[INFO] cloning repository https://github.com/michaelmior/eson
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michaelmior/eson" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelmior%2Feson", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelmior%2Feson'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b2332afe6921ba53be4c4fecf934e8eeead25b26
[INFO] checking michaelmior/eson against try#05c8870159e4f328578a970e125aa76d24f03b56 for pr-76219
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelmior%2Feson" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/michaelmior/eson on toolchain 05c8870159e4f328578a970e125aa76d24f03b56
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/michaelmior/eson
[INFO] finished tweaking git repo https://github.com/michaelmior/eson
[INFO] tweaked toml for git repo https://github.com/michaelmior/eson written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/michaelmior/eson already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded indexmap v1.5.1
[INFO] [stderr]   Downloaded peg-macros v0.6.3
[INFO] [stderr]   Downloaded peg-runtime v0.6.3
[INFO] [stderr]   Downloaded argparse v0.2.1
[INFO] [stderr]   Downloaded hashbrown v0.8.2
[INFO] [stderr]   Downloaded peg v0.6.3
[INFO] [stderr]   Downloaded itertools v0.6.1
[INFO] [stderr]   Downloaded defaultmap v0.4.0
[INFO] [stderr]   Downloaded float-ord v0.1.2
[INFO] [stderr]   Downloaded permutation v0.2.5
[INFO] [stderr]   Downloaded string-intern v0.1.7
[INFO] [stderr]   Downloaded collect-mac v0.1.0
[INFO] [stderr]   Downloaded group-by v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 87521c2074818f155101788c6ad0221779526489afe06f424a6db1475a5db32d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "87521c2074818f155101788c6ad0221779526489afe06f424a6db1475a5db32d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87521c2074818f155101788c6ad0221779526489afe06f424a6db1475a5db32d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87521c2074818f155101788c6ad0221779526489afe06f424a6db1475a5db32d", kill_on_drop: false }`
[INFO] [stdout] 87521c2074818f155101788c6ad0221779526489afe06f424a6db1475a5db32d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+05c8870159e4f328578a970e125aa76d24f03b56" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c6f8c0456c438f69a328dff74d3b4b01aa8b357b96d9d850852a1171e7d93256
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c6f8c0456c438f69a328dff74d3b4b01aa8b357b96d9d850852a1171e7d93256", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling peg-runtime v0.6.3
[INFO] [stderr]     Checking either v1.1.0
[INFO] [stderr]     Checking permutation v0.2.5
[INFO] [stderr]     Checking group-by v1.0.0
[INFO] [stderr]     Checking argparse v0.2.1
[INFO] [stderr]     Checking float-ord v0.1.2
[INFO] [stderr]     Checking defaultmap v0.4.0
[INFO] [stderr]     Checking collect-mac v0.1.0
[INFO] [stderr]     Checking string-intern v0.1.7
[INFO] [stderr]     Checking itertools v0.6.1
[INFO] [stderr]    Compiling peg-macros v0.6.3
[INFO] [stderr]     Checking peg v0.6.3
[INFO] [stderr]     Checking eson v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.14s
[INFO] running `Command { std: "docker" "inspect" "c6f8c0456c438f69a328dff74d3b4b01aa8b357b96d9d850852a1171e7d93256", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6f8c0456c438f69a328dff74d3b4b01aa8b357b96d9d850852a1171e7d93256", kill_on_drop: false }`
[INFO] [stdout] c6f8c0456c438f69a328dff74d3b4b01aa8b357b96d9d850852a1171e7d93256