[INFO] fetching crate rson 0.1.0...
[INFO] checking rson-0.1.0 against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] extracting crate rson 0.1.0 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate rson 0.1.0 on toolchain 39e1293fce4b650061e85dda88aa428f726a8444
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rson 0.1.0
[INFO] finished tweaking crates.io crate rson 0.1.0
[INFO] tweaked toml for crates.io crate rson 0.1.0 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+39e1293fce4b650061e85dda88aa428f726a8444" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c3cfdee6ecba61b03a675d9969b5945dbd799527f3ef90fa0a1fd9e647a2f64
[INFO] running `Command { std: "docker" "start" "-a" "4c3cfdee6ecba61b03a675d9969b5945dbd799527f3ef90fa0a1fd9e647a2f64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c3cfdee6ecba61b03a675d9969b5945dbd799527f3ef90fa0a1fd9e647a2f64", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c3cfdee6ecba61b03a675d9969b5945dbd799527f3ef90fa0a1fd9e647a2f64", kill_on_drop: false }`
[INFO] [stdout] 4c3cfdee6ecba61b03a675d9969b5945dbd799527f3ef90fa0a1fd9e647a2f64
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+39e1293fce4b650061e85dda88aa428f726a8444" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 145e867e38983006d8c88dced1f32d8fec910c1f770ccc04eb650635276c914c
[INFO] running `Command { std: "docker" "start" "-a" "145e867e38983006d8c88dced1f32d8fec910c1f770ccc04eb650635276c914c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rson v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.62s
[INFO] running `Command { std: "docker" "inspect" "145e867e38983006d8c88dced1f32d8fec910c1f770ccc04eb650635276c914c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "145e867e38983006d8c88dced1f32d8fec910c1f770ccc04eb650635276c914c", kill_on_drop: false }`
[INFO] [stdout] 145e867e38983006d8c88dced1f32d8fec910c1f770ccc04eb650635276c914c