couldn't find any unchecked writes. > > Given that your output is consistent with it failing to find the key, > > and that the result is an empty file, it sounds like somehow the mmap'd > > input appeared empty (but neither open nor fstat nor mmap returned an > > error). You're not on any kind of exotic filesystem, are you? > > I don't think so, but I don't know. Is there a command I can run to check? > > BTW, with a bit of faffing I can probably recreate this problem. > Should I try? Is there something I could do during recreation that > would help? If you think you can reproduce, the output of "strace" on a failing invocation would be very interesting. -Peff
