- update to v2021.7.0:
* Memory allocator crash on a system with an incomplete /proc/meminfo
(GitHub* #584).
* Incorrect blocking of task stealing (GitHub* #478).
* Hang due to incorrect decrement of a limiter_node (GitHub* #634).
* Memory corruption in some rare cases when passing big messages in a flow
graph (GitHub* #639).
* Possible deadlock in a throwable flow graph node with a lightweight
policy. The lightweight policy is now ignored for functors that can
throw exceptions (GitHub* #420).
* Crash when obtaining a range from empty ordered and unordered containers
(GitHub* #641).
* Deadlock in a concurrent_vector resize() that could happen when the new
size is less than the previous size (GitHub* #733).