fix(mutation): honor filters and isolation#14848
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…compound assignment mutation, reject incompatible flags - runner: thread FilterArgs and --isolate through MutationRunConfig into compile_and_test_inner; rebuild ProjectPathsAwareFilter against the per-mutant temp config so --match-test/--match-contract/--match-path work and mutants exercise the same test set/execution model as baseline - mod: add runtime_context_digest folded into the per-file cache key so cached results aren't reused when filters, isolation, fork URL/block, sender, or initial_balance change - orchestrator: compute runtime_context_digest once per run and bind it to every MutationHandler - binary_op_mutator: stop mutating compound assignments (a += b would silently be rewritten to a - b dropping the assignment); add regression tests - cmd/test: bail when --mutate is combined with --list/--debug/ --flamegraph/--flamechart/--junit instead of silently mixing modes - fs_permissions guard now narrowed to permissions whose path can reach symlinked dependency trees (lib/node_modules/dependencies) Amp-Thread-ID: https://ampcode.com/threads/T-019e4567-e7ca-717e-bcc0-bb67a3667c4d Co-authored-by: Amp <amp@ampcode.com>
Blockers
- filter parity: pass materialized baseline filter (filter.args().clone())
into MutationRunConfig so positional 'forge test <path>' and --rerun
reach mutant runs too; raw self.filter dropped them silently
- bail when baseline matched zero tests; without it every compileable
mutant was reported as 'Alive'
- negative literal mutation: add OwnedLiteral::NegatedNumber(U256)
formatted as '-{val}'; the old Number(-*val) wrapped via two's
complement and produced wrong-source mutants
- mutator test harness: wrap snippets in valid Solidity, panic on parse
failure, and check emitted replacement text. Fixed 6 stale test
expectations and 1 unmatched delegate-pattern case the old vacuous
harness was hiding
Mediums
- survived-span resume: load retrieve_survived_spans BEFORE mutant
generation/cached load and filter cached mutants through
should_skip_span so cross-run adaptive skipping actually works
- runtime context digest: hash the full serialized EvmOpts (networks,
env, gas-limit toggles, fork, sender, balance, ...) instead of a
hand-picked 4-field subset that missed several mutation-affecting
knobs
- deterministic output: BTreeMap for JSON survived_mutants with sorted
entries; reporter sorts survived list by (path, line, col, span,
mutation); persisted results_vec sorted by span
- --mutate-contract: intersect with explicit --mutate <paths> instead of
silently overriding them; explicit paths are now respected
- workspace: copy 'script/' when present and distinct from src/test so
projects that import script-side helpers don't see false Invalid
mutants
Amp-Thread-ID: https://ampcode.com/threads/T-019e4567-e7ca-717e-bcc0-bb67a3667c4d
Co-authored-by: Amp <amp@ampcode.com>
mablr
changed the base branch from
mutation-testing-fast
to
mablr/mutation-cache-correctness
mablr
changed the title
mablr
requested review from
0xrusowsky,
DaniPopes,
figtracer,
grandizzy,
mablr,
mattsse and
stevencartavia
as code owners
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Base automatically changed from
mablr/mutation-cache-correctness
to
mutation-testing-fast
May 29, 2026 18:27
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Stacked on #14971 towards OSS-1