Tue Jun 18 2019 00:47:04 UTC
I'm 100% sure this might fix it!
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ID Product Component Assignee Status Resolution Summary Changed
199799 Ports & Packages Individual Port(s) koobs In Progress --- multimedia/libx264: Core dump when compiled on i386 with clang (on 10.1) 2018-01-12
One bug found.

as

File a new bug in the "Individual Port(s)" component of the "Ports & Packages" product