larroy commented on issue #12160: Remove conflicting llvm OpenMP from cmake 
builds
URL: https://github.com/apache/incubator-mxnet/pull/12160#issuecomment-495012544
 
 
   I spent some time debugging this assertion, it was long ago, but if I 
remember correctly is related to the problematic use of pthread_atfork in 
https://github.com/apache/incubator-mxnet/blob/master/src/initialize.cc#L76
   Which causes openmp to be reinitialized and the assertion to be triggered.
   I'm not sure what you want to do with this information or what you suggest 
to do with that problem and that problematic piece of code which caused hard 
bugs in the past, but I would say it's out of the scope of this PR.
   

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