chore: check for empty map in builtin notfound error #955

Job	Run time
ash-ci / mix igniter.upgrade	3s
ash-ci / audit	38s
ash-ci / mix deps.get	13s
ash-ci / MIX_ENV=test mix.compile	31s
ash-ci / mix docs	1m 56s
ash-ci / mix sobelow	35s
ash-ci / mix format --check-formatted	31s
ash-ci / mix credo --strict	35s
ash-ci / mix spark.cheat_sheets --check	37s
ash-ci / mix spark.formatter --check	36s
ash-ci / MIX_ENV=dev mix.compile	37s
ash-ci / mix ash.codegen --check	0s
ash-ci / mix dialyzer	3m 52s
ash-ci / mix test	1m 16s
ash-ci / mix deps.unlock --check-unused	26s
ash-ci / Deploy docs to GitHub pages.	8s
ash-ci / NIF ${{ matrix.nif }} - ${{ matrix.job.target }} (${{ matrix.job.os }})	0s
ash-ci / Release	0s
	12m 34s

Provide feedback