[INFO] fetching crate json-decode 0.6.0...
[INFO] testing json-decode-0.6.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate json-decode 0.6.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate json-decode 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 json-decode 0.6.0
[INFO] finished tweaking crates.io crate json-decode 0.6.0
[INFO] tweaked toml for crates.io crate json-decode 0.6.0 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] [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-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] 8f7ed4597b09e0d587979ba88841f4d8d8e1ec6ed36c891ef40e1292ccb391ba
[INFO] running `Command { std: "docker" "start" "-a" "8f7ed4597b09e0d587979ba88841f4d8d8e1ec6ed36c891ef40e1292ccb391ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f7ed4597b09e0d587979ba88841f4d8d8e1ec6ed36c891ef40e1292ccb391ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f7ed4597b09e0d587979ba88841f4d8d8e1ec6ed36c891ef40e1292ccb391ba", kill_on_drop: false }`
[INFO] [stdout] 8f7ed4597b09e0d587979ba88841f4d8d8e1ec6ed36c891ef40e1292ccb391ba
[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] adaf8dcfc9906cf77fa3f4ee82bcccb5a46084046bef2b9224401911dd34431e
[INFO] running `Command { std: "docker" "start" "-a" "adaf8dcfc9906cf77fa3f4ee82bcccb5a46084046bef2b9224401911dd34431e", kill_on_drop: false }`
[INFO] [stderr]    Compiling json-decode v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.54s
[INFO] running `Command { std: "docker" "inspect" "adaf8dcfc9906cf77fa3f4ee82bcccb5a46084046bef2b9224401911dd34431e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adaf8dcfc9906cf77fa3f4ee82bcccb5a46084046bef2b9224401911dd34431e", kill_on_drop: false }`
[INFO] [stdout] adaf8dcfc9906cf77fa3f4ee82bcccb5a46084046bef2b9224401911dd34431e
[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] c359c2d2bd041f2d11aec3df629d78dd4c9fd40ce63c47100cd1d02fe8f95047
[INFO] running `Command { std: "docker" "start" "-a" "c359c2d2bd041f2d11aec3df629d78dd4c9fd40ce63c47100cd1d02fe8f95047", kill_on_drop: false }`
[INFO] [stderr]    Compiling json-decode v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.88s
[INFO] running `Command { std: "docker" "inspect" "c359c2d2bd041f2d11aec3df629d78dd4c9fd40ce63c47100cd1d02fe8f95047", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c359c2d2bd041f2d11aec3df629d78dd4c9fd40ce63c47100cd1d02fe8f95047", kill_on_drop: false }`
[INFO] [stdout] c359c2d2bd041f2d11aec3df629d78dd4c9fd40ce63c47100cd1d02fe8f95047
[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] 43e24ff7778a4ba7eb1c6049aff7fc6a62d2f97b83b812a14b5158b8209646af
[INFO] running `Command { std: "docker" "start" "-a" "43e24ff7778a4ba7eb1c6049aff7fc6a62d2f97b83b812a14b5158b8209646af", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/json_decode-cd61d38928fc048e)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::decode_a_struct ... ok
[INFO] [stdout] test tests::decode_using_serde ... ok
[INFO] [stdout] test tests::decoding_a_list ... ok
[INFO] [stdout] test tests::decoding_integers ... ok
[INFO] [stdout] test tests::decoding_opt_vec_opt ... ok
[INFO] [stdout] test tests::one_of_the_macro_map_fns ... ok
[INFO] [stdout] test tests::test_and_then ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests json-decode
[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" "43e24ff7778a4ba7eb1c6049aff7fc6a62d2f97b83b812a14b5158b8209646af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43e24ff7778a4ba7eb1c6049aff7fc6a62d2f97b83b812a14b5158b8209646af", kill_on_drop: false }`
[INFO] [stdout] 43e24ff7778a4ba7eb1c6049aff7fc6a62d2f97b83b812a14b5158b8209646af