Ludovic Courtès <ludo@gnu.org> skribis:

> In a nutshell, Guile installs its own GMP memory allocation routines
> (when ‘scm_install_gmp_memory_functions’ is true, which is the default)
> so that GMP allocates via libgc.  GnuTLS uses Nettle, which uses GMP, so
> Nettle too ends up allocating via libgc; however, since pointers to that
> memory are not scanned by libgc, they end up being reclaimed early.

For the record, one option I considered is to link GnuTLS against
Nettle-with-mini-GMP, whereby Nettle uses a bundled mini-GMP instead of
mini-GMP.

Another option is to build GnuTLS --with-nettle-mini, where GnuTLS links
against a bundled mini-Nettle, instead linked against a bundled mini-GMP (!).

Currently both options lead to build failures in GnuTLS:

  https://lists.gnutls.org/pipermail/gnutls-help/2021-February/004680.html

(Package definitions attached for posterity.)

Ludo’.