Emits a perl warning about uninitialized value when run from a removed directory

[xtaran]

Originally reported in Debian against ack 2.15_01, but I can also reproduce this with ack 2.14 as well as ack 2.15_03:

This program emits a perl warning when it is run from a directory that has been removed. To demonstrate:

$ mkdir /tmp/aaa
$ cd /tmp/aaa
$ rmdir /tmp/aaa
$ ack foo
Use of uninitialized value $cwd in pattern match (m//) at /usr/share/perl5/App/Ack/ConfigFinder.pm line 122.

[petdance]

Interesting. Thanks for reporting.

[petdance]

Apparently this can return undef.

my $cwd = Cwd::getcwd();

[petdance]

Fixed. Will be released in 2.17_02.