[INFO] fetching crate libarc 0.1.0...
[INFO] checking libarc-0.1.0 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate libarc 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate libarc 0.1.0 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate libarc 0.1.0
[INFO] finished tweaking crates.io crate libarc 0.1.0
[INFO] tweaked toml for crates.io crate libarc 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3a60b3dfb5d1bc6af830393502423b69ead0042dd6e420833f8f7843702d776a
[INFO] running `Command { std: "docker" "start" "-a" "3a60b3dfb5d1bc6af830393502423b69ead0042dd6e420833f8f7843702d776a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3a60b3dfb5d1bc6af830393502423b69ead0042dd6e420833f8f7843702d776a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a60b3dfb5d1bc6af830393502423b69ead0042dd6e420833f8f7843702d776a", kill_on_drop: false }`
[INFO] [stdout] 3a60b3dfb5d1bc6af830393502423b69ead0042dd6e420833f8f7843702d776a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 61c7b57a981010e41966772e66bd8ce99b0cb8dfb1e7550d4211dce6194248ae
[INFO] running `Command { std: "docker" "start" "-a" "61c7b57a981010e41966772e66bd8ce99b0cb8dfb1e7550d4211dce6194248ae", kill_on_drop: false }`
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking bytes v1.0.1
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling stdweb-internal-runtime v0.1.5
[INFO] [stderr]    Compiling httparse v1.4.1
[INFO] [stderr]    Compiling sha1 v0.6.0
[INFO] [stderr]    Compiling base-x v0.2.8
[INFO] [stderr]     Checking discard v1.0.4
[INFO] [stderr]     Checking tokio-async v0.0.0
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking tracing-core v0.1.18
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking http v0.2.4
[INFO] [stderr]     Checking tracing v0.1.26
[INFO] [stderr]    Compiling stdweb v0.4.20
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]     Checking pin-project v1.0.8
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking h2 v0.2.7
[INFO] [stderr]    Compiling stdweb-derive v0.5.3
[INFO] [stderr]    Compiling stdweb-internal-macros v0.2.9
[INFO] [stderr]     Checking hyper v0.13.10
[INFO] [stderr]     Checking libarc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 41.50s
[INFO] running `Command { std: "docker" "inspect" "61c7b57a981010e41966772e66bd8ce99b0cb8dfb1e7550d4211dce6194248ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61c7b57a981010e41966772e66bd8ce99b0cb8dfb1e7550d4211dce6194248ae", kill_on_drop: false }`
[INFO] [stdout] 61c7b57a981010e41966772e66bd8ce99b0cb8dfb1e7550d4211dce6194248ae