Why SQL Server Migration Assistant keeps crashing on the 'Migrate Data' step?
One more thing that helped me in addition to setting affinity to Core 0 only:

SSMA stopped crashing after I set Parallel Data Migration Thread Count to 1. 
You can find it in Tools &gt; Project settings &gt; Genaral &gt; Migration (in the left pane) &gt; Parallel Data Migration. Set Parallel data migration mode to Custom and then Thread count to 1.

My current version is 7.0.0, MySQL ODBC Driver version is 5.3.6.