[INFO] fetching crate singleton-stepanov 1.1.0...
[INFO] testing singleton-stepanov-1.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate singleton-stepanov 1.1.0 into /workspace/builds/worker-23/source
[INFO] validating manifest of crates.io crate singleton-stepanov 1.1.0 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 singleton-stepanov 1.1.0
[INFO] finished tweaking crates.io crate singleton-stepanov 1.1.0
[INFO] tweaked toml for crates.io crate singleton-stepanov 1.1.0 written to /workspace/builds/worker-23/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-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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] bcbc6f4771bd5f5b926f0b2cf578000744ba7b82883fec60a3bd576032680c44
[INFO] running `Command { std: "docker" "start" "-a" "bcbc6f4771bd5f5b926f0b2cf578000744ba7b82883fec60a3bd576032680c44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bcbc6f4771bd5f5b926f0b2cf578000744ba7b82883fec60a3bd576032680c44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcbc6f4771bd5f5b926f0b2cf578000744ba7b82883fec60a3bd576032680c44", kill_on_drop: false }`
[INFO] [stdout] bcbc6f4771bd5f5b926f0b2cf578000744ba7b82883fec60a3bd576032680c44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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] 757cdcfcb02c96431cde9b88ca58f00b37dc3ea0c35437986577a1730e4b3621
[INFO] running `Command { std: "docker" "start" "-a" "757cdcfcb02c96431cde9b88ca58f00b37dc3ea0c35437986577a1730e4b3621", kill_on_drop: false }`
[INFO] [stderr]    Compiling singleton-stepanov v1.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "757cdcfcb02c96431cde9b88ca58f00b37dc3ea0c35437986577a1730e4b3621", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "757cdcfcb02c96431cde9b88ca58f00b37dc3ea0c35437986577a1730e4b3621", kill_on_drop: false }`
[INFO] [stdout] 757cdcfcb02c96431cde9b88ca58f00b37dc3ea0c35437986577a1730e4b3621
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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] 8cf88aeeaac163ab5d944bf74e7a1ba74dd49c0e5be60fde5780885a946a988d
[INFO] running `Command { std: "docker" "start" "-a" "8cf88aeeaac163ab5d944bf74e7a1ba74dd49c0e5be60fde5780885a946a988d", kill_on_drop: false }`
[INFO] [stderr]    Compiling singleton-stepanov v1.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "8cf88aeeaac163ab5d944bf74e7a1ba74dd49c0e5be60fde5780885a946a988d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8cf88aeeaac163ab5d944bf74e7a1ba74dd49c0e5be60fde5780885a946a988d", kill_on_drop: false }`
[INFO] [stdout] 8cf88aeeaac163ab5d944bf74e7a1ba74dd49c0e5be60fde5780885a946a988d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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] 993b5ba8ca302bbfd9214bccfa68336ea8ff6f397cc5308687e057604cf7399b
[INFO] running `Command { std: "docker" "start" "-a" "993b5ba8ca302bbfd9214bccfa68336ea8ff6f397cc5308687e057604cf7399b", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/singleton_stepanov-373973aa7b535cba)
[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 singleton-stepanov
[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" "993b5ba8ca302bbfd9214bccfa68336ea8ff6f397cc5308687e057604cf7399b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "993b5ba8ca302bbfd9214bccfa68336ea8ff6f397cc5308687e057604cf7399b", kill_on_drop: false }`
[INFO] [stdout] 993b5ba8ca302bbfd9214bccfa68336ea8ff6f397cc5308687e057604cf7399b