Fix out of bound read in UTF-32 decoder on "narrow Unicode" builds.
Issue #11461: Fix the incremental UTF-16 decoder. Original patch by
Amaury Forgeot d'Arc. Added tests for partial decoding of non-BMP
characters.
Null merge
Issue #11461: Fix the incremental UTF-16 decoder. Original patch by
Amaury Forgeot d'Arc. Added tests for partial decoding of non-BMP
characters.
Issue #16843: Make concurrent tests for sched module deterministic.