* Re: 02/04: monads, gexp: Prevent redefinition of syntax parameters.
[not found] ` <20190206220625.8BB03209A7@vcs0.savannah.gnu.org>
@ 2019-02-07 7:50 ` Ricardo Wurmus
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From: Ricardo Wurmus @ 2019-02-07 7:50 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: guix-devel
guix-commits@gnu.org writes:
> civodul pushed a commit to branch master
> in repository guix.
>
> commit 8245bb74fc7bdcdc2f9d458057cefc9cd982e489
> Author: Ludovic Courtès <ludo@gnu.org>
> Date: Wed Feb 6 21:58:43 2019 +0100
>
> monads, gexp: Prevent redefinition of syntax parameters.
>
> Fixes <https://bugs.gnu.org/27476>.
>
> This fixes multi-threaded compilation of this code where syntax
> parameters could end up being redefined and where a race condition could
> lead a thread to see the "wrong" value of the syntax parameter.
>
> * guix/monads.scm (define-syntax-parameter-once): New macro.
> (>>=, return): Use it.
> * guix/gexp.scm (define-syntax-parameter-once): New macro.
> (current-imported-modules, current-imported-extensions): Use it.
Oh yeah!
Thank you so much for squashing this bug (and all of those it was merged
with)!
--
Ricardo
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[not found] ` <20190206220625.8BB03209A7@vcs0.savannah.gnu.org>
2019-02-07 7:50 ` 02/04: monads, gexp: Prevent redefinition of syntax parameters Ricardo Wurmus
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