[INFO] fetching crate flat-json 0.1.0...
[INFO] testing flat-json-0.1.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate flat-json 0.1.0 into /workspace/builds/worker-76/source
[INFO] validating manifest of crates.io crate flat-json 0.1.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flat-json 0.1.0
[INFO] finished tweaking crates.io crate flat-json 0.1.0
[INFO] tweaked toml for crates.io crate flat-json 0.1.0 written to /workspace/builds/worker-76/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b1c39cd64861fb7b0ec3e8a420f14f24baace9c0257b9feead2fce4bc9e7f0d7
[INFO] running `Command { std: "docker" "start" "-a" "b1c39cd64861fb7b0ec3e8a420f14f24baace9c0257b9feead2fce4bc9e7f0d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1c39cd64861fb7b0ec3e8a420f14f24baace9c0257b9feead2fce4bc9e7f0d7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1c39cd64861fb7b0ec3e8a420f14f24baace9c0257b9feead2fce4bc9e7f0d7", kill_on_drop: false }`
[INFO] [stdout] b1c39cd64861fb7b0ec3e8a420f14f24baace9c0257b9feead2fce4bc9e7f0d7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e845c83748f526413de5049b42f1dc7cdf4569eceb031713081f14950773c17
[INFO] running `Command { std: "docker" "start" "-a" "5e845c83748f526413de5049b42f1dc7cdf4569eceb031713081f14950773c17", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling itoa v0.1.1
[INFO] [stderr]    Compiling serde v0.8.23
[INFO] [stderr]    Compiling dtoa v0.2.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling serde_json v0.8.6
[INFO] [stderr]    Compiling flat-json v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.44s
[INFO] running `Command { std: "docker" "inspect" "5e845c83748f526413de5049b42f1dc7cdf4569eceb031713081f14950773c17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e845c83748f526413de5049b42f1dc7cdf4569eceb031713081f14950773c17", kill_on_drop: false }`
[INFO] [stdout] 5e845c83748f526413de5049b42f1dc7cdf4569eceb031713081f14950773c17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76763f0a75a1703ca5944fdf0135e81d32074c9f21c4285aeba63bdb864736e6
[INFO] running `Command { std: "docker" "start" "-a" "76763f0a75a1703ca5944fdf0135e81d32074c9f21c4285aeba63bdb864736e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling flat-json v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.99s
[INFO] running `Command { std: "docker" "inspect" "76763f0a75a1703ca5944fdf0135e81d32074c9f21c4285aeba63bdb864736e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76763f0a75a1703ca5944fdf0135e81d32074c9f21c4285aeba63bdb864736e6", kill_on_drop: false }`
[INFO] [stdout] 76763f0a75a1703ca5944fdf0135e81d32074c9f21c4285aeba63bdb864736e6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-76/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 96f5c9c8785495267e22c515d4d9938ced577e4f473b7027ce4ce3ae48afd6b7
[INFO] running `Command { std: "docker" "start" "-a" "96f5c9c8785495267e22c515d4d9938ced577e4f473b7027ce4ce3ae48afd6b7", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/flat_json-1ebeaed931b617cc)
[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" "96f5c9c8785495267e22c515d4d9938ced577e4f473b7027ce4ce3ae48afd6b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96f5c9c8785495267e22c515d4d9938ced577e4f473b7027ce4ce3ae48afd6b7", kill_on_drop: false }`
[INFO] [stdout] 96f5c9c8785495267e22c515d4d9938ced577e4f473b7027ce4ce3ae48afd6b7