[PATCH 4/5] Fix deadlock in _int_free consistency check

[Florian Weimer]

On 10/12/2017 11:35 AM, Wilco Dijkstra wrote:
> This patch fixes a deadlock in the fastbin consistency check.
> If we fail the fast check due to concurrent modifications to
> the next chunk or system_mem, we should not lock if we already
> have the arena lock.  Simplify the check to make it obviously
> correct.

I don't think the subject line is correct.  What is the deadlock?  I 
don't see it.

Thanks,
Florian