[INFO] fetching crate fnmutant 0.1.0...
[INFO] testing fnmutant-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate fnmutant 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate fnmutant 0.1.0
[INFO] finished tweaking crates.io crate fnmutant 0.1.0
[INFO] tweaked toml for crates.io crate fnmutant 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate fnmutant 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "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" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 227df994eef48090d199211028c8d169732823606433669daff2f136ad3bc380
[INFO] running `Command { std: "docker" "start" "-a" "227df994eef48090d199211028c8d169732823606433669daff2f136ad3bc380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "227df994eef48090d199211028c8d169732823606433669daff2f136ad3bc380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "227df994eef48090d199211028c8d169732823606433669daff2f136ad3bc380", kill_on_drop: false }`
[INFO] [stdout] 227df994eef48090d199211028c8d169732823606433669daff2f136ad3bc380
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81dcec0b1211112fa17d59516f85480781cd06c1946da0d8fd08181f0ab993b3
[INFO] running `Command { std: "docker" "start" "-a" "81dcec0b1211112fa17d59516f85480781cd06c1946da0d8fd08181f0ab993b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling fnmutant v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "81dcec0b1211112fa17d59516f85480781cd06c1946da0d8fd08181f0ab993b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81dcec0b1211112fa17d59516f85480781cd06c1946da0d8fd08181f0ab993b3", kill_on_drop: false }`
[INFO] [stdout] 81dcec0b1211112fa17d59516f85480781cd06c1946da0d8fd08181f0ab993b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1689bec4482207bf4460a66cc8f72599d641571af6c9cb4df94268d0f8478923
[INFO] running `Command { std: "docker" "start" "-a" "1689bec4482207bf4460a66cc8f72599d641571af6c9cb4df94268d0f8478923", kill_on_drop: false }`
[INFO] [stderr]    Compiling fnmutant v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/lib.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |             drop(xs);
[INFO] [stdout]    |             ^^^^^--^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `[i32; 6]`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 63 -             drop(xs);
[INFO] [stdout] 63 +             let _ = xs;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stdout]   --> src/lib.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |             drop(xs);
[INFO] [stdout]    |             ^^^^^--^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `[i32; 6]`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 70 -             drop(xs);
[INFO] [stdout] 70 +             let _ = xs;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "1689bec4482207bf4460a66cc8f72599d641571af6c9cb4df94268d0f8478923", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1689bec4482207bf4460a66cc8f72599d641571af6c9cb4df94268d0f8478923", kill_on_drop: false }`
[INFO] [stdout] 1689bec4482207bf4460a66cc8f72599d641571af6c9cb4df94268d0f8478923
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e08cd14a0ae27699b255b200bf2e8b6f4138ec12cb4992c07ffaa57f403e2e15
[INFO] running `Command { std: "docker" "start" "-a" "e08cd14a0ae27699b255b200bf2e8b6f4138ec12cb4992c07ffaa57f403e2e15", kill_on_drop: false }`
[INFO] [stderr] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stderr]   --> src/lib.rs:63:13
[INFO] [stderr]    |
[INFO] [stderr] 63 |             drop(xs);
[INFO] [stderr]    |             ^^^^^--^
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  argument has type `[i32; 6]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dropping_copy_types)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 63 -             drop(xs);
[INFO] [stderr] 63 +             let _ = xs;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: calls to `std::mem::drop` with a value that implements `Copy` does nothing
[INFO] [stderr]   --> src/lib.rs:70:13
[INFO] [stderr]    |
[INFO] [stderr] 70 |             drop(xs);
[INFO] [stderr]    |             ^^^^^--^
[INFO] [stderr]    |                  |
[INFO] [stderr]    |                  argument has type `[i32; 6]`
[INFO] [stderr]    |
[INFO] [stderr] help: use `let _ = ...` to ignore the expression or result
[INFO] [stderr]    |
[INFO] [stderr] 70 -             drop(xs);
[INFO] [stderr] 70 +             let _ = xs;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `fnmutant` (lib test) generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/fnmutant-ec96f8de8685a05d)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr]    Doc-tests fnmutant
[INFO] [stdout] test tests::it_works ... 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 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e08cd14a0ae27699b255b200bf2e8b6f4138ec12cb4992c07ffaa57f403e2e15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e08cd14a0ae27699b255b200bf2e8b6f4138ec12cb4992c07ffaa57f403e2e15", kill_on_drop: false }`
[INFO] [stdout] e08cd14a0ae27699b255b200bf2e8b6f4138ec12cb4992c07ffaa57f403e2e15