v25.0.1-pre3

• Fixed: Build arm64 binaries for macOS.

v25.0.1-pre2

• Fixed: Build binaries into releases.

cargo-mutants 25.0.0

• Better estimation of time remaining, based on the time taken to test mutants so far, excluding the time for the baseline.

• New: --copy-vcs option and config option will copy .git and other VCS directories, to accommodate trees whose tests depend on the contents or presence of the VCS directory.

• New: Add .jj to the list of known VCS directories. These are excluded by default when copying the tree, but can be included using --copy-vcs=true.

• Fixed: cargo --package options now include the version number of the targeted package, like [email protected]. This avoids cargo failing with an error that the package name is ambiguous in trees whose dependencies include multiple versions of one of the packages being tested.

cargo-mutants 24.11.2

• Changed: .gitignore (and other git ignore files) are only consulted when copying the tree if it is contained within a directory with a .git directory.

• Fixed: .gitignore files above the git root directory are no longer read. In particular this fixes the problem where .gitignore * in the home directory would prevent copying any source trees.

v24.11.1

• Changed: The arguments of calls to functions or methods named with_capacity are not mutated by default. This can be turned off with --skip-calls-defaults=false on the command line or skip_calls_defaults = false in .cargo/mutants.toml.

• New: --skip-calls=NAME,NAME on the command line or skip_calls = [NAMES..] in .cargo/mutants.toml allows configuring other functions whose calls should never be mutated.

Download cargo-mutants 24.11.1

File	Platform	Checksum
cargo-mutants-aarch64-apple-darwin.tar.xz	Apple Silicon macOS	checksum
cargo-mutants-x86_64-apple-darwin.tar.xz	Intel macOS	checksum
cargo-mutants-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
cargo-mutants-x86_64-unknown-linux-gnu.tar.xz	x64 Linux	checksum

v24.11.0

24.11.0

• New: --test-workspace and --test-package arguments and config options support projects whose tests live in a different package.

• New: Mutate proc_macro targets and functions.

• New: Write diffs to dedicated files under mutants.out/diff/. The filename is included in the mutant json output.

• New: The package tarball on crates.io now includes all the test data, so that the tests can be run on the unpacked tarball. This may be helpful for people packaging cargo-mutants for distributions, and keeps an accurate record of the whole tree separate from the git history.

v24.9.0

24.9.0

• Fixed: Avoid generating empty string elements in ENCODED_RUSTFLAGS when --cap-lints is set. In some situations these could cause a compiler error complaining about the empty argument.

• New: --profile option allows selecting a Cargo profile. In particular, it's recommended that you can use --profile=mutants and configure a custom profile in your Cargo.toml to optimize the build for mutants, by turning off debug symbols.

• New: --iterate option skips mutants that were previously caught or unviable.

• New: cargo-mutants starts a GNU jobserver, shared across all children, so that running multiple --jobs does not spawn an excessive number of compiler processes. The jobserver is on by default and can be turned off with --jobserver false.

• Fixed: Don't error on diffs containing a "Binary files differ" message.

v24.7.1

• Changed: No build timeouts by default. Previously, cargo-mutants set a default build timeout based on the baseline build, but experience showed that this would sometimes make builds flaky, because build times can be quite variable. If mutants cause builds to hang, then you can still set a timeout using --build-timeout or --build-timeout-multiplier.

• Fixed: Don't error if the --in-diff file is empty.

• Changed: cargo-mutants no longer passes --cap-lints=allow to rustc. This was previously done so that mutants would not unnecessarily be unviable due to triggering compiler warnings in trees configured to deny some lints, but it had the undesirable effect of disabling rustc's detection of long running const evaluations. If your tree treats some lints as errors then the previous behavior can be restored with --cap-lints=true (or the equivalent config option), or you can use cfg_attr and a feature flag to accept those warnings when testing under cargo-mutants.

Download cargo-mutants 24.7.1

File	Platform	Checksum
cargo-mutants-aarch64-apple-darwin.tar.xz	Apple Silicon macOS	checksum
cargo-mutants-x86_64-apple-darwin.tar.xz	Intel macOS	checksum
cargo-mutants-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
cargo-mutants-x86_64-unknown-linux-gnu.tar.xz	x64 Linux	checksum

v24.7.0

Download cargo-mutants 24.7.0

File	Platform	Checksum
cargo-mutants-aarch64-apple-darwin.tar.xz	Apple Silicon macOS	checksum
cargo-mutants-x86_64-apple-darwin.tar.xz	Intel macOS	checksum
cargo-mutants-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
cargo-mutants-x86_64-unknown-linux-gnu.tar.xz	x64 Linux	checksum

v24.5.0

• Fixed: Follow path attributes on mod statements.

• New: --build-timeout and --build-timeout-multiplier options for setting timeouts for the build and check cargo phases.

• Changed: --timeout-multiplier now overrides timeout_multiplier from .cargo/mutants.toml.

• Changed: --timeout and --timeout-multiplier are now conflicting options.