[INFO] fetching crate nth-cons-list 0.1.0...
[INFO] testing nth-cons-list-0.1.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate nth-cons-list 0.1.0 into /workspace/builds/worker-25/source
[INFO] validating manifest of crates.io crate nth-cons-list 0.1.0 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 nth-cons-list 0.1.0
[INFO] finished tweaking crates.io crate nth-cons-list 0.1.0
[INFO] tweaked toml for crates.io crate nth-cons-list 0.1.0 written to /workspace/builds/worker-25/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-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] 0f02b385400720122b28af69e3777d8c56b1109c281d143cc3cb401f84d37ee1
[INFO] running `Command { std: "docker" "start" "-a" "0f02b385400720122b28af69e3777d8c56b1109c281d143cc3cb401f84d37ee1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f02b385400720122b28af69e3777d8c56b1109c281d143cc3cb401f84d37ee1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f02b385400720122b28af69e3777d8c56b1109c281d143cc3cb401f84d37ee1", kill_on_drop: false }`
[INFO] [stdout] 0f02b385400720122b28af69e3777d8c56b1109c281d143cc3cb401f84d37ee1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] 7bc330a202253d32b63c616d3fcfe33c6d7b5b58192595a689851d0b792b0390
[INFO] running `Command { std: "docker" "start" "-a" "7bc330a202253d32b63c616d3fcfe33c6d7b5b58192595a689851d0b792b0390", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling nth-cons-list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "7bc330a202253d32b63c616d3fcfe33c6d7b5b58192595a689851d0b792b0390", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bc330a202253d32b63c616d3fcfe33c6d7b5b58192595a689851d0b792b0390", kill_on_drop: false }`
[INFO] [stdout] 7bc330a202253d32b63c616d3fcfe33c6d7b5b58192595a689851d0b792b0390
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] e57d2d03ec5c4b26359b9582fd764e2f30aa2eea68ad5826080fa3d3cc6baf74
[INFO] running `Command { std: "docker" "start" "-a" "e57d2d03ec5c4b26359b9582fd764e2f30aa2eea68ad5826080fa3d3cc6baf74", kill_on_drop: false }`
[INFO] [stderr]    Compiling nth-cons-list v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "e57d2d03ec5c4b26359b9582fd764e2f30aa2eea68ad5826080fa3d3cc6baf74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e57d2d03ec5c4b26359b9582fd764e2f30aa2eea68ad5826080fa3d3cc6baf74", kill_on_drop: false }`
[INFO] [stdout] e57d2d03ec5c4b26359b9582fd764e2f30aa2eea68ad5826080fa3d3cc6baf74
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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] f0065d8087773f7932c57d614c9fe9ed4c7b6d66d9de4081982391feaff2e931
[INFO] running `Command { std: "docker" "start" "-a" "f0065d8087773f7932c57d614c9fe9ed4c7b6d66d9de4081982391feaff2e931", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/nth_cons_list-fe97c41b5f2252da)
[INFO] [stdout] 
[INFO] [stdout] running 11 tests
[INFO] [stdout] test tests::test_cmp ... ok
[INFO] [stdout] test tests::test_cons ... ok
[INFO] [stdout] test tests::test_default ... ok
[INFO] [stdout] test tests::test_eq ... ok
[INFO] [stdout] test tests::test_fmt ... ok
[INFO] [stdout] test tests::test_nil ... ok
[INFO] [stdout] test tests::test_partial_cmp ... ok
[INFO] [stdout] test tests::test_reverse ... ok
[INFO] [stdout] test tests::test_to_from_iterator ... ok
[INFO] [stdout] test tests::test_nil_panic_head - should panic ... ok
[INFO] [stdout] test tests::test_nil_panic_tail - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests nth-cons-list
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - List (line 27) ... ok
[INFO] [stdout] test src/lib.rs - List (line 18) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.62s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f0065d8087773f7932c57d614c9fe9ed4c7b6d66d9de4081982391feaff2e931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f0065d8087773f7932c57d614c9fe9ed4c7b6d66d9de4081982391feaff2e931", kill_on_drop: false }`
[INFO] [stdout] f0065d8087773f7932c57d614c9fe9ed4c7b6d66d9de4081982391feaff2e931