internal/core/adt: add tests for 3729
Issue #3729
Signed-off-by: Marcel van Lohuizen <mpvl@gmail.com>
Change-Id: I99b5dc9a59eaf87ccd8a232bc62b5824fae2da91
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1211616
TryBot-Result: CUEcueckoo <cueckoo@cuelang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Unity-Result: CUE porcuepine <cue.porcuepine@gmail.com>