https://bugs.documentfoundation.org/show_bug.cgi?id=152943

--- Comment #8 from Sakura286 <sakura...@outlook.com> ---
(In reply to Eike Rathke from comment #5)

> We might have to have a runtime check in Calc as well and bail out if NaN
> payloads are not supported.

Yes, a compile time check cannot guarantee that this functionality works well
at runtime. So what behaviour should Calc take when detects the lack of NaN
payload support at runtime?

As I understand it, there might be three solutions:

1. Giving a warning and shutting down calc.
2. Giving a warning and disclaimer. Calc continues running.
3. Silently switch to a non-NaN payload mode.

For #1, maybe it is a bit distructive to directly rule out RISC-V as a
supported platform. #2 is a transitional solution. For #3, is it possible to
add this feature?

According to my observation, on riscv64, Calc does return error code when a
formula error occurs, but sometimes it returns wrong error code '#NUM'.

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