Bump actions/checkout from 3 to 4 #8

	permissions:
	contents: read
	on:
	push:
	branches: [main]
	pull_request:
	# Spend CI time only on latest ref: https://github.com/jonhoo/rust-ci-conf/pull/5
	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true
	name: safety
	jobs:
	sanitizers:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: true
	- name: Install nightly
	uses: dtolnay/rust-toolchain@nightly
	- run: \|
	# to get the symbolizer for debug symbol resolution
	sudo apt install llvm
	# to fix buggy leak analyzer:
	# https://github.com/japaric/rust-san#unrealiable-leaksanitizer
	# ensure there's a profile.dev section
	if ! grep -qE '^[ \t]*[profile.dev]' Cargo.toml; then
	echo >> Cargo.toml
	echo '[profile.dev]' >> Cargo.toml
	fi
	# remove pre-existing opt-levels in profile.dev
	sed -i '/^\s\[profile.dev\]/,/^\s\[/ {/^\s*opt-level/d}' Cargo.toml
	# now set opt-level to 1
	sed -i '/^\s*\[profile.dev\]/a opt-level = 1' Cargo.toml
	cat Cargo.toml
	name: Enable debug symbols
	- name: cargo test -Zsanitizer=address
	# only --lib --tests b/c of https://github.com/rust-lang/rust/issues/53945
	run: cargo test --lib --tests --all-features --target x86_64-unknown-linux-gnu
	env:
	ASAN_OPTIONS: "detect_odr_violation=0:detect_leaks=0"
	RUSTFLAGS: "-Z sanitizer=address"
	- name: cargo test -Zsanitizer=leak
	if: always()
	run: cargo test --all-features --target x86_64-unknown-linux-gnu
	env:
	LSAN_OPTIONS: "suppressions=lsan-suppressions.txt"
	RUSTFLAGS: "-Z sanitizer=leak"

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