fre 2019-05-17 klockan 08:16 -0400 skrev Stefan Monnier:

> The patch looks fine, but could you add corresponding regression
> tests?

Added. I wasn't sure how you test these things, but I both added some
functional tests and some kind of check of the bytecode. If you find
the latter superfluous, I can drop it; I think the functional tests are
reliable enough. In other words, we have a case of miscompilation.

There was another bug in the original code which survived into the
first patch: the check for duplicate keys was done with `assq', which
of course doesn't work for stuff compared with `eql' or `equal'. Now
fixed.