Michael Heerdegen <michael_heerdegen@web.de> writes:

> Is it intended to add an :gv-expanders entry to
> byte-compile-macro-environment more than once?

Hmm, not entirely consciously, I was following the same pattern I had
used for cl-symbol-macrolet, but in that case we're establishing a
let-binding so it's important to be able to pop back to the old binding.
It's not needed here though.

Also, I had a typo in gv-get (:gv-expands instead of :gv-expanders),
because I didn't actually test the positive case.  Here's a working(?)
version, with tests: