Here's one for Davi, Takashi or whomever wants to jump on it.
"apr_bucket_alloc crash when apr_allocator_alloc fails" https://issues.apache.org/bugzilla/show_bug.cgi?id=42066 The suggestion for apr_bucket_alloc to fail more cleanly, and for apr_allocator_alloc to win a new abort_fn hook, sound like wise ideas. But it takes a patch right now to do this, lest we wait for APR 1.4.0.