Fix crash when attempting to dow-cast `nullptr` in debug builds #390

	name: CI

	on:
	push:
	branches: [prism]
	pull_request:
	branches: [prism]
	env:
	RUBY_ROOT: '/opt/hostedtoolcache/Ruby/3.3.0/x64'

	jobs:
	tests:
	runs-on: ubuntu-latest
	name: Prism Parser Regression Tests
	steps:
	- uses: actions/checkout@v4
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.3.0
	- name: Set up Bazel
	uses: bazel-contrib/[email protected]
	with:
	# Avoid downloading Bazel every time.
	bazelisk-cache: true
	# Store build cache per workflow.
	disk-cache: ${{ github.workflow }}
	# Share repository cache between workflows.
	repository-cache: true
	- name: Verify parse trees
	run: ./tools/scripts/verify_prism_regression_tests.sh
	- name: Run tests
	run: ./bazel test //test:prism --config=dbg --test_output=errors
	- name: Run location tests
	run: ./bazel test //test:prism_location_tests --config=dbg --test_output=errors

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