[INFO] fetching crate cowstr 1.3.0...
[INFO] testing cowstr-1.3.0 against beta-2025-09-21 for beta-1.91-3
[INFO] extracting crate cowstr 1.3.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate cowstr 1.3.0
[INFO] finished tweaking crates.io crate cowstr 1.3.0
[INFO] tweaked toml for crates.io crate cowstr 1.3.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cowstr 1.3.0 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 13 packages to latest compatible versions
[INFO] [stderr]       Adding code-product v0.3.0 (available: v0.4.2)
[INFO] [stderr]       Adding constptr v0.2.0 (available: v0.3.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dab539e5b41958b20690220a7b194c2eb7288a6a2289a7ea44ff311e191d237d
[INFO] running `Command { std: "docker" "start" "-a" "dab539e5b41958b20690220a7b194c2eb7288a6a2289a7ea44ff311e191d237d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dab539e5b41958b20690220a7b194c2eb7288a6a2289a7ea44ff311e191d237d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dab539e5b41958b20690220a7b194c2eb7288a6a2289a7ea44ff311e191d237d", kill_on_drop: false }`
[INFO] [stdout] dab539e5b41958b20690220a7b194c2eb7288a6a2289a7ea44ff311e191d237d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 36860a69f3c9073dad3d7e771f2401236b06e1f3ecabdbb3fce976d72315e5b2
[INFO] running `Command { std: "docker" "start" "-a" "36860a69f3c9073dad3d7e771f2401236b06e1f3ecabdbb3fce976d72315e5b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling mutants v0.0.3
[INFO] [stderr]    Compiling constptr v0.2.0
[INFO] [stderr]    Compiling code-product-lib v0.3.0
[INFO] [stderr]    Compiling code-product-macro v0.3.0
[INFO] [stderr]    Compiling code-product v0.3.0
[INFO] [stderr]    Compiling cowstr v1.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `NotSend` is never constructed
[INFO] [stdout]     --> src/cowstr.rs:1836:8
[INFO] [stdout]      |
[INFO] [stdout] 1836 | struct NotSend(std::marker::PhantomData<*const ()>);
[INFO] [stdout]      |        ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.37s
[INFO] running `Command { std: "docker" "inspect" "36860a69f3c9073dad3d7e771f2401236b06e1f3ecabdbb3fce976d72315e5b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "36860a69f3c9073dad3d7e771f2401236b06e1f3ecabdbb3fce976d72315e5b2", kill_on_drop: false }`
[INFO] [stdout] 36860a69f3c9073dad3d7e771f2401236b06e1f3ecabdbb3fce976d72315e5b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a86e33f8750c5af840425e746e98fddd8d4a3cf3673fdcebb115b8d4c787810b
[INFO] running `Command { std: "docker" "start" "-a" "a86e33f8750c5af840425e746e98fddd8d4a3cf3673fdcebb115b8d4c787810b", kill_on_drop: false }`
[INFO] [stdout] warning: struct `NotSend` is never constructed
[INFO] [stdout]     --> src/cowstr.rs:1836:8
[INFO] [stdout]      |
[INFO] [stdout] 1836 | struct NotSend(std::marker::PhantomData<*const ()>);
[INFO] [stdout]      |        ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cowstr v1.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `nightly_assert_matches`
[INFO] [stdout]  --> tests/substr.rs:1:13
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature = "nightly_assert_matches", feature(assert_matches))]
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `default`, `nightly`, `nightly_extend_one`, `nightly_fmt_internals`, `nightly_int_roundings`, and `serde`
[INFO] [stdout]   = help: consider adding `nightly_assert_matches` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `nightly_assert_matches`
[INFO] [stdout]  --> tests/substr.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | #[cfg(feature = "nightly_assert_matches")]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `default`, `nightly`, `nightly_extend_one`, `nightly_fmt_internals`, `nightly_int_roundings`, and `serde`
[INFO] [stdout]   = help: consider adding `nightly_assert_matches` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `nightly_assert_matches`
[INFO] [stdout]  --> tests/cowstr.rs:2:13
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![cfg_attr(feature = "nightly_assert_matches", feature(assert_matches))]
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `default`, `nightly`, `nightly_extend_one`, `nightly_fmt_internals`, `nightly_int_roundings`, and `serde`
[INFO] [stdout]   = help: consider adding `nightly_assert_matches` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `nightly_assert_matches`
