Bug#1039474: ghc: GHCi sometimes segfaults

[Scott Talbert]

On Mon, 26 Jun 2023, Gard Spreemann wrote:

> GHCi seems to segfault randomly every now and then, after seemingly
> failing to allocate memory for simple operations, e.g.:
>
> $ ghci
> GHCi, version 9.0.2: https://www.haskell.org/ghc/  :? for help
> ghci> 750+850
> 1600
> ghc: mmap 4096 bytes at (nil): Cannot allocate memory
> ghc: Try specifying an address with +RTS -xm<addr> -RTS
> zsh: segmentation fault  ghci

I've run into the same issue as well, mostly while trying to compile using 
clash.

It seems that a kernel regression may be partly to blame as well, as 
observed in this Arch forum thread [1].  It may or may not be fixed by a 
kernel fix as well (I haven't tested it myself).

Regards,
Scott

[1] https://bbs.archlinux.org/viewtopic.php?id=282429