[INFO] fetching crate json-ext 0.3.0...
[INFO] testing json-ext-0.3.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate json-ext 0.3.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate json-ext 0.3.0 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-ext 0.3.0
[INFO] finished tweaking crates.io crate json-ext 0.3.0
[INFO] tweaked toml for crates.io crate json-ext 0.3.0 written to /workspace/builds/worker-14/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 53d8b0f8f54c2f94f7ba2b9459da3cf24a16463eecbd10980fefc9cbbd6ea25c
[INFO] running `Command { std: "docker" "start" "-a" "53d8b0f8f54c2f94f7ba2b9459da3cf24a16463eecbd10980fefc9cbbd6ea25c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53d8b0f8f54c2f94f7ba2b9459da3cf24a16463eecbd10980fefc9cbbd6ea25c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53d8b0f8f54c2f94f7ba2b9459da3cf24a16463eecbd10980fefc9cbbd6ea25c", kill_on_drop: false }`
[INFO] [stdout] 53d8b0f8f54c2f94f7ba2b9459da3cf24a16463eecbd10980fefc9cbbd6ea25c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 0db9e67de3dc7bc140f795c212fe507ede12ddf7a2c80914c811c18918248218
[INFO] running `Command { std: "docker" "start" "-a" "0db9e67de3dc7bc140f795c212fe507ede12ddf7a2c80914c811c18918248218", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling json-ext v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.43s
[INFO] running `Command { std: "docker" "inspect" "0db9e67de3dc7bc140f795c212fe507ede12ddf7a2c80914c811c18918248218", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0db9e67de3dc7bc140f795c212fe507ede12ddf7a2c80914c811c18918248218", kill_on_drop: false }`
[INFO] [stdout] 0db9e67de3dc7bc140f795c212fe507ede12ddf7a2c80914c811c18918248218
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 37f5f549ac777eaa4a5ccd49406db0c50e754539de7188b3122e8243f0d498c1
[INFO] running `Command { std: "docker" "start" "-a" "37f5f549ac777eaa4a5ccd49406db0c50e754539de7188b3122e8243f0d498c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling json-ext v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "37f5f549ac777eaa4a5ccd49406db0c50e754539de7188b3122e8243f0d498c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37f5f549ac777eaa4a5ccd49406db0c50e754539de7188b3122e8243f0d498c1", kill_on_drop: false }`
[INFO] [stdout] 37f5f549ac777eaa4a5ccd49406db0c50e754539de7188b3122e8243f0d498c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] a96bac771d7f834cd38cb4fe8fdfca36d94f0a29675407ee93c949b1dd5c85e5
[INFO] running `Command { std: "docker" "start" "-a" "a96bac771d7f834cd38cb4fe8fdfca36d94f0a29675407ee93c949b1dd5c85e5", 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_ext-e3af043d50b4c837)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test object::test::try_from_and_try_into ... ok
[INFO] [stdout] test object::test::json ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests json-ext
[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" "a96bac771d7f834cd38cb4fe8fdfca36d94f0a29675407ee93c949b1dd5c85e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a96bac771d7f834cd38cb4fe8fdfca36d94f0a29675407ee93c949b1dd5c85e5", kill_on_drop: false }`
[INFO] [stdout] a96bac771d7f834cd38cb4fe8fdfca36d94f0a29675407ee93c949b1dd5c85e5