[INFO] fetching crate minus 4.0.1...
[INFO] checking minus-4.0.1 against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] extracting crate minus 4.0.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate minus 4.0.1 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 minus 4.0.1
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate minus 4.0.1
[INFO] tweaked toml for crates.io crate minus 4.0.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate minus 4.0.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41721bb3f0decf9c17cd040cf927a5232fa2c9c925638ed42deeb85f3ed23b1f
[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" "41721bb3f0decf9c17cd040cf927a5232fa2c9c925638ed42deeb85f3ed23b1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41721bb3f0decf9c17cd040cf927a5232fa2c9c925638ed42deeb85f3ed23b1f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41721bb3f0decf9c17cd040cf927a5232fa2c9c925638ed42deeb85f3ed23b1f", kill_on_drop: false }`
[INFO] [stdout] 41721bb3f0decf9c17cd040cf927a5232fa2c9c925638ed42deeb85f3ed23b1f
[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" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff5acffc9aa4422e3ee21a3d6308390f5f525872aa5b0414391b30cd07d27a9e
[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" "ff5acffc9aa4422e3ee21a3d6308390f5f525872aa5b0414391b30cd07d27a9e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling signal-hook v0.3.9
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling tokio v1.10.0
[INFO] [stderr]     Checking futures-channel v0.3.16
[INFO] [stderr]     Checking textwrap v0.13.4
[INFO] [stderr]     Checking crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.7
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking socket2 v0.4.1
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking futures-util v0.3.16
[INFO] [stderr]     Checking polling v2.1.0
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.6.0
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking signal-hook-mio v0.2.1
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking crossterm v0.20.0
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking minus v4.0.1 (/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 36.71s
[INFO] running `Command { std: "docker" "inspect" "ff5acffc9aa4422e3ee21a3d6308390f5f525872aa5b0414391b30cd07d27a9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff5acffc9aa4422e3ee21a3d6308390f5f525872aa5b0414391b30cd07d27a9e", kill_on_drop: false }`
[INFO] [stdout] ff5acffc9aa4422e3ee21a3d6308390f5f525872aa5b0414391b30cd07d27a9e