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Revision a4641c8b75b93ce30b706fceed7d2af976f8e578 authored by Jameson Nash on 06 May 2020, 19:12:05 UTC, committed by GitHub on 06 May 2020, 19:12:05 UTC 
threading: improve safety posture of modifying global bindings (#35761)
 
Ensures that we are holding some lock (a new one) while mutating the
internal global `jl_current_modules` table.

While reading these binding values is not memory-safe to do
simultaneously (it may invent pointers from thin-air and segfault), this
commit ensures that a data conflict during the writes to them will
not corrupt the values written into memory.
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