[INFO] [stdout]  --> tests/cowstr.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | #[cfg(feature = "nightly_assert_matches")]
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected values for `feature` are: `default`, `nightly`, `nightly_extend_one`, `nightly_fmt_internals`, `nightly_int_roundings`, and `serde`
[INFO] [stdout]   = help: consider adding `nightly_assert_matches` as a feature in `Cargo.toml`
[INFO] [stdout]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for the crate
[INFO] [stdout]    --> tests/substr.rs:1:1
[INFO] [stdout]     |
[INFO] [stdout]   1 | / #![cfg_attr(feature = "nightly_assert_matches", feature(assert_matches))]
[INFO] [stdout]   2 | |
[INFO] [stdout]   3 | | #[cfg(feature = "nightly_assert_matches")]
[INFO] [stdout]   4 | | use std::assert_matches::assert_matches;
[INFO] [stdout] ...   |
[INFO] [stdout] 866 | |     assert_eq!(s.as_bytes()[9], b'd');
[INFO] [stdout] 867 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-W missing-docs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for the crate
[INFO] [stdout]    --> tests/cowstr.rs:1:1
[INFO] [stdout]     |
[INFO] [stdout]   1 | / #![allow(clippy::should_panic_without_expect)]
[INFO] [stdout]   2 | | #![cfg_attr(feature = "nightly_assert_matches", feature(assert_matches))]
[INFO] [stdout]   3 | |
[INFO] [stdout]   4 | | #[cfg(feature = "nightly_assert_matches")]
[INFO] [stdout] ...   |
[INFO] [stdout] 875 | |     assert_eq!(s.as_bytes()[9], b'd');
[INFO] [stdout] 876 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-W missing-docs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for the crate
[INFO] [stdout]   --> tests/substr_threads.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout]  1 | / use std::thread;
[INFO] [stdout]  2 | |
[INFO] [stdout]  3 | | use cowstr::*;
[INFO] [stdout] ...  |
[INFO] [stdout] 13 | |     thread.join().expect("success");
[INFO] [stdout] 14 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-W missing-docs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: missing documentation for the crate
[INFO] [stdout]   --> tests/cowstr_threads.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout]  1 | / use std::thread;
[INFO] [stdout]  2 | |
[INFO] [stdout]  3 | | use cowstr::*;
[INFO] [stdout] ...  |
[INFO] [stdout] 55 | |     assert!(thread.join().is_ok());
[INFO] [stdout] 56 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-W missing-docs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NotSend` is never constructed
[INFO] [stdout]     --> src/cowstr.rs:1836:8
[INFO] [stdout]      |
[INFO] [stdout] 1836 | struct NotSend(std::marker::PhantomData<*const ()>);
[INFO] [stdout]      |        ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.75s
[INFO] running `Command { std: "docker" "inspect" "a86e33f8750c5af840425e746e98fddd8d4a3cf3673fdcebb115b8d4c787810b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a86e33f8750c5af840425e746e98fddd8d4a3cf3673fdcebb115b8d4c787810b", kill_on_drop: false }`
[INFO] [stdout] a86e33f8750c5af840425e746e98fddd8d4a3cf3673fdcebb115b8d4c787810b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 76b5b65c5af2ba2ed0ac679dccd36d8e8879d4eb2f9fe63ee4faf23305be1b1e
[INFO] running `Command { std: "docker" "start" "-a" "76b5b65c5af2ba2ed0ac679dccd36d8e8879d4eb2f9fe63ee4faf23305be1b1e", kill_on_drop: false }`
[INFO] [stderr] warning: struct `NotSend` is never constructed
[INFO] [stderr]     --> src/cowstr.rs:1836:8
[INFO] [stderr]      |
[INFO] [stderr] 1836 | struct NotSend(std::marker::PhantomData<*const ()>);
[INFO] [stderr]      |        ^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `cowstr` (lib) generated 1 warning
[INFO] [stderr] warning: `cowstr` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr] warning: unexpected `cfg` condition value: `nightly_assert_matches`
[INFO] [stderr]  --> tests/cowstr.rs:2:13
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![cfg_attr(feature = "nightly_assert_matches", feature(assert_matches))]
[INFO] [stderr]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: expected values for `feature` are: `default`, `nightly`, `nightly_extend_one`, `nightly_fmt_internals`, `nightly_int_roundings`, and `serde`
[INFO] [stderr]   = help: consider adding `nightly_assert_matches` as a feature in `Cargo.toml`
