[INFO] fetching crate async_buf_reader_utils 0.1.0...
[INFO] checking async_buf_reader_utils-0.1.0 against try#bb9dbf1d07454a99066eabaabd5819851281494b for pr-80920
[INFO] extracting crate async_buf_reader_utils 0.1.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate async_buf_reader_utils 0.1.0 on toolchain bb9dbf1d07454a99066eabaabd5819851281494b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate async_buf_reader_utils 0.1.0
[INFO] finished tweaking crates.io crate async_buf_reader_utils 0.1.0
[INFO] tweaked toml for crates.io crate async_buf_reader_utils 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bb9dbf1d07454a99066eabaabd5819851281494b" "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" "+bb9dbf1d07454a99066eabaabd5819851281494b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+bb9dbf1d07454a99066eabaabd5819851281494b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a557585cb60fcc84fe7616712eaa839935de410a793b0ceeaa6acf33ae77bc5c
[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" "a557585cb60fcc84fe7616712eaa839935de410a793b0ceeaa6acf33ae77bc5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a557585cb60fcc84fe7616712eaa839935de410a793b0ceeaa6acf33ae77bc5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a557585cb60fcc84fe7616712eaa839935de410a793b0ceeaa6acf33ae77bc5c", kill_on_drop: false }`
[INFO] [stdout] a557585cb60fcc84fe7616712eaa839935de410a793b0ceeaa6acf33ae77bc5c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+bb9dbf1d07454a99066eabaabd5819851281494b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4bece286c8a1a076d817391f9e88510996aff990adba622a98da64ce20536e5c
[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" "4bece286c8a1a076d817391f9e88510996aff990adba622a98da64ce20536e5c", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]     Checking futures-io v0.3.9
[INFO] [stderr]    Compiling log v0.4.13
[INFO] [stderr]     Checking fastrand v1.4.0
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.19
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking futures-channel v0.3.9
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking futures-task v0.3.9
[INFO] [stderr]     Checking async-channel v1.5.1
[INFO] [stderr]     Checking futures-lite v1.11.3
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.3.1
[INFO] [stderr]     Checking async-executor v1.4.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-global-executor v1.4.3
[INFO] [stderr]     Checking async-std v1.8.0
[INFO] [stderr]    Compiling futures-macro v0.3.9
[INFO] [stderr]     Checking futures-util v0.3.9
[INFO] [stderr]     Checking futures-executor v0.3.9
[INFO] [stderr]     Checking futures v0.3.9
[INFO] [stderr]     Checking async_buf_reader_utils v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `fs::File`, `task`
[INFO] [stdout]   --> src/read_until_index_found/mod.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 | use async_std::{fs::File, task};
[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 34.02s
[INFO] running `Command { std: "docker" "inspect" "4bece286c8a1a076d817391f9e88510996aff990adba622a98da64ce20536e5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bece286c8a1a076d817391f9e88510996aff990adba622a98da64ce20536e5c", kill_on_drop: false }`
[INFO] [stdout] 4bece286c8a1a076d817391f9e88510996aff990adba622a98da64ce20536e5c