The SubgraphThread created by MasterTmgThread is never joined.
Haven't observed any problems (hence not flagging this as a bug), but will need to try to create some. Break stuff. See what happens.
Try with 1 single thread. Lab2... Lab1?
Make a quick program to test thread-joining.
This issue was a brainfart. The SubgraphThreadfunction is called, but no Subgraph Thread is created. MasterTmgThread is joined, along with the args.numthreads-1SubgraphThreads. All is well.
The SubgraphThread created by MasterTmgThread is never joined. Haven't observed any problems (hence not flagging this as a bug), but will need to try to create some. Break stuff. See what happens.
Try with 1 single thread. Lab2... Lab1? Make a quick program to test thread-joining.