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• Improved the usability of examples and tutorials
• C++ Stack traces are now demangled in OSX and Linux (improved developer experience and bug reports).

Bug-fixes

• Fixed I/O multiprocessing for too many open file handles (#8904), race condition (#8995), deadlock (#9126).

• Fixed image IO integration with OpenCV 3.3 (#8757).

• Fixed Gluon block printing (#8956).

• Fixed float16 argmax when there is negative input. (#9149)

• Fixed random number generator to ensure sufficient randomness. (#9119, #9256, #9300)

• Fixed custom op multi-GPU scaling (#9283)

• Fixed gradient of gather_nd when duplicate entries exist in index. (#9200)

• Fixed overriden contexts in Module `group2ctx` option when using multiple contexts (#8867)
• Fixed `swap_axes` operator with "add_to" gradient req  (#9541)
• Fixed SSD kernel launch resource limits on volta (#9480)

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