bug#40522: ‘guile3.0-guix’ sometimes fails to build on i686 (“Too many heap sections”)

[Ludovic Courtès]

‘guile3.0-guix’ occasionally fails to build on i686-linux:

--8<---------------cut here---------------start------------->8---
[ 94%] GUILEC   gnu/services/cuirass.go
[ 94%] GUILEC   gnu/services/cups.go
GC Warning: Failed to expand heap by 8388608 bytes
GC Warning: Failed to expand heap by 8388608 bytes

[...]

GC Warning: Failed to expand heap by 8388608 bytes
GC Warning: Failed to expand heap by 8388608 bytes
Too many heap sections: Increase MAXHINCR or MAX_HEAP_SECTS
/gnu/store/7ffcr3knh5jrj3lig4qf4fv0iws51l14-bash-minimal-5.0.7/bin/bash: line 
7: 28331 Aborted                 XDG_CACHE_HOME=/nowhere 
host=i686-unknown-linux-gnu srcdir="." ./pre-inst-env 
/gnu/store/znlp9v4z0pda450bbsfqzppqj2m61sz9-guile-next-3.0.2/bin/guile -L "." 
-L "." --no-auto-compile -s "."/build-aux/compile-all.scm […]
--8<---------------cut here---------------end--------------->8---

(From
<https://berlin.guixsd.org/log/czsdfjykhlc4ngjdva17i4rglpnh86fl-guile3.0-guix-1.0.1-15.0984481>.)

<https://berlin.guixsd.org/search?query=guile3.0-guix+system%3Ai686-linux>
suggests it happens only occasionally.  I suspect it’s more likely when
doing ‘-j 96’ than when doing ‘-j 4’ because the former requires more
memory.

Ludo’.