[INFO] fetching crate duo 0.1.0-alpha.0...
[INFO] testing duo-0.1.0-alpha.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate duo 0.1.0-alpha.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate duo 0.1.0-alpha.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 duo 0.1.0-alpha.0
[INFO] finished tweaking crates.io crate duo 0.1.0-alpha.0
[INFO] tweaked toml for crates.io crate duo 0.1.0-alpha.0 written to /workspace/builds/worker-12/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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gimli v0.23.0
[INFO] [stderr]   Downloaded addr2line v0.14.1
[INFO] [stderr]   Downloaded numext-fixed-hash v0.1.6
[INFO] [stderr]   Downloaded numext-fixed-uint-core v0.1.6
[INFO] [stderr]   Downloaded object v0.23.0
[INFO] [stderr]   Downloaded backtrace v0.3.57
[INFO] [stderr]   Downloaded numext-constructor v0.1.6
[INFO] [stderr]   Downloaded numext-fixed-uint-hack v0.1.6
[INFO] [stderr]   Downloaded numext-fixed-hash-hack v0.1.6
[INFO] [stderr]   Downloaded numext-fixed-hash-core v0.1.6
[INFO] [stderr]   Downloaded numext-fixed-uint v0.1.6
[INFO] [stderr]   Downloaded cc v1.0.26
[INFO] [stderr]   Downloaded secp256k1 v0.12.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 0a7a61026a9c3e0ae9a6b3288bba9720f6a68643c301d8f53a7c8ca683193ea4
[INFO] running `Command { std: "docker" "start" "-a" "0a7a61026a9c3e0ae9a6b3288bba9720f6a68643c301d8f53a7c8ca683193ea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a7a61026a9c3e0ae9a6b3288bba9720f6a68643c301d8f53a7c8ca683193ea4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a7a61026a9c3e0ae9a6b3288bba9720f6a68643c301d8f53a7c8ca683193ea4", kill_on_drop: false }`
[INFO] [stdout] 0a7a61026a9c3e0ae9a6b3288bba9720f6a68643c301d8f53a7c8ca683193ea4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 126b582bfc21d63f4e70daf66bfaee77379470cec934a7f40cc0cc34538cd448
[INFO] running `Command { std: "docker" "start" "-a" "126b582bfc21d63f4e70daf66bfaee77379470cec934a7f40cc0cc34538cd448", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]    Compiling cc v1.0.26
[INFO] [stderr]    Compiling gimli v0.23.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.21
[INFO] [stderr]    Compiling object v0.23.0
[INFO] [stderr]    Compiling numext-constructor v0.1.6
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling secp256k1 v0.12.2
[INFO] [stderr]    Compiling addr2line v0.14.1
[INFO] [stderr]    Compiling backtrace v0.3.57
[INFO] [stderr]    Compiling failure v0.1.8
[INFO] [stderr]    Compiling numext-fixed-uint-core v0.1.6
[INFO] [stderr]    Compiling numext-fixed-uint-hack v0.1.6
[INFO] [stderr]    Compiling numext-fixed-uint v0.1.6
[INFO] [stderr]    Compiling numext-fixed-hash-core v0.1.6
[INFO] [stderr]    Compiling numext-fixed-hash-hack v0.1.6
[INFO] [stderr]    Compiling numext-fixed-hash v0.1.6
[INFO] [stderr]    Compiling duo v0.1.0-alpha.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 50.04s
[INFO] running `Command { std: "docker" "inspect" "126b582bfc21d63f4e70daf66bfaee77379470cec934a7f40cc0cc34538cd448", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "126b582bfc21d63f4e70daf66bfaee77379470cec934a7f40cc0cc34538cd448", kill_on_drop: false }`
[INFO] [stdout] 126b582bfc21d63f4e70daf66bfaee77379470cec934a7f40cc0cc34538cd448
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 123d028484316b175dbc65cd000e67dde0ede2a98827a020d16332c6d6d0fb0a
[INFO] running `Command { std: "docker" "start" "-a" "123d028484316b175dbc65cd000e67dde0ede2a98827a020d16332c6d6d0fb0a", kill_on_drop: false }`
[INFO] [stderr]    Compiling duo v0.1.0-alpha.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "123d028484316b175dbc65cd000e67dde0ede2a98827a020d16332c6d6d0fb0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "123d028484316b175dbc65cd000e67dde0ede2a98827a020d16332c6d6d0fb0a", kill_on_drop: false }`
[INFO] [stdout] 123d028484316b175dbc65cd000e67dde0ede2a98827a020d16332c6d6d0fb0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] ebc12bd0b3785b6ab3beb429e7556aa3cc6380422e4c7af2be6046048a98dcb5
[INFO] running `Command { std: "docker" "start" "-a" "ebc12bd0b3785b6ab3beb429e7556aa3cc6380422e4c7af2be6046048a98dcb5", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/duo-e107529747dc9974)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests duo
[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] [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" "ebc12bd0b3785b6ab3beb429e7556aa3cc6380422e4c7af2be6046048a98dcb5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebc12bd0b3785b6ab3beb429e7556aa3cc6380422e4c7af2be6046048a98dcb5", kill_on_drop: false }`
[INFO] [stdout] ebc12bd0b3785b6ab3beb429e7556aa3cc6380422e4c7af2be6046048a98dcb5