[INFO] fetching crate er 0.2.1...
[INFO] testing er-0.2.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate er 0.2.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate er 0.2.1 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 er 0.2.1
[INFO] finished tweaking crates.io crate er 0.2.1
[INFO] tweaked toml for crates.io crate er 0.2.1 written to /workspace/builds/worker-6/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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 4d6c7c170b3bc5878b6961dd24e04c905d750ded0ad8a30a4ba59942da3a3dfa
[INFO] running `Command { std: "docker" "start" "-a" "4d6c7c170b3bc5878b6961dd24e04c905d750ded0ad8a30a4ba59942da3a3dfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4d6c7c170b3bc5878b6961dd24e04c905d750ded0ad8a30a4ba59942da3a3dfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d6c7c170b3bc5878b6961dd24e04c905d750ded0ad8a30a4ba59942da3a3dfa", kill_on_drop: false }`
[INFO] [stdout] 4d6c7c170b3bc5878b6961dd24e04c905d750ded0ad8a30a4ba59942da3a3dfa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] d291fbd518dde2310e45ec543b349ea555560573b0cc0bb5fab062373b0b2cc0
[INFO] running `Command { std: "docker" "start" "-a" "d291fbd518dde2310e45ec543b349ea555560573b0cc0bb5fab062373b0b2cc0", kill_on_drop: false }`
[INFO] [stderr]    Compiling er v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "d291fbd518dde2310e45ec543b349ea555560573b0cc0bb5fab062373b0b2cc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d291fbd518dde2310e45ec543b349ea555560573b0cc0bb5fab062373b0b2cc0", kill_on_drop: false }`
[INFO] [stdout] d291fbd518dde2310e45ec543b349ea555560573b0cc0bb5fab062373b0b2cc0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 4ce700b95c99d5ecc59df73d5ec041a4eda9602fbd661cbdb245c41cdd47f1ba
[INFO] running `Command { std: "docker" "start" "-a" "4ce700b95c99d5ecc59df73d5ec041a4eda9602fbd661cbdb245c41cdd47f1ba", kill_on_drop: false }`
[INFO] [stderr]    Compiling er v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `Command { std: "docker" "inspect" "4ce700b95c99d5ecc59df73d5ec041a4eda9602fbd661cbdb245c41cdd47f1ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ce700b95c99d5ecc59df73d5ec041a4eda9602fbd661cbdb245c41cdd47f1ba", kill_on_drop: false }`
[INFO] [stdout] 4ce700b95c99d5ecc59df73d5ec041a4eda9602fbd661cbdb245c41cdd47f1ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 349c780fe93f29ef70ffac45f8b1fc652e926a071cb0317d83a90fe2b2ed1c17
[INFO] running `Command { std: "docker" "start" "-a" "349c780fe93f29ef70ffac45f8b1fc652e926a071cb0317d83a90fe2b2ed1c17", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/error-94401002a377ddef)
[INFO] [stderr]    Doc-tests error
[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] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - Error::source (line 30) ... ok
[INFO] [stdout] test src/lib.rs - Error::description (line 80) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.42s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "349c780fe93f29ef70ffac45f8b1fc652e926a071cb0317d83a90fe2b2ed1c17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "349c780fe93f29ef70ffac45f8b1fc652e926a071cb0317d83a90fe2b2ed1c17", kill_on_drop: false }`
[INFO] [stdout] 349c780fe93f29ef70ffac45f8b1fc652e926a071cb0317d83a90fe2b2ed1c17