[Haskell-cafe] Way to prevent a value from being garbage collected too early

[Ben Gamari]

On May 13, 2020 5:00:08 AM EDT, Henning Thielemann <lemming at henning-thielemann.de> wrote:
>
>On Wed, 13 May 2020, Sylvain Henry wrote:
>
>> It's quite fragile (e.g. can be optimized away or moved), so we're
>trying to replace it with something else. See
>> https://gitlab.haskell.org/ghc/ghc/-/wikis/proposal/with-combinator
>
>I remember that the fragility due to optimization is quite a problem. I
>
>found that creating a StablePtr is reliable, however.
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Yes, but do note that the latter of significantly more expensive. 

Cheers,

— Ben