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Subject: Make bcmath functions more strict
From: vladyslavstartsev@gmail.com (Vladyslav Startsev)

Hello everyone!

Recently I noticed that there are strange behavior going on if I use
bcmath functions (some examples you can see here
https://3v4l.org/D3s7J). I also previously had little discussion with
Sara Golemon on twitter about this
(https://twitter.com/SaraMG/status/1087902930110480384). So to
conclude things that I want, is drop behavior (they should throw
invalid argument exception) that I've showed in the first link and as
Sara suggested add deprecation warning (but I think it should be
E_NOTICE level errors) in 7.4.

------
Vladyslav Startsev