[INFO] fetching crate rson-core 1.0.0...
[INFO] building rson-core-1.0.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate rson-core 1.0.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate rson-core 1.0.0
[INFO] finished tweaking crates.io crate rson-core 1.0.0
[INFO] tweaked toml for crates.io crate rson-core 1.0.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rson-core 1.0.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rson-core 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f3f8eda1dfee0818e1c41a46586dd9ffad2464104de8d0176d770813b596fb89
[INFO] running `Command { std: "docker" "start" "-a" "f3f8eda1dfee0818e1c41a46586dd9ffad2464104de8d0176d770813b596fb89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3f8eda1dfee0818e1c41a46586dd9ffad2464104de8d0176d770813b596fb89", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3f8eda1dfee0818e1c41a46586dd9ffad2464104de8d0176d770813b596fb89", kill_on_drop: false }`
[INFO] [stdout] f3f8eda1dfee0818e1c41a46586dd9ffad2464104de8d0176d770813b596fb89
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d8ca2e1a9882942e0de6e6affeeaa0d054d07c9958fbc774e8aa7ea5cd2d3f84
[INFO] running `Command { std: "docker" "start" "-a" "d8ca2e1a9882942e0de6e6affeeaa0d054d07c9958fbc774e8aa7ea5cd2d3f84", kill_on_drop: false }`
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling rson-core v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.19s
[INFO] running `Command { std: "docker" "inspect" "d8ca2e1a9882942e0de6e6affeeaa0d054d07c9958fbc774e8aa7ea5cd2d3f84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d8ca2e1a9882942e0de6e6affeeaa0d054d07c9958fbc774e8aa7ea5cd2d3f84", kill_on_drop: false }`
[INFO] [stdout] d8ca2e1a9882942e0de6e6affeeaa0d054d07c9958fbc774e8aa7ea5cd2d3f84
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a4d32965f0ededf84cf9bebcd8ee9aa650283389f54a2bc5de8b300544d0ad7
[INFO] running `Command { std: "docker" "start" "-a" "1a4d32965f0ededf84cf9bebcd8ee9aa650283389f54a2bc5de8b300544d0ad7", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.101
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling serde_json v1.0.140
[INFO] [stderr]    Compiling rson-core v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 13.92s
[INFO] running `Command { std: "docker" "inspect" "1a4d32965f0ededf84cf9bebcd8ee9aa650283389f54a2bc5de8b300544d0ad7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a4d32965f0ededf84cf9bebcd8ee9aa650283389f54a2bc5de8b300544d0ad7", kill_on_drop: false }`
[INFO] [stdout] 1a4d32965f0ededf84cf9bebcd8ee9aa650283389f54a2bc5de8b300544d0ad7