[INFO] fetching crate polyhorn-channel 0.3.2...
[INFO] testing polyhorn-channel-0.3.2 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate polyhorn-channel 0.3.2 into /workspace/builds/worker-51/source
[INFO] validating manifest of crates.io crate polyhorn-channel 0.3.2 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate polyhorn-channel 0.3.2
[INFO] finished tweaking crates.io crate polyhorn-channel 0.3.2
[INFO] tweaked toml for crates.io crate polyhorn-channel 0.3.2 written to /workspace/builds/worker-51/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d559e4932d63eb8fabed250bf5038b3479c24e15d3e3bcb54e24c4ec080a6651
[INFO] running `Command { std: "docker" "start" "-a" "d559e4932d63eb8fabed250bf5038b3479c24e15d3e3bcb54e24c4ec080a6651", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d559e4932d63eb8fabed250bf5038b3479c24e15d3e3bcb54e24c4ec080a6651", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d559e4932d63eb8fabed250bf5038b3479c24e15d3e3bcb54e24c4ec080a6651", kill_on_drop: false }`
[INFO] [stdout] d559e4932d63eb8fabed250bf5038b3479c24e15d3e3bcb54e24c4ec080a6651
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23c49caf07364b7543b8b85c37869f940cc74721e38a85ed8273524f76802839
[INFO] running `Command { std: "docker" "start" "-a" "23c49caf07364b7543b8b85c37869f940cc74721e38a85ed8273524f76802839", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling futures-executor v0.3.17
[INFO] [stderr]    Compiling futures v0.3.17
[INFO] [stderr]    Compiling polyhorn-core v0.3.2
[INFO] [stderr]    Compiling polyhorn-channel v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.07s
[INFO] running `Command { std: "docker" "inspect" "23c49caf07364b7543b8b85c37869f940cc74721e38a85ed8273524f76802839", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23c49caf07364b7543b8b85c37869f940cc74721e38a85ed8273524f76802839", kill_on_drop: false }`
[INFO] [stdout] 23c49caf07364b7543b8b85c37869f940cc74721e38a85ed8273524f76802839
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b7a42734666de06b07455ee6bbce8f9d9e6ab1f7377eeff182232435ab492092
[INFO] running `Command { std: "docker" "start" "-a" "b7a42734666de06b07455ee6bbce8f9d9e6ab1f7377eeff182232435ab492092", kill_on_drop: false }`
[INFO] [stderr]    Compiling polyhorn-channel v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.41s
[INFO] running `Command { std: "docker" "inspect" "b7a42734666de06b07455ee6bbce8f9d9e6ab1f7377eeff182232435ab492092", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b7a42734666de06b07455ee6bbce8f9d9e6ab1f7377eeff182232435ab492092", kill_on_drop: false }`
[INFO] [stdout] b7a42734666de06b07455ee6bbce8f9d9e6ab1f7377eeff182232435ab492092
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 557150f2269f37e84fb89a3c40d6fcbf9ec65be855557582a7a0b30762c0ede9
[INFO] running `Command { std: "docker" "start" "-a" "557150f2269f37e84fb89a3c40d6fcbf9ec65be855557582a7a0b30762c0ede9", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.17s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/polyhorn_channel-1588b964fa121f4e)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests polyhorn-channel
[INFO] [stdout] test result: ok. 0 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" "557150f2269f37e84fb89a3c40d6fcbf9ec65be855557582a7a0b30762c0ede9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "557150f2269f37e84fb89a3c40d6fcbf9ec65be855557582a7a0b30762c0ede9", kill_on_drop: false }`
[INFO] [stdout] 557150f2269f37e84fb89a3c40d6fcbf9ec65be855557582a7a0b30762c0ede9