[INFO] fetching crate ser-io 0.4.0...
[INFO] building ser-io-0.4.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate ser-io 0.4.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate ser-io 0.4.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate ser-io 0.4.0
[INFO] tweaked toml for crates.io crate ser-io 0.4.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate ser-io 0.4.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ser-io 0.4.0 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 146bd8cbe2541c0e9f10552e6c6c7e184b2ae268c5670948f06a87df5feb2651
[INFO] running `Command { std: "docker" "start" "-a" "146bd8cbe2541c0e9f10552e6c6c7e184b2ae268c5670948f06a87df5feb2651", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "146bd8cbe2541c0e9f10552e6c6c7e184b2ae268c5670948f06a87df5feb2651", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "146bd8cbe2541c0e9f10552e6c6c7e184b2ae268c5670948f06a87df5feb2651", kill_on_drop: false }`
[INFO] [stdout] 146bd8cbe2541c0e9f10552e6c6c7e184b2ae268c5670948f06a87df5feb2651
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2cb38b4d2bac86dcaae55e72ad91ce83ca307d0ae24da48c462bc20594d18e42
[INFO] running `Command { std: "docker" "start" "-a" "2cb38b4d2bac86dcaae55e72ad91ce83ca307d0ae24da48c462bc20594d18e42", kill_on_drop: false }`
[INFO] [stderr]    Compiling ser-io v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "2cb38b4d2bac86dcaae55e72ad91ce83ca307d0ae24da48c462bc20594d18e42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cb38b4d2bac86dcaae55e72ad91ce83ca307d0ae24da48c462bc20594d18e42", kill_on_drop: false }`
[INFO] [stdout] 2cb38b4d2bac86dcaae55e72ad91ce83ca307d0ae24da48c462bc20594d18e42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 98302e59655ece8061d61f44df43426327f9ee33e424042954ab9ff53a14ab8e
[INFO] running `Command { std: "docker" "start" "-a" "98302e59655ece8061d61f44df43426327f9ee33e424042954ab9ff53a14ab8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling structopt v0.3.26
[INFO] [stderr]    Compiling ser-io v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.59s
[INFO] running `Command { std: "docker" "inspect" "98302e59655ece8061d61f44df43426327f9ee33e424042954ab9ff53a14ab8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98302e59655ece8061d61f44df43426327f9ee33e424042954ab9ff53a14ab8e", kill_on_drop: false }`
[INFO] [stdout] 98302e59655ece8061d61f44df43426327f9ee33e424042954ab9ff53a14ab8e