[INFO] fetching crate optional-field 0.1.2...
[INFO] checking optional-field-0.1.2 against try#07fecb9cf34c4979a772ba38c99d6d9144768413 for pr-87710
[INFO] extracting crate optional-field 0.1.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate optional-field 0.1.2 on toolchain 07fecb9cf34c4979a772ba38c99d6d9144768413
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate optional-field 0.1.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate optional-field 0.1.2
[INFO] tweaked toml for crates.io crate optional-field 0.1.2 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded optional-fields-serde-macro v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 72c3e7bb15fd0bcc0fc35a9c236af97e01097daa78625f913910c71eec2aa811
[INFO] running `Command { std: "docker" "start" "-a" "72c3e7bb15fd0bcc0fc35a9c236af97e01097daa78625f913910c71eec2aa811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72c3e7bb15fd0bcc0fc35a9c236af97e01097daa78625f913910c71eec2aa811", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72c3e7bb15fd0bcc0fc35a9c236af97e01097daa78625f913910c71eec2aa811", kill_on_drop: false }`
[INFO] [stdout] 72c3e7bb15fd0bcc0fc35a9c236af97e01097daa78625f913910c71eec2aa811
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+07fecb9cf34c4979a772ba38c99d6d9144768413" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9edc6cafd8b3484696c8f66ae78d467bad3b25a7ed12195c9b1e399abf2f5c4c
[INFO] running `Command { std: "docker" "start" "-a" "9edc6cafd8b3484696c8f66ae78d467bad3b25a7ed12195c9b1e399abf2f5c4c", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling serde_derive v1.0.129
[INFO] [stderr]    Compiling optional-fields-serde-macro v0.1.0
[INFO] [stderr]     Checking serde v1.0.129
[INFO] [stderr]     Checking optional-field v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.35s
[INFO] running `Command { std: "docker" "inspect" "9edc6cafd8b3484696c8f66ae78d467bad3b25a7ed12195c9b1e399abf2f5c4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9edc6cafd8b3484696c8f66ae78d467bad3b25a7ed12195c9b1e399abf2f5c4c", kill_on_drop: false }`
[INFO] [stdout] 9edc6cafd8b3484696c8f66ae78d467bad3b25a7ed12195c9b1e399abf2f5c4c