[INFO] fetching crate signalo 0.6.0...
[INFO] testing signalo-0.6.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate signalo 0.6.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate signalo 0.6.0 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 signalo 0.6.0
[INFO] finished tweaking crates.io crate signalo 0.6.0
[INFO] tweaked toml for crates.io crate signalo 0.6.0 written to /workspace/builds/worker-8/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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded signalo_pipes v0.5.1
[INFO] [stderr]   Downloaded signalo_sources v0.5.2
[INFO] [stderr]   Downloaded signalo_filters v0.6.0
[INFO] [stderr]   Downloaded signalo_sinks v0.5.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] a2dde47294fbf19e5893bb2f47fa0df3a25152ae0d163736b7d49f5a7be80218
[INFO] running `Command { std: "docker" "start" "-a" "a2dde47294fbf19e5893bb2f47fa0df3a25152ae0d163736b7d49f5a7be80218", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2dde47294fbf19e5893bb2f47fa0df3a25152ae0d163736b7d49f5a7be80218", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2dde47294fbf19e5893bb2f47fa0df3a25152ae0d163736b7d49f5a7be80218", kill_on_drop: false }`
[INFO] [stdout] a2dde47294fbf19e5893bb2f47fa0df3a25152ae0d163736b7d49f5a7be80218
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] e0f9f56de2a3b8a5d0b30ea0b2b9c344ace86ca7e3870f828a0c6ef4ddf90932
[INFO] running `Command { std: "docker" "start" "-a" "e0f9f56de2a3b8a5d0b30ea0b2b9c344ace86ca7e3870f828a0c6ef4ddf90932", kill_on_drop: false }`
[INFO] [stderr]    Compiling replace_with v0.1.7
[INFO] [stderr]    Compiling guts v0.1.1
[INFO] [stderr]    Compiling signalo_traits v0.5.0
[INFO] [stderr]    Compiling signalo_sources v0.5.2
[INFO] [stderr]    Compiling signalo_pipes v0.5.1
[INFO] [stderr]    Compiling signalo_filters v0.6.0
[INFO] [stderr]    Compiling signalo_sinks v0.5.2
[INFO] [stderr]    Compiling signalo v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.22s
[INFO] running `Command { std: "docker" "inspect" "e0f9f56de2a3b8a5d0b30ea0b2b9c344ace86ca7e3870f828a0c6ef4ddf90932", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0f9f56de2a3b8a5d0b30ea0b2b9c344ace86ca7e3870f828a0c6ef4ddf90932", kill_on_drop: false }`
[INFO] [stdout] e0f9f56de2a3b8a5d0b30ea0b2b9c344ace86ca7e3870f828a0c6ef4ddf90932
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 458d22467ee5a7d72d4bcf22eb04b6c2f50b9b28bc10776933ba4fa65f2c99cf
[INFO] running `Command { std: "docker" "start" "-a" "458d22467ee5a7d72d4bcf22eb04b6c2f50b9b28bc10776933ba4fa65f2c99cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling signalo v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "458d22467ee5a7d72d4bcf22eb04b6c2f50b9b28bc10776933ba4fa65f2c99cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "458d22467ee5a7d72d4bcf22eb04b6c2f50b9b28bc10776933ba4fa65f2c99cf", kill_on_drop: false }`
[INFO] [stdout] 458d22467ee5a7d72d4bcf22eb04b6c2f50b9b28bc10776933ba4fa65f2c99cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 436db64e079d331f7f41d884b141dc96f6edba64d8354cb2c6a3199d7fd5f1c6
[INFO] running `Command { std: "docker" "start" "-a" "436db64e079d331f7f41d884b141dc96f6edba64d8354cb2c6a3199d7fd5f1c6", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/signalo-35f24838e584508f)
[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] [stderr]    Doc-tests signalo
[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" "436db64e079d331f7f41d884b141dc96f6edba64d8354cb2c6a3199d7fd5f1c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "436db64e079d331f7f41d884b141dc96f6edba64d8354cb2c6a3199d7fd5f1c6", kill_on_drop: false }`
[INFO] [stdout] 436db64e079d331f7f41d884b141dc96f6edba64d8354cb2c6a3199d7fd5f1c6