[INFO] cloning repository https://github.com/therustdeveloper/learning-tokio
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/therustdeveloper/learning-tokio" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftherustdeveloper%2Flearning-tokio", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftherustdeveloper%2Flearning-tokio'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ef9ef86b3224507099c96a9c98c5efac9e813a24
[INFO] checking therustdeveloper/learning-tokio against master#7c4ac0603e9ee5295bc802c90575391288a69a8a for pr-124728
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftherustdeveloper%2Flearning-tokio" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/therustdeveloper/learning-tokio on toolchain 7c4ac0603e9ee5295bc802c90575391288a69a8a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7c4ac0603e9ee5295bc802c90575391288a69a8a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/therustdeveloper/learning-tokio
[INFO] finished tweaking git repo https://github.com/therustdeveloper/learning-tokio
[INFO] tweaked toml for git repo https://github.com/therustdeveloper/learning-tokio written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/therustdeveloper/learning-tokio already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7c4ac0603e9ee5295bc802c90575391288a69a8a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking therustdeveloper/learning-tokio against try#98ebbae35138252af77610c20ea5a5e8bf68d639 for pr-124728
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftherustdeveloper%2Flearning-tokio" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/therustdeveloper/learning-tokio on toolchain 98ebbae35138252af77610c20ea5a5e8bf68d639
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+98ebbae35138252af77610c20ea5a5e8bf68d639" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/therustdeveloper/learning-tokio
[INFO] finished tweaking git repo https://github.com/therustdeveloper/learning-tokio
[INFO] tweaked toml for git repo https://github.com/therustdeveloper/learning-tokio written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/therustdeveloper/learning-tokio already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+98ebbae35138252af77610c20ea5a5e8bf68d639" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking therustdeveloper/learning-tokio against try#98ebbae35138252af77610c20ea5a5e8bf68d639 for pr-124728
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftherustdeveloper%2Flearning-tokio" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/therustdeveloper/learning-tokio on toolchain 98ebbae35138252af77610c20ea5a5e8bf68d639
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+98ebbae35138252af77610c20ea5a5e8bf68d639" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/therustdeveloper/learning-tokio
[INFO] finished tweaking git repo https://github.com/therustdeveloper/learning-tokio
[INFO] tweaked toml for git repo https://github.com/therustdeveloper/learning-tokio written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/therustdeveloper/learning-tokio already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+98ebbae35138252af77610c20ea5a5e8bf68d639" "fetch" "--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 mini-redis v0.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+98ebbae35138252af77610c20ea5a5e8bf68d639" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39a8bd4b19fd280c09c721b870f741b2e38ca72173f8d60af31b73a3ae23ea91
[INFO] running `Command { std: "docker" "start" "-a" "39a8bd4b19fd280c09c721b870f741b2e38ca72173f8d60af31b73a3ae23ea91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39a8bd4b19fd280c09c721b870f741b2e38ca72173f8d60af31b73a3ae23ea91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39a8bd4b19fd280c09c721b870f741b2e38ca72173f8d60af31b73a3ae23ea91", kill_on_drop: false }`
[INFO] [stdout] 39a8bd4b19fd280c09c721b870f741b2e38ca72173f8d60af31b73a3ae23ea91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "RUSTDOCFLAGS=--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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+98ebbae35138252af77610c20ea5a5e8bf68d639" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e14d42f6d67775e5abef11f2c30fcf80cf751f009f033748cd692b94e66bd450
[INFO] running `Command { std: "docker" "start" "-a" "e14d42f6d67775e5abef11f2c30fcf80cf751f009f033748cd692b94e66bd450", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling libc v0.2.152
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking smallvec v1.13.1
[INFO] [stderr]    Compiling serde v1.0.195
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling serde_json v1.0.111
[INFO] [stderr]     Checking unicode-width v0.1.11
[INFO] [stderr]     Checking regex-syntax v0.6.29
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking iana-time-zone v0.1.59
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]     Checking ryu v1.0.16
[INFO] [stderr]     Checking bytes v1.5.0
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking parking_lot_core v0.9.9
[INFO] [stderr]     Checking regex-automata v0.4.4
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking socket2 v0.5.5
[INFO] [stderr]     Checking signal-hook-registry v1.4.1
[INFO] [stderr]     Checking mio v0.8.10
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking chrono v0.4.32
[INFO] [stderr]     Checking tracing-log v0.1.4
[INFO] [stderr]     Checking sharded-slab v0.1.7
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking thread_local v1.1.7
[INFO] [stderr]     Checking atoi v0.3.3
[INFO] [stderr]     Checking tracing-serde v0.1.3
[INFO] [stderr]     Checking regex v1.10.3
[INFO] [stderr]     Checking matchers v0.0.1
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling pin-project-internal v1.1.3
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling async-stream-impl v0.3.5
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking tokio v1.35.1
[INFO] [stderr]     Checking async-stream v0.3.5
[INFO] [stderr]     Checking pin-project v1.1.3
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking tracing-subscriber v0.2.25
[INFO] [stderr]     Checking tokio-stream v0.1.14
[INFO] [stderr]     Checking mini-redis v0.4.1
[INFO] [stderr]     Checking learning-tokio v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.03s
[INFO] running `Command { std: "docker" "inspect" "e14d42f6d67775e5abef11f2c30fcf80cf751f009f033748cd692b94e66bd450", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e14d42f6d67775e5abef11f2c30fcf80cf751f009f033748cd692b94e66bd450", kill_on_drop: false }`
[INFO] [stdout] e14d42f6d67775e5abef11f2c30fcf80cf751f009f033748cd692b94e66bd450