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Prune parameter-free subtrees; reach param_source through the children hook #562

	name: ASan+UBSan

	on:
	push:
	branches: [main, development]
	pull_request:
	branches: [main, development]

	jobs:
	build:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, macos-latest]

	steps:
	- uses: actions/checkout@v5

	- name: Install BLAS (Ubuntu)
	if: runner.os == 'Linux'
	run: sudo apt-get update && sudo apt-get install -y libopenblas-dev

	# Note: a plain-scalar `run: cmake ... \` with backslash continuations
	# folds into one line with the backslashes kept, silently dropping the
	# -D flags (the job then built a plain default-config binary with no
	# sanitizers). The > folded style below makes the flags actually apply.
	- name: Configure with sanitizers
	run: >
	cmake -B build -S .
	-DCMAKE_BUILD_TYPE=Debug
	-DCMAKE_C_FLAGS="-fsanitize=address,undefined -fno-omit-frame-pointer -g"
	-DCMAKE_CXX_FLAGS="-fsanitize=address,undefined -fno-omit-frame-pointer -g"

	- name: Build
	run: cmake --build build --config Debug

	- name: Run tests under ASan+UBSan
	run: ./build/all_tests