[INFO] fetching crate algorithm-problem-client 0.6.0...
[INFO] checking algorithm-problem-client-0.6.0 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate algorithm-problem-client 0.6.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate algorithm-problem-client 0.6.0 on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate algorithm-problem-client 0.6.0
[INFO] finished tweaking crates.io crate algorithm-problem-client 0.6.0
[INFO] tweaked toml for crates.io crate algorithm-problem-client 0.6.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded sluice v0.4.2
[INFO] [stderr]   Downloaded surf v1.0.3
[INFO] [stderr]   Downloaded isahc v0.7.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] b6d5ddc5e99f9df7d3c7c62d919b31ed9ed08dbbde20c6431d1fc643a84b3d3b
[INFO] running `Command { std: "docker" "start" "-a" "b6d5ddc5e99f9df7d3c7c62d919b31ed9ed08dbbde20c6431d1fc643a84b3d3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6d5ddc5e99f9df7d3c7c62d919b31ed9ed08dbbde20c6431d1fc643a84b3d3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6d5ddc5e99f9df7d3c7c62d919b31ed9ed08dbbde20c6431d1fc643a84b3d3b", kill_on_drop: false }`
[INFO] [stdout] b6d5ddc5e99f9df7d3c7c62d919b31ed9ed08dbbde20c6431d1fc643a84b3d3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a54ce625bf49f98f6a704f394f945f803aea736c70a357c26af03e45951834ae
[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" "a54ce625bf49f98f6a704f394f945f803aea736c70a357c26af03e45951834ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling siphasher v0.3.5
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]    Compiling convert_case v0.4.0
[INFO] [stderr]    Compiling isahc v0.7.6
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking thin-slice v0.1.1
[INFO] [stderr]     Checking ego-tree v0.6.2
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.7
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling openssl-sys v0.9.65
[INFO] [stderr]    Compiling libnghttp2-sys v0.1.6+1.43.0
[INFO] [stderr]    Compiling curl-sys v0.4.45+curl-7.78.0
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking dtoa-short v0.3.3
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]     Checking servo_arc v0.1.1
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking tendril v0.4.2
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]     Checking sluice v0.4.2
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand_pcg v0.2.1
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling phf_generator v0.8.0
[INFO] [stderr]    Compiling phf_codegen v0.8.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.1
[INFO] [stderr]    Compiling selectors v0.22.0
[INFO] [stderr]    Compiling markup5ever v0.10.1
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling phf_macros v0.8.0
[INFO] [stderr]    Compiling cssparser v0.27.2
[INFO] [stderr]    Compiling html5ever v0.25.1
[INFO] [stderr]    Compiling cssparser-macros v0.6.0
[INFO] [stderr]    Compiling derive_more v0.99.16
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking phf v0.8.0
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling curl v0.4.38
[INFO] [stderr]     Checking futures-executor v0.3.16
[INFO] [stderr]     Checking futures v0.3.16
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking string_cache v0.8.1
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking surf v1.0.3
[INFO] [stderr]     Checking scraper v0.12.0
[INFO] [stderr]     Checking algorithm-problem-client v0.6.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 55.39s
[INFO] running `Command { std: "docker" "inspect" "a54ce625bf49f98f6a704f394f945f803aea736c70a357c26af03e45951834ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a54ce625bf49f98f6a704f394f945f803aea736c70a357c26af03e45951834ae", kill_on_drop: false }`
[INFO] [stdout] a54ce625bf49f98f6a704f394f945f803aea736c70a357c26af03e45951834ae