DirectorySlash causes a segfault (at least when used in .htaccess, other places not tested yet). This needs to be investigated further.
*lurk* Seeing it on 2.0.55 at least.
ok, finally got around to testing this. It's the AddDirectoryIndex patch that is causing this. And my rewritten patch for 2.2 seems to have the same problem (I was hoping that rewriting it in a bit cleaner and simpler way would solve the problem, but it hasn't) resolving as a duplicate *** This bug has been marked as a duplicate of 106808 ***