[INFO] fetching crate tree-buf 0.10.0...
[INFO] checking tree-buf-0.10.0 against try#82acd1d76add2232e19c1f0feb250d2a19ec6efe for pr-81213
[INFO] extracting crate tree-buf 0.10.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate tree-buf 0.10.0 on toolchain 82acd1d76add2232e19c1f0feb250d2a19ec6efe
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tree-buf 0.10.0
[INFO] finished tweaking crates.io crate tree-buf 0.10.0
[INFO] tweaked toml for crates.io crate tree-buf 0.10.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "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" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "fetch" "--locked" "--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 defer v0.1.0
[INFO] [stderr]   Downloaded gibbon v0.1.3
[INFO] [stderr]   Downloaded firestorm v0.3.0
[INFO] [stderr]   Downloaded simple-16 v0.2.0
[INFO] [stderr]   Downloaded tree-buf-macros v0.10.0
[INFO] [stderr]   Downloaded zigzag v0.1.0
[INFO] [stderr]   Downloaded coercible_errors v0.1.4
[INFO] [stderr]   Downloaded transmute v0.1.1
[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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 829894b22a9a79a85e4532ba4b61e1857ae603faa2ffad2ef794f100a1cef77e
[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" "829894b22a9a79a85e4532ba4b61e1857ae603faa2ffad2ef794f100a1cef77e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "829894b22a9a79a85e4532ba4b61e1857ae603faa2ffad2ef794f100a1cef77e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "829894b22a9a79a85e4532ba4b61e1857ae603faa2ffad2ef794f100a1cef77e", kill_on_drop: false }`
[INFO] [stdout] 829894b22a9a79a85e4532ba4b61e1857ae603faa2ffad2ef794f100a1cef77e
[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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d1e2102815c9492ae243084aed8fc177f4db1ea2071dd20aba832a3fab50a2d1
[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" "d1e2102815c9492ae243084aed8fc177f4db1ea2071dd20aba832a3fab50a2d1", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]     Checking firestorm v0.3.0
[INFO] [stderr]     Checking defer v0.1.0
[INFO] [stderr]     Checking transmute v0.1.1
[INFO] [stderr]     Checking gibbon v0.1.3
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]    Compiling thread_local v1.1.1
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking crossbeam-utils v0.8.1
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking zigzag v0.1.0
[INFO] [stderr]     Checking simple-16 v0.2.0
[INFO] [stderr]    Compiling aho-corasick v0.7.15
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking backtrace v0.3.56
[INFO] [stderr]     Checking csv v1.1.5
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]    Compiling regex v1.4.3
[INFO] [stderr]     Checking coercible_errors v0.1.4
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]    Compiling Inflector v0.11.4
[INFO] [stderr]    Compiling tree-buf-macros v0.10.0
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stderr]     Checking tree-buf v0.10.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `tree_buf::prelude::*`
[INFO] [stdout]  --> benches/float_list.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tree_buf::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.23s
[INFO] running `Command { std: "docker" "inspect" "d1e2102815c9492ae243084aed8fc177f4db1ea2071dd20aba832a3fab50a2d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d1e2102815c9492ae243084aed8fc177f4db1ea2071dd20aba832a3fab50a2d1", kill_on_drop: false }`
[INFO] [stdout] d1e2102815c9492ae243084aed8fc177f4db1ea2071dd20aba832a3fab50a2d1