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https://issues.apache.org/jira/browse/GROOVY-2072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15458737#comment-15458737
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Youri Ackx commented on GROOVY-2072:
------------------------------------
6 years later :-) On OSX 10.11.6, the circular reference ends after a certain
amount of recursion.
{code:title=circular}
youri:symlinks $ ls -l
lrwxr-xr-x 1 youri staff 1 Sep 2 16:28 foo -> .
youri:symlinks $ ls
./foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo
ls:
./foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo/foo:
Too many levels of symbolic links
{code}
You can't even {{ls}} it. So calling this snippet:
{code:title=circular.groovy}
def f = new File('.')
f.eachFileRecurse { println it }
{code}
will not cause any crash or SO. Maybe a similar behavior exists on more recent
versions of the Linux kernel?
> eachFileRecurse crashes when descending a directory with circular symbolic
> links
> --------------------------------------------------------------------------------
>
> Key: GROOVY-2072
> URL: https://issues.apache.org/jira/browse/GROOVY-2072
> Project: Groovy
> Issue Type: Bug
> Components: groovy-jdk
> Affects Versions: 1.1-beta-2
> Environment: redhat fc5, sun java 5 or 6, ubuntu feisty, sun java 5
> or 6
> Reporter: Phil Walker
>
> The following script will quickly stack overflow on linux if the
> IllegalArgumentException line is commented out.
> #!/usr/bin/env groovy
> def ff = new File("/sys/block/md0/subsystem");
> def isSymlink(ff){
> return ff.getAbsolutePath()!=ff.getCanonicalPath() ;
> }
> ff.eachFileRecurse {
> printf("%s\n",it);
> if( isSymlink(it) ){
> throw new IllegalArgumentException("circular symlinks");
> }
> }
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