Re: [Maxima-discuss] float(%e^1000) first gives error, on second try gives "false"

Simpler testcase:

(%i1) 2.0^1024;
Maxima encountered a Lisp error:
arithmetic error FLOATING-POINT-OVERFLOW signalled
Automatically continuing.
To enable the Lisp debugger set *debugger-hook* to nil.

(%i2) 2.0^1024;
(%o2) false

Yet another type of answer:

(%i3) %e^1000.0;
(%o3) #.SB-EXT:DOUBLE-FLOAT-POSITIV*10^XT:DOUBLE-FLOAT-POSITIVE-INFINITY

Am Fr., 23. Dez. 2022 um 23:06 Uhr schrieb David Scherfgen <
d.s...@go...>:

> Hello all,
>
> this is a very strange one:
>
> First try:
>
> (%i1)   float(%e^1000);
> Maxima encountered a Lisp error:
>  arithmetic error FLOATING-POINT-OVERFLOW signalled
> Automatically continuing.
> To enable the Lisp debugger set *debugger-hook* to nil.
>
> That's OK, I guess. But when we try the same again, we suddenly get
> "false":
>
> (%i2)   float(%e^1000);
> (%o2)   false
>
> I guess the first try changes some internal setting and fails to reset it,
> so that the second try gives another (bogus) result?
>
> Best regards
> David Scherfgen
>