AbstractVirtualFileHandler.checkClosed()

[alesj]

protected void checkClosed() throws IllegalStateException
 {
 if (references.get() < 0)
 throw new IllegalStateException("Closed " + this);
 }

Shouldn't there be a <= 0 condition?

[starksm64]

No because 0 is the state of an open handler with no references. If it was <= 0, then first call to getVirtualFile() would fail with an IllegalStateException.