[INFO] cloning repository https://github.com/thekuom/serde_json_tracing_bunyan_formatter_bug_report
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/thekuom/serde_json_tracing_bunyan_formatter_bug_report" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthekuom%2Fserde_json_tracing_bunyan_formatter_bug_report", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthekuom%2Fserde_json_tracing_bunyan_formatter_bug_report'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 640868f4e8b1a4627f557864a26bd5e29e146532
[INFO] checking thekuom/serde_json_tracing_bunyan_formatter_bug_report against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fthekuom%2Fserde_json_tracing_bunyan_formatter_bug_report" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/thekuom/serde_json_tracing_bunyan_formatter_bug_report on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/thekuom/serde_json_tracing_bunyan_formatter_bug_report
[INFO] finished tweaking git repo https://github.com/thekuom/serde_json_tracing_bunyan_formatter_bug_report
[INFO] tweaked toml for git repo https://github.com/thekuom/serde_json_tracing_bunyan_formatter_bug_report written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/thekuom/serde_json_tracing_bunyan_formatter_bug_report already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.71
[INFO] [stderr]   Downloaded tracing-bunyan-formatter v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac86fada2fcce40a18eb2ea5e25c17ae4d1ca47671f3b92326878e85645da744
[INFO] running `Command { std: "docker" "start" "-a" "ac86fada2fcce40a18eb2ea5e25c17ae4d1ca47671f3b92326878e85645da744", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac86fada2fcce40a18eb2ea5e25c17ae4d1ca47671f3b92326878e85645da744", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac86fada2fcce40a18eb2ea5e25c17ae4d1ca47671f3b92326878e85645da744", kill_on_drop: false }`
[INFO] [stdout] ac86fada2fcce40a18eb2ea5e25c17ae4d1ca47671f3b92326878e85645da744
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c7fba3339c0f868ba7b162212d7987476d959f54fc708ae6b7a35c1972e39be
[INFO] running `Command { std: "docker" "start" "-a" "5c7fba3339c0f868ba7b162212d7987476d959f54fc708ae6b7a35c1972e39be", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling syn v1.0.71
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde v1.0.125
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking tracing-log v0.1.2
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]     Checking tracing-subscriber v0.2.18
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking gethostname v0.2.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking tracing-bunyan-formatter v0.2.1
[INFO] [stderr]     Checking serde-error-minimal v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.77s
[INFO] running `Command { std: "docker" "inspect" "5c7fba3339c0f868ba7b162212d7987476d959f54fc708ae6b7a35c1972e39be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c7fba3339c0f868ba7b162212d7987476d959f54fc708ae6b7a35c1972e39be", kill_on_drop: false }`
[INFO] [stdout] 5c7fba3339c0f868ba7b162212d7987476d959f54fc708ae6b7a35c1972e39be