[INFO] fetching crate async_buf_reader_utils 0.1.0...
[INFO] checking async_buf_reader_utils-0.1.0 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate async_buf_reader_utils 0.1.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate async_buf_reader_utils 0.1.0 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7db6a332bdfe2044f22926f3aa03b61516c5b29ae57bc52ed7e9ea81ecf795a2
[INFO] running `Command { std: "docker" "start" "-a" "7db6a332bdfe2044f22926f3aa03b61516c5b29ae57bc52ed7e9ea81ecf795a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7db6a332bdfe2044f22926f3aa03b61516c5b29ae57bc52ed7e9ea81ecf795a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7db6a332bdfe2044f22926f3aa03b61516c5b29ae57bc52ed7e9ea81ecf795a2", kill_on_drop: false }`
[INFO] [stdout] 7db6a332bdfe2044f22926f3aa03b61516c5b29ae57bc52ed7e9ea81ecf795a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 854d6ae821d470de35039d616624b16906d80fed010f2f9f3f7f3ed975d5231f
[INFO] running `Command { std: "docker" "start" "-a" "854d6ae821d470de35039d616624b16906d80fed010f2f9f3f7f3ed975d5231f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]     Checking futures-io v0.3.18
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking futures-sink v0.3.18
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.8
[INFO] [stderr]     Checking async-mutex v1.4.0
[INFO] [stderr]     Checking async-lock v2.4.0
[INFO] [stderr]     Checking crossbeam-utils v0.8.5
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking futures-channel v0.3.18
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking blocking v1.1.0
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking socket2 v0.4.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]    Compiling ctor v0.1.21
[INFO] [stderr]    Compiling futures-macro v0.3.18
[INFO] [stderr]     Checking polling v2.2.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.6.0
[INFO] [stderr]     Checking futures-util v0.3.18
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-std v1.10.0
[INFO] [stderr]     Checking futures-executor v0.3.18
[INFO] [stderr]     Checking futures v0.3.18
[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 25.15s
[INFO] running `Command { std: "docker" "inspect" "854d6ae821d470de35039d616624b16906d80fed010f2f9f3f7f3ed975d5231f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "854d6ae821d470de35039d616624b16906d80fed010f2f9f3f7f3ed975d5231f", kill_on_drop: false }`
[INFO] [stdout] 854d6ae821d470de35039d616624b16906d80fed010f2f9f3f7f3ed975d5231f