[INFO] fetching crate transitive_frontier 0.1.1...
[INFO] checking transitive_frontier-0.1.1 against try#39e1293fce4b650061e85dda88aa428f726a8444 for pr-88041
[INFO] extracting crate transitive_frontier 0.1.1 into /workspace/builds/worker-53/source
[INFO] validating manifest of crates.io crate transitive_frontier 0.1.1 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 transitive_frontier 0.1.1
[INFO] finished tweaking crates.io crate transitive_frontier 0.1.1
[INFO] tweaked toml for crates.io crate transitive_frontier 0.1.1 written to /workspace/builds/worker-53/source/Cargo.toml
[INFO] crate crates.io crate transitive_frontier 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+39e1293fce4b650061e85dda88aa428f726a8444" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.8
[INFO] [stderr]   Downloaded strsim v0.8.0
[INFO] [stderr]   Downloaded textwrap v0.11.0
[INFO] [stderr]   Downloaded unicode-segmentation v1.7.1
[INFO] [stderr]   Downloaded hermit-abi v0.1.17
[INFO] [stderr]   Downloaded libc v0.2.81
[INFO] [stderr]   Downloaded sha-1 v0.8.2
[INFO] [stderr]   Downloaded block-padding v0.1.5
[INFO] [stderr]   Downloaded nested v0.1.1
[INFO] [stderr]   Downloaded once_cell v1.5.2
[INFO] [stderr]   Downloaded ucd-trie v0.1.3
[INFO] [stderr]   Downloaded itertools v0.9.0
[INFO] [stderr]   Downloaded maplit v1.0.2
[INFO] [stderr]   Downloaded horrorshow v0.7.0
[INFO] [stderr]   Downloaded heck v0.3.2
[INFO] [stderr]   Downloaded version_check v0.9.2
[INFO] [stderr]   Downloaded fixedbitset v0.2.0
[INFO] [stderr]   Downloaded semver v0.11.0
[INFO] [stderr]   Downloaded cargo_metadata v0.12.1
[INFO] [stderr]   Downloaded byteorder v1.3.4
[INFO] [stderr]   Downloaded generic-array v0.12.3
[INFO] [stderr]   Downloaded supercow v0.1.0
[INFO] [stderr]   Downloaded smallvec v1.6.0
[INFO] [stderr]   Downloaded toml v0.5.8
[INFO] [stderr]   Downloaded semver-parser v0.10.0
[INFO] [stderr]   Downloaded clap v2.33.3
[INFO] [stderr]   Downloaded structopt v0.3.21
[INFO] [stderr]   Downloaded structopt-derive v0.4.14
[INFO] [stderr]   Downloaded digest v0.8.1
[INFO] [stderr]   Downloaded pest_generator v2.1.3
[INFO] [stderr]   Downloaded serde_derive v1.0.118
[INFO] [stderr]   Downloaded serde v1.0.118
[INFO] [stderr]   Downloaded syn v1.0.57
[INFO] [stderr]   Downloaded opaque-debug v0.2.3
[INFO] [stderr]   Downloaded pest_meta v2.1.3
[INFO] [stderr]   Downloaded petgraph v0.5.1
[INFO] [stderr]   Downloaded pest v2.1.3
[INFO] [stderr]   Downloaded ansi_term v0.11.0
[INFO] [stderr]   Downloaded pathdiff v0.2.0
[INFO] [stderr]   Downloaded indexmap v1.6.1
[INFO] [stderr]   Downloaded typenum v1.12.0
[INFO] [stderr]   Downloaded byte-tools v0.3.1
[INFO] [stderr]   Downloaded block-buffer v0.7.3
[INFO] [stderr]   Downloaded fake-simd v0.1.2
[INFO] [stderr]   Downloaded serde_json v1.0.61
[INFO] [stderr]   Downloaded pest_derive v2.1.0
[INFO] [stderr]   Downloaded target-spec v0.5.0
[INFO] [stderr]   Downloaded cfg-expr v0.5.1
[INFO] [stderr]   Downloaded guppy v0.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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] d2f28d2fb94eb6bae102c0084e13bc766836e908bdd99c6e911743799fd6cecd
[INFO] running `Command { std: "docker" "start" "-a" "d2f28d2fb94eb6bae102c0084e13bc766836e908bdd99c6e911743799fd6cecd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d2f28d2fb94eb6bae102c0084e13bc766836e908bdd99c6e911743799fd6cecd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2f28d2fb94eb6bae102c0084e13bc766836e908bdd99c6e911743799fd6cecd", kill_on_drop: false }`
[INFO] [stdout] d2f28d2fb94eb6bae102c0084e13bc766836e908bdd99c6e911743799fd6cecd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-53/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] 086c6b6cc0c31903885261962404d04b37b8c2430b629a1751fd20aa11f64dac
[INFO] running `Command { std: "docker" "start" "-a" "086c6b6cc0c31903885261962404d04b37b8c2430b629a1751fd20aa11f64dac", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]     Checking smallvec v1.6.0
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling target-spec v0.5.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking supercow v0.1.0
[INFO] [stderr]     Checking nested v0.1.1
[INFO] [stderr]     Checking pathdiff v0.2.0
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking horrorshow v0.7.0
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]     Checking cfg-expr v0.5.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking semver-parser v0.10.0
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking semver v0.11.0
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking cargo_metadata v0.12.1
[INFO] [stderr]     Checking guppy v0.6.2
[INFO] [stderr]     Checking transitive_frontier v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.12s
[INFO] running `Command { std: "docker" "inspect" "086c6b6cc0c31903885261962404d04b37b8c2430b629a1751fd20aa11f64dac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "086c6b6cc0c31903885261962404d04b37b8c2430b629a1751fd20aa11f64dac", kill_on_drop: false }`
[INFO] [stdout] 086c6b6cc0c31903885261962404d04b37b8c2430b629a1751fd20aa11f64dac