[INFO] [stderr]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition value: `nightly_assert_matches`
[INFO] [stderr]  --> tests/cowstr.rs:4:7
[INFO] [stderr]   |
[INFO] [stderr] 4 | #[cfg(feature = "nightly_assert_matches")]
[INFO] [stderr]   |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: expected values for `feature` are: `default`, `nightly`, `nightly_extend_one`, `nightly_fmt_internals`, `nightly_int_roundings`, and `serde`
[INFO] [stderr]   = help: consider adding `nightly_assert_matches` as a feature in `Cargo.toml`
[INFO] [stderr]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr] 
[INFO] [stderr] warning: missing documentation for the crate
[INFO] [stderr]    --> tests/cowstr.rs:1:1
[INFO] [stderr]     |
[INFO] [stderr]   1 | / #![allow(clippy::should_panic_without_expect)]
[INFO] [stderr]   2 | | #![cfg_attr(feature = "nightly_assert_matches", feature(assert_matches))]
[INFO] [stderr]   3 | |
[INFO] [stderr]   4 | | #[cfg(feature = "nightly_assert_matches")]
[INFO] [stderr] ...   |
[INFO] [stderr] 875 | |     assert_eq!(s.as_bytes()[9], b'd');
[INFO] [stderr] 876 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: requested on the command line with `-W missing-docs`
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition value: `nightly_assert_matches`
[INFO] [stderr]  --> tests/substr.rs:1:13
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(feature = "nightly_assert_matches", feature(assert_matches))]
[INFO] [stderr]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: expected values for `feature` are: `default`, `nightly`, `nightly_extend_one`, `nightly_fmt_internals`, `nightly_int_roundings`, and `serde`
[INFO] [stderr]   = help: consider adding `nightly_assert_matches` as a feature in `Cargo.toml`
[INFO] [stderr]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr]   = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unexpected `cfg` condition value: `nightly_assert_matches`
[INFO] [stderr]  --> tests/substr.rs:3:7
[INFO] [stderr]   |
[INFO] [stderr] 3 | #[cfg(feature = "nightly_assert_matches")]
[INFO] [stderr]   |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: expected values for `feature` are: `default`, `nightly`, `nightly_extend_one`, `nightly_fmt_internals`, `nightly_int_roundings`, and `serde`
[INFO] [stderr]   = help: consider adding `nightly_assert_matches` as a feature in `Cargo.toml`
[INFO] [stderr]   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stderr] 
[INFO] [stderr] warning: missing documentation for the crate
[INFO] [stderr]    --> tests/substr.rs:1:1
[INFO] [stderr]     |
[INFO] [stderr]   1 | / #![cfg_attr(feature = "nightly_assert_matches", feature(assert_matches))]
[INFO] [stderr]   2 | |
[INFO] [stderr]   3 | | #[cfg(feature = "nightly_assert_matches")]
[INFO] [stderr]   4 | | use std::assert_matches::assert_matches;
[INFO] [stderr] ...   |
[INFO] [stderr] 866 | |     assert_eq!(s.as_bytes()[9], b'd');
[INFO] [stderr] 867 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: requested on the command line with `-W missing-docs`
[INFO] [stderr] 
[INFO] [stderr] warning: missing documentation for the crate
[INFO] [stderr]   --> tests/cowstr_threads.rs:1:1
[INFO] [stderr]    |
[INFO] [stderr]  1 | / use std::thread;
[INFO] [stderr]  2 | |
[INFO] [stderr]  3 | | use cowstr::*;
[INFO] [stderr] ...  |
[INFO] [stderr] 55 | |     assert!(thread.join().is_ok());
[INFO] [stderr] 56 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: requested on the command line with `-W missing-docs`
[INFO] [stderr] 
[INFO] [stderr] warning: missing documentation for the crate
[INFO] [stderr]   --> tests/substr_threads.rs:1:1
[INFO] [stderr]    |
[INFO] [stderr]  1 | / use std::thread;
[INFO] [stderr]  2 | |
[INFO] [stderr]  3 | | use cowstr::*;
[INFO] [stderr] ...  |
[INFO] [stderr] 13 | |     thread.join().expect("success");
[INFO] [stderr] 14 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: requested on the command line with `-W missing-docs`
[INFO] [stderr] 
[INFO] [stderr] warning: `cowstr` (test "cowstr") generated 3 warnings
[INFO] [stderr] warning: `cowstr` (test "substr") generated 3 warnings
[INFO] [stderr] warning: `cowstr` (test "cowstr_threads") generated 1 warning
[INFO] [stderr] warning: `cowstr` (test "substr_threads") generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/cowstr-821626d247874566)
[INFO] [stdout] 
