[INFO] fetching crate object-chain 0.1.3...
[INFO] testing object-chain-0.1.3 against 1.55.0 for beta-1.56-1
[INFO] extracting crate object-chain 0.1.3 into /workspace/builds/worker-46/source
[INFO] validating manifest of crates.io crate object-chain 0.1.3 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 object-chain 0.1.3
[INFO] finished tweaking crates.io crate object-chain 0.1.3
[INFO] tweaked toml for crates.io crate object-chain 0.1.3 written to /workspace/builds/worker-46/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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] 1600331d842f51f109286067e38c2fa5f4c71257ee38dc6689f08a29d0844652
[INFO] running `Command { std: "docker" "start" "-a" "1600331d842f51f109286067e38c2fa5f4c71257ee38dc6689f08a29d0844652", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1600331d842f51f109286067e38c2fa5f4c71257ee38dc6689f08a29d0844652", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1600331d842f51f109286067e38c2fa5f4c71257ee38dc6689f08a29d0844652", kill_on_drop: false }`
[INFO] [stdout] 1600331d842f51f109286067e38c2fa5f4c71257ee38dc6689f08a29d0844652
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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] 695f1c76446486bd342f8ce5406e764c84bebbb2cb96efb6c768fe4c19da1c5d
[INFO] running `Command { std: "docker" "start" "-a" "695f1c76446486bd342f8ce5406e764c84bebbb2cb96efb6c768fe4c19da1c5d", kill_on_drop: false }`
[INFO] [stderr]    Compiling object-chain v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "695f1c76446486bd342f8ce5406e764c84bebbb2cb96efb6c768fe4c19da1c5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "695f1c76446486bd342f8ce5406e764c84bebbb2cb96efb6c768fe4c19da1c5d", kill_on_drop: false }`
[INFO] [stdout] 695f1c76446486bd342f8ce5406e764c84bebbb2cb96efb6c768fe4c19da1c5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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] aedfaf178f4df605f7f97c2e6523c90dc24ac412131f4851f94730960fba0e1e
[INFO] running `Command { std: "docker" "start" "-a" "aedfaf178f4df605f7f97c2e6523c90dc24ac412131f4851f94730960fba0e1e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling object-chain v0.1.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "aedfaf178f4df605f7f97c2e6523c90dc24ac412131f4851f94730960fba0e1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aedfaf178f4df605f7f97c2e6523c90dc24ac412131f4851f94730960fba0e1e", kill_on_drop: false }`
[INFO] [stdout] aedfaf178f4df605f7f97c2e6523c90dc24ac412131f4851f94730960fba0e1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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] 8f42fec32b8ec35dbb51d2329c07d5137a2b10ad6b8c6388f7b4a8e2b6779d87
[INFO] running `Command { std: "docker" "start" "-a" "8f42fec32b8ec35dbb51d2329c07d5137a2b10ad6b8c6388f7b4a8e2b6779d87", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.66s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/object_chain-a7de89218b578544)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests object-chain
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test::test ... ok
[INFO] [stdout] test test::test_count ... ok
[INFO] [stdout] test test::test_accessing_elements_with_common_interface ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - chain (line 168) ... ok
[INFO] [stdout] test src/lib.rs - chain (line 158) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.36s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8f42fec32b8ec35dbb51d2329c07d5137a2b10ad6b8c6388f7b4a8e2b6779d87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f42fec32b8ec35dbb51d2329c07d5137a2b10ad6b8c6388f7b4a8e2b6779d87", kill_on_drop: false }`
[INFO] [stdout] 8f42fec32b8ec35dbb51d2329c07d5137a2b10ad6b8c6388f7b4a8e2b6779d87