Attached patch reworking the feature which fixes the tests.
Explanation in patch.
On Sat, Sep 29, 2018 at 9:06 PM Allen Li <darkfeline@felesatra.moe> wrote:
>
> Oops, I'll take a look
> On Sat, Sep 29, 2018 at 5:52 PM Glenn Morris <rgm@gnu.org> wrote:
> >
> >
> > > branch: master
> > > commit 3bbe9e609138ae88a4c98bcee0da8fcf8b4a3e80
> > > Author: Allen Li <darkfeline@felesatra.moe>
> > > Commit: Eli Zaretskii <eliz@gnu.org>
> > >
> > >     Avoid writing empty abbrev tables
> >
> > Hi, this causes some abbrev tests to fail.
> > Ref eg https://hydra.nixos.org/build/82163465
> >
> > In general, after changing lisp/foo.el, running the tests from
> > test/lisp/foo.el only takes a few seconds.