[INFO] [stdout] running 53 tests
[INFO] [stdout] test cowstr::add ... ok
[INFO] [stdout] test cowstr::as_mut_str ... ok
[INFO] [stdout] test cowstr::add_assign ... ok
[INFO] [stdout] test cowstr::debug ... ignored
[INFO] [stdout] test cowstr::cmp ... ok
[INFO] [stdout] test cowstr::from ... ok
[INFO] [stdout] test cowstr::clone_static ... ok
[INFO] [stdout] test cowstr::extend ... ok
[INFO] [stdout] test cowstr::as_str_static ... ok
[INFO] [stdout] test cowstr::as_mut ... ok
[INFO] [stdout] test cowstr::as_str_dynamic ... ok
[INFO] [stdout] test cowstr::borrow_mut ... ok
[INFO] [stdout] test cowstr::clone_dynamic ... ok
[INFO] [stdout] test cowstr::deref_mut ... ok
[INFO] [stdout] test cowstr::as_ref ... ok
[INFO] [stdout] test cowstr::index ... ok
[INFO] [stdout] test cowstr::index_mut ... ok
[INFO] [stdout] test cowstr::ord ... ok
[INFO] [stdout] test cowstr::print ... ignored
[INFO] [stdout] test cowstr::push ... ok
[INFO] [stdout] test cowstr::partial_ord ... ok
[INFO] [stdout] test cowstr::read_chars ... ok
[INFO] [stdout] test cowstr::replace_range ... ok
[INFO] [stdout] test cowstr::to_cowstr ... ok
[INFO] [stdout] test cowstr::try_read_chars ... ok
[INFO] [stdout] test pushguard::drop_guard ... ok
[INFO] [stdout] test pushguard::deref ... ok
[INFO] [stdout] test cowstr::push_str ... ok
[INFO] [stdout] test pushguard::try_push_str ... ok
[INFO] [stdout] test substr::borrow ... ok
[INFO] [stdout] test substr::as_ref ... ok
[INFO] [stdout] test substr::debug ... ignored
[INFO] [stdout] test cowstr::from_iterator ... ok
[INFO] [stdout] test substr::clone_increments_refcount ... ok
[INFO] [stdout] test substr::deref_static_dynamic ... ok
[INFO] [stdout] test cowstr::partial_eq ... ok
[INFO] [stdout] test substr::different_origin ... ok
[INFO] [stdout] test pushguard::try_push ... ok
[INFO] [stdout] test substr::empty ... ok
[INFO] [stdout] test substr::deref_static_static ... ok
[INFO] [stdout] test substr::partial_ord ... ok
[INFO] [stdout] test substr::from ... ok
[INFO] [stdout] test cowstr::size ... ok
[INFO] [stdout] test cowstr::smoke ... ok
[INFO] [stdout] test substr::index ... ok
[INFO] [stdout] test substr::partial_eq ... ok
[INFO] [stdout] test substr::same_origin ... ok
[INFO] [stdout] test cowstr::borrow ... ok
[INFO] [stdout] test substr::from_ref ... ok
[INFO] [stdout] test cowstr::replicate ... ok
[INFO] [stdout] test cowstr::over_capacity - should panic ... ok
[INFO] [stderr]      Running tests/cowstr.rs (/opt/rustwide/target/debug/deps/cowstr-956c775fd36edef6)
[INFO] [stdout] test substr::from_panic - should panic ... ok
[INFO] [stdout] test pushguard::two_guard - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 50 passed; 0 failed; 3 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 29 tests
[INFO] [stdout] test insert ... ok
[INFO] [stdout] test remove ... ok
[INFO] [stdout] test test_add_assign ... ok
[INFO] [stdout] test test_extend_ref ... ok
[INFO] [stdout] test test_from_char ... ok
[INFO] [stdout] test test_from_str ... ok
[INFO] [stdout] test test_pop ... ok
[INFO] [stdout] test test_push ... ok
[INFO] [stdout] test test_push_str ... ok
[INFO] [stdout] test test_replace_range ... ok
[INFO] [stdout] test test_replace_range_empty ... ok
[INFO] [stdout] test test_replace_range_inclusive_range ... ok
[INFO] [stdout] test test_simple_types ... ok
[INFO] [stdout] test test_str_add ... ok
[INFO] [stdout] test test_str_truncate ... ok
[INFO] [stdout] test test_unsized_to_string ... ok
[INFO] [stdout] test test_str_truncate_invalid_len ... ok
[INFO] [stdout] test test_str_clear ... ok
[INFO] [stdout] test test_slicing ... ok
[INFO] [stdout] test test_vectors ... ok
[INFO] [stdout] test test_str_concat ... ok
[INFO] [stdout] test test_replace_range_unbounded ... ok
[INFO] [stdout] test insert_bad2 - should panic ... ok
[INFO] [stdout] test insert_bad1 - should panic ... ok
[INFO] [stdout] test remove_bad - should panic ... ok
[INFO] [stdout] test test_replace_range_char_boundary - should panic ... ok
[INFO] [stdout] test test_replace_range_inclusive_out_of_bounds - should panic ... ok
[INFO] [stdout] test test_replace_range_out_of_bounds - should panic ... ok
[INFO] [stdout] test test_str_truncate_split_codepoint - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 29 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/cowstr_threads.rs (/opt/rustwide/target/debug/deps/cowstr_threads-53b421297309fd52)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test smoke ... ok
