[INFO] fetching crate mlsub 0.1.0...
[INFO] testing mlsub-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate mlsub 0.1.0 into /workspace/builds/worker-68/source
[INFO] validating manifest of crates.io crate mlsub 0.1.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mlsub 0.1.0
[INFO] finished tweaking crates.io crate mlsub 0.1.0
[INFO] tweaked toml for crates.io crate mlsub 0.1.0 written to /workspace/builds/worker-68/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e46f933800004dfd4e37206bbac18e60020e124719a86da90a5974d60a9ed48e
[INFO] running `Command { std: "docker" "start" "-a" "e46f933800004dfd4e37206bbac18e60020e124719a86da90a5974d60a9ed48e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e46f933800004dfd4e37206bbac18e60020e124719a86da90a5974d60a9ed48e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e46f933800004dfd4e37206bbac18e60020e124719a86da90a5974d60a9ed48e", kill_on_drop: false }`
[INFO] [stdout] e46f933800004dfd4e37206bbac18e60020e124719a86da90a5974d60a9ed48e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c476b7bf5dae3518284588f9d411e05a840819c37ef98ebec7708b93474673d
[INFO] running `Command { std: "docker" "start" "-a" "3c476b7bf5dae3518284588f9d411e05a840819c37ef98ebec7708b93474673d", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling seahash v4.1.0
[INFO] [stderr]    Compiling im v15.0.0
[INFO] [stderr]    Compiling small-ord-set v0.1.3
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling bitmaps v2.1.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling sized-chunks v0.6.5
[INFO] [stderr]    Compiling mlsub v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/subsume/mod.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             unimplemented!();
[INFO] [stdout]    |             ----------------- any code following this expression is unreachable
[INFO] [stdout] 46 | 
[INFO] [stdout] 47 |             self.remove_flow(pair);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.44s
[INFO] running `Command { std: "docker" "inspect" "3c476b7bf5dae3518284588f9d411e05a840819c37ef98ebec7708b93474673d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c476b7bf5dae3518284588f9d411e05a840819c37ef98ebec7708b93474673d", kill_on_drop: false }`
[INFO] [stdout] 3c476b7bf5dae3518284588f9d411e05a840819c37ef98ebec7708b93474673d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 775faa7d8ba00101240880d42caf838cc8a033cb69bc64e7c7f895a35d9e541d
[INFO] running `Command { std: "docker" "start" "-a" "775faa7d8ba00101240880d42caf838cc8a033cb69bc64e7c7f895a35d9e541d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling iter-set v2.0.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_xorshift v0.2.0
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/subsume/mod.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             unimplemented!();
[INFO] [stdout]    |             ----------------- any code following this expression is unreachable
[INFO] [stdout] 46 | 
[INFO] [stdout] 47 |             self.remove_flow(pair);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling proptest v0.10.1
[INFO] [stderr]    Compiling rand_distr v0.3.0
[INFO] [stderr]    Compiling mlsub v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/subsume/mod.rs:47:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             unimplemented!();
[INFO] [stdout]    |             ----------------- any code following this expression is unreachable
[INFO] [stdout] 46 | 
[INFO] [stdout] 47 |             self.remove_flow(pair);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 20.11s
[INFO] running `Command { std: "docker" "inspect" "775faa7d8ba00101240880d42caf838cc8a033cb69bc64e7c7f895a35d9e541d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "775faa7d8ba00101240880d42caf838cc8a033cb69bc64e7c7f895a35d9e541d", kill_on_drop: false }`
[INFO] [stdout] 775faa7d8ba00101240880d42caf838cc8a033cb69bc64e7c7f895a35d9e541d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 185a042e8a09dada683ce366dc37d71462ea5c582c7254b36fc220732f96f6cc
[INFO] running `Command { std: "docker" "start" "-a" "185a042e8a09dada683ce366dc37d71462ea5c582c7254b36fc220732f96f6cc", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/subsume/mod.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 45 |             unimplemented!();
[INFO] [stderr]    |             ----------------- any code following this expression is unreachable
[INFO] [stderr] 46 | 
[INFO] [stderr] 47 |             self.remove_flow(pair);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `mlsub` (lib) generated 1 warning
[INFO] [stderr] warning: `mlsub` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mlsub-f6937f93df4d5240)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test biunify::tests::constructed ... ok
[INFO] [stdout] test tests::arbitrary::polar_pos ... ok
[INFO] [stdout] test tests::arbitrary::polar_neg ... ok
[INFO] [stdout] test tests::arbitrary::auto_neg ... ok
[INFO] [stdout] test tests::arbitrary::auto_pos ... ok
[INFO] [stdout] test auto::reduce::tests::reduce_one_neg ... ok
[INFO] [stdout] test auto::reduce::tests::reduce_one_pos ... ok
[INFO] [stdout] test biunify::tests::biunify ... ok
[INFO] [stdout] test biunify::tests::biunify_reduced ... ok
[INFO] [stdout] test biunify::tests::biunify_all ... ok
[INFO] [stdout] test biunify::tests::biunify_all_reduced ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 19.77s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mlsub
[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" "185a042e8a09dada683ce366dc37d71462ea5c582c7254b36fc220732f96f6cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "185a042e8a09dada683ce366dc37d71462ea5c582c7254b36fc220732f96f6cc", kill_on_drop: false }`
[INFO] [stdout] 185a042e8a09dada683ce366dc37d71462ea5c582c7254b36fc220732f96f6cc