symlinks interact badly with Dir; cause infinite loop/recursion #364
Description
There seems to be a symlink corner case that causes Dir expansion to infinitely loop/recur. In the test case, two multiply nested directories contain symbolic links back to their shared parent.
My test case is a directory named objc. The ls -LR contents are
~/objc ls -lR
total 0
drwxr-xr-x 3 smparkes smparkes 102 Oct 29 13:12 examples
./examples:
total 0
drwxr-xr-x 4 smparkes smparkes 136 Oct 29 13:13 osx
./examples/osx:
total 0
drwxr-xr-x 3 smparkes smparkes 102 Oct 29 13:14 bare
drwxr-xr-x 3 smparkes smparkes 102 Oct 29 13:13 demo
./examples/osx/bare:
total 8
lrwxr-xr-x 1 smparkes smparkes 16 Sep 27 16:32 objc -> ../../../../objc
./examples/osx/demo:
total 8
lrwxr-xr-x 1 smparkes smparkes 16 Sep 27 16:32 objc -> ../../../../objc
Should be able to create it with (bash)
mkdir -p objc/osx/{bare,demo}
ln -s ../../../../objc objc/osx/bare
ln -s ../../../../objc objc/osx/demo
Then running ruby -e 'p Dir["**/*.o"]' never returns.
Tested on 1.6.8 and 1.7.0.