[INFO] fetching crate mlsub 0.1.0...
[INFO] testing mlsub-0.1.0 against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] extracting crate mlsub 0.1.0 into /workspace/builds/worker-47/source
[INFO] validating manifest of crates.io crate mlsub 0.1.0 on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "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-47/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2fc10cd1c0075fa6c56b9e79b4308ecaba88dab485d1f52bf5430fe7d570fb7f
[INFO] running `Command { std: "docker" "start" "-a" "2fc10cd1c0075fa6c56b9e79b4308ecaba88dab485d1f52bf5430fe7d570fb7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2fc10cd1c0075fa6c56b9e79b4308ecaba88dab485d1f52bf5430fe7d570fb7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fc10cd1c0075fa6c56b9e79b4308ecaba88dab485d1f52bf5430fe7d570fb7f", kill_on_drop: false }`
[INFO] [stdout] 2fc10cd1c0075fa6c56b9e79b4308ecaba88dab485d1f52bf5430fe7d570fb7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ffbf964751465cb9580d2bfe2263fdfd7b9fb2999ea117cb50233a4cd7ba5a97
[INFO] running `Command { std: "docker" "start" "-a" "ffbf964751465cb9580d2bfe2263fdfd7b9fb2999ea117cb50233a4cd7ba5a97", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling smallvec v1.7.0
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling seahash v4.1.0
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling bitmaps v2.1.0
[INFO] [stderr]    Compiling small-ord-set v0.1.3
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling im v15.0.0
[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 5.64s
[INFO] running `Command { std: "docker" "inspect" "ffbf964751465cb9580d2bfe2263fdfd7b9fb2999ea117cb50233a4cd7ba5a97", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffbf964751465cb9580d2bfe2263fdfd7b9fb2999ea117cb50233a4cd7ba5a97", kill_on_drop: false }`
[INFO] [stdout] ffbf964751465cb9580d2bfe2263fdfd7b9fb2999ea117cb50233a4cd7ba5a97
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cac385035b431a917a92ab8ba1066da483f419ae7b4cd64f292dced1255feaf5
[INFO] running `Command { std: "docker" "start" "-a" "cac385035b431a917a92ab8ba1066da483f419ae7b4cd64f292dced1255feaf5", kill_on_drop: false }`
[INFO] [stderr]    Compiling ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling iter-set v2.0.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling rand_xorshift v0.2.0
[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_core v0.6.3
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling tempfile v3.2.0
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling rand_distr v0.3.0
[INFO] [stderr]    Compiling proptest v0.10.1
[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 15.42s
[INFO] running `Command { std: "docker" "inspect" "cac385035b431a917a92ab8ba1066da483f419ae7b4cd64f292dced1255feaf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cac385035b431a917a92ab8ba1066da483f419ae7b4cd64f292dced1255feaf5", kill_on_drop: false }`
[INFO] [stdout] cac385035b431a917a92ab8ba1066da483f419ae7b4cd64f292dced1255feaf5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-47/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1ad1c5d895d5c2264e4aebae2609f6738d509dd3c1a09c962da7637518719f6f
[INFO] running `Command { std: "docker" "start" "-a" "1ad1c5d895d5c2264e4aebae2609f6738d509dd3c1a09c962da7637518719f6f", 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 0.27s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mlsub-973efa139c6d248d)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test biunify::tests::constructed ... ok
[INFO] [stdout] test tests::arbitrary::polar_neg ... ok
[INFO] [stdout] test tests::arbitrary::polar_pos ... 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 19.26s
[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" "1ad1c5d895d5c2264e4aebae2609f6738d509dd3c1a09c962da7637518719f6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1ad1c5d895d5c2264e4aebae2609f6738d509dd3c1a09c962da7637518719f6f", kill_on_drop: false }`
[INFO] [stdout] 1ad1c5d895d5c2264e4aebae2609f6738d509dd3c1a09c962da7637518719f6f