[INFO] [stdout] test mutate_clone_return ... ok
[INFO] [stdout] test mutate_return ... ok
[INFO] [stdout] test double_guard_in_thread - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running tests/substr.rs (/opt/rustwide/target/debug/deps/substr-ed85be968e5ed81c)
[INFO] [stdout] running 6 tests
[INFO] [stdout] test test_from_str ... ok
[INFO] [stdout] test test_slicing ... ok
[INFO] [stdout] test test_str_concat ... ok
[INFO] [stdout] test test_unsized_to_string ... ok
[INFO] [stdout] test test_from_char ... ok
[INFO] [stderr]      Running tests/substr_threads.rs (/opt/rustwide/target/debug/deps/substr_threads-31530bcc75dc1f5f)
[INFO] [stdout] test test_simple_types ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests cowstr
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test smoke ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 38 tests
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::leak (line 810) ... ignored
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::clear (line 609) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::replace_range (line 706) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::remove (line 676) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::is_same_as (line 497) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::capacity (line 331) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::format (line 103) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::is_empty (line 560) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::pop (line 585) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::insert_str (line 751) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::len (line 540) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::from_chars (line 862) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::reserve (line 374) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::as_bytes (line 481) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::insert (line 779) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::format (line 92) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::guard (line 264) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::shrink_to (line 430) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::set_static (line 149) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::truncate (line 642) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::end_to_end_of (line 347) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::origin_after (line 210) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::deref_static (line 398) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::ToCowStr::to_cowstr (line 1907) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::spare_capacity (line 350) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::format (line 1879) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::range_of (line 519) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::from_range (line 87) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::from_static (line 378) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::end_to_start_of (line 314) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::origin_before (line 179) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::from_contained_str (line 56) ... ok
[INFO] [stdout] test src/cowstr.rs - cowstr::CowStr::shrink_clone (line 462) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::start_to_start_of (line 247) ... ok
[INFO] [stdout] test src/substr.rs - substr::ToSubStr::to_substr (line 827) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::sub_range_inplace (line 159) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::start_to_end_of (line 281) ... ok
[INFO] [stdout] test src/substr.rs - substr::SubStr::sub_range (line 127) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 37 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 2.03s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "76b5b65c5af2ba2ed0ac679dccd36d8e8879d4eb2f9fe63ee4faf23305be1b1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76b5b65c5af2ba2ed0ac679dccd36d8e8879d4eb2f9fe63ee4faf23305be1b1e", kill_on_drop: false }`
[INFO] [stdout] 76b5b65c5af2ba2ed0ac679dccd36d8e8879d4eb2f9fe63ee4faf23305be1b1e