bug#46447: segfault with bugnum

On Thu, Feb 11, 2021 at 09:54:38PM +0100, Ricardo Wurmus wrote:
> This program sometimes causes Guile 3.0.5 to segfault:
> 
>   (define a (expt 2 (expt 3 (expt 4 2))))
>   (display (remainder a 1000000000))
>   (display "\n")
> 
> And sometimes this program doesn’t terminate.  Here’s an example
> session with the program saved to foo.scm:

The first expr alone seems to segfault for me (Guile 3.0.4.38-64c894-dirty)
repeatably (well, that means 5 times in a row ;)

Cheers
 - t

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