[INFO] fetching crate impedance 0.3.0...
[INFO] checking impedance-0.3.0 against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] extracting crate impedance 0.3.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate impedance 0.3.0 on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate impedance 0.3.0
[INFO] finished tweaking crates.io crate impedance 0.3.0
[INFO] tweaked toml for crates.io crate impedance 0.3.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad9d1314f8d39aab75c275cf16058d89414f76aff4c77237241fd1bebe715d9b
[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" "ad9d1314f8d39aab75c275cf16058d89414f76aff4c77237241fd1bebe715d9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad9d1314f8d39aab75c275cf16058d89414f76aff4c77237241fd1bebe715d9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad9d1314f8d39aab75c275cf16058d89414f76aff4c77237241fd1bebe715d9b", kill_on_drop: false }`
[INFO] [stdout] ad9d1314f8d39aab75c275cf16058d89414f76aff4c77237241fd1bebe715d9b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", 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] db638f4899bc429283ace8b55796af3f34874c283db5b9635290ad8566196a73
[INFO] running `Command { std: "docker" "start" "-a" "db638f4899bc429283ace8b55796af3f34874c283db5b9635290ad8566196a73", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]     Checking futures-io v0.3.16
[INFO] [stderr]     Checking fastrand v1.5.0
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling tokio v1.10.0
[INFO] [stderr]     Checking socket2 v0.4.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking serde_json v1.0.66
[INFO] [stderr]     Checking futures-channel v0.3.16
[INFO] [stderr]     Checking signal-hook v0.3.9
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]     Checking value-bag v1.0.0-alpha.7
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking polling v2.1.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.6.0
[INFO] [stderr]     Checking pin-project v1.0.8
[INFO] [stderr]     Checking async-process v1.2.0
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking impedance v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking futures-executor v0.3.16
[INFO] [stderr]     Checking futures v0.3.16
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 32.31s
[INFO] running `Command { std: "docker" "inspect" "db638f4899bc429283ace8b55796af3f34874c283db5b9635290ad8566196a73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db638f4899bc429283ace8b55796af3f34874c283db5b9635290ad8566196a73", kill_on_drop: false }`
[INFO] [stdout] db638f4899bc429283ace8b55796af3f34874c283db5b9635290ad8566196a73