floor, ceiling, truncate and so on… on NaN fail

Those functions returns a total random value when given NaN. This is not an acceptable behavior I guess, and we might inquire on what to do.

For instance:

let nan = 0 / 0 in floor nan

result:

-269653970229347386159395778618353710042696546841345985910145121736599013708251444699062715983611304031680170819807090036488184653221624933739271145959211186566651840137298227914453329401869141179179624428127508653257226023513694322210869665811240855745025766026879447359920868907719574457253034494436336205824

Maybe an arithmetic exception would be a better behavior?

Trac metadata

Trac field	Value
Version	7.4.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	high
Resolution	Unresolved
Component	libraries/base
Test case
Differential revisions
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Architecture