Rust - Miri Testing (CRON) #286

	name: Rust - Miri Testing (CRON)
	on:
	schedule:
	# Conduct Miri testing on 3:30 UTC every night.
	- cron: "30 3 * * *"
	jobs:
	miri:
	name: Miri
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
	- uses: dtolnay/rust-toolchain@nightly
	with:
	components: miri
	targets: x86_64-unknown-linux-gnu
	- name: Set up Rust cache
	uses: Swatinem/rust-cache@v2
	- name: Checkout Submodules
	run: git submodule update --init --recursive
	- name: Install cargo-nextest
	run:
	# Note: We use `\|\| true` because cargo install returns an error
	# if cargo-nextest was already installed on the CI runner.
	cargo install cargo-nextest \|\| true
	- name: Miri Testing - Wasm Spec Testsuite
	env:
	# Debug assertions are checked in the normal test jobs.
	# They have huge overhead for Wasmi and unnecessarily slow down Miri.
	# The Miri job should focus on finding undefined behavior instead or logic errors.
	CARGO_PROFILE_DEV_DEBUG_ASSERTIONS: "false"
	run: cargo miri nextest run --target x86_64-unknown-linux-gnu --test spec_shim

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