Re: [BUG] git-check-ignore: Segmentation fault

> Hi there,
>
> The new git-check-ignore command seg faults when
>     (1) it is called with single dot path name at $GIT_DIR level  _AND_
>     (2) and .gitignore has at least one directory pattern.
>
> Git version: 1.8.2.rc0.16.g20a599e
>
> Reproduce the bug:
>     $ git --version
>     git version 1.8.2.rc0.16.g20a599e
>     $ mkdir test
>     $ cd test
>     $ git init
>     $ git check-ignore .  # All good, no errors here
>     $ echo "dirpattern/" > .gitignore
>     $ git check-ignore .
>     Segmentation fault (core dumped)
>
> The segmentation fault is actually caused by hash_name(const char
> *name, int namelen) function in name-hash.c when the 'name' argument
> is an empty stringi and namelen is 0.
>
> The empty string comes from a call to the prefix_path(prefix, len,
> path) function in setup.c. In this instance arguments 'prefix' is
> NULL, 'len' is 0 and 'path' is "." .