[INFO] cloning repository https://github.com/arvaer/mapreduce
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arvaer/mapreduce" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farvaer%2Fmapreduce", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farvaer%2Fmapreduce'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 08d18c754083e94cc4b797f3c9098fa8cb820296
[INFO] testing arvaer/mapreduce against try#a7ee93192a766fb0dafa23def7154fc03cfcfc3e for pr-146989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farvaer%2Fmapreduce" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/arvaer/mapreduce
[INFO] finished tweaking git repo https://github.com/arvaer/mapreduce
[INFO] tweaked toml for git repo https://github.com/arvaer/mapreduce written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/arvaer/mapreduce on toolchain a7ee93192a766fb0dafa23def7154fc03cfcfc3e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/arvaer/mapreduce 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" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "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] testing arvaer/mapreduce against try#a7ee93192a766fb0dafa23def7154fc03cfcfc3e for pr-146989
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farvaer%2Fmapreduce" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/arvaer/mapreduce
[INFO] finished tweaking git repo https://github.com/arvaer/mapreduce
[INFO] tweaked toml for git repo https://github.com/arvaer/mapreduce written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/arvaer/mapreduce on toolchain a7ee93192a766fb0dafa23def7154fc03cfcfc3e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/arvaer/mapreduce 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" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bytes v1.5.0
[INFO] [stderr]   Downloaded tokio-macros v2.2.0
[INFO] [stderr]   Downloaded file-lock v2.1.10
[INFO] [stderr]   Downloaded socket2 v0.5.5
[INFO] [stderr]   Downloaded mio v0.8.10
[INFO] [stderr]   Downloaded syn v2.0.41
[INFO] [stderr]   Downloaded tokio v1.35.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d20c7b4c84535478526b58cdf056af00214fcbb92dfa98286f0022e41239bc63
[INFO] running `Command { std: "docker" "start" "-a" "d20c7b4c84535478526b58cdf056af00214fcbb92dfa98286f0022e41239bc63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d20c7b4c84535478526b58cdf056af00214fcbb92dfa98286f0022e41239bc63", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d20c7b4c84535478526b58cdf056af00214fcbb92dfa98286f0022e41239bc63", kill_on_drop: false }`
[INFO] [stdout] d20c7b4c84535478526b58cdf056af00214fcbb92dfa98286f0022e41239bc63
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+a7ee93192a766fb0dafa23def7154fc03cfcfc3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3d1ab04c1c9b4cbae385fb4841c7b179a13a5274bb7dc482d65d58e7e6db3ad6
[INFO] running `Command { std: "docker" "start" "-a" "3d1ab04c1c9b4cbae385fb4841c7b179a13a5274bb7dc482d65d58e7e6db3ad6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.70
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling futures-core v0.3.29
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling futures-task v0.3.29
[INFO] [stderr]    Compiling futures-channel v0.3.29
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling futures-sink v0.3.29
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling pin-project-lite v0.2.13
[INFO] [stderr]    Compiling futures-util v0.3.29
[INFO] [stderr]    Compiling smallvec v1.11.2
[INFO] [stderr]    Compiling memchr v2.6.4
[INFO] [stderr]    Compiling futures-io v0.3.29
[INFO] [stderr]    Compiling bytes v1.5.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling mio v0.8.10
[INFO] [stderr]    Compiling signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling syn v2.0.41
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling socket2 v0.5.5
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling file-lock v2.1.10
[INFO] [stderr]    Compiling futures-macro v0.3.29
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling tokio v1.35.0
[INFO] [stderr]    Compiling futures-executor v0.3.29
[INFO] [stderr]    Compiling futures v0.3.29
[INFO] [stderr]    Compiling tinymapreduce v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `file_lock::*`
[INFO] [stdout]  --> src/mapper.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use file_lock::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::writer::WriterHandle`
[INFO] [stdout]   --> src/mapper.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use crate::writer::WriterHandle;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `?` couldn't convert the error to `error::Error`
[INFO] [stdout]   --> src/main.rs:92:47
[INFO] [stdout]    |
[INFO] [stdout] 92 |     let mut files = std::fs::read_dir("./tmp")?
[INFO] [stdout]    |                     --------------------------^ the trait `From<std::io::Error>` is not implemented for `error::Error`
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     this can't be annotated with `?` because it has type `Result<_, std::io::Error>`
[INFO] [stdout]    |
[INFO] [stdout] note: `error::Error` needs to implement `From<std::io::Error>`
[INFO] [stdout]   --> src/error.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub enum Error {
[INFO] [stdout]    | ^^^^^^^^^^^^^^
[INFO] [stdout]    = note: the question mark operation (`?`) implicitly performs a conversion on the error value using the `From` trait
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `respond_to`
[INFO] [stdout]   --> src/reducer.rs:29:40
[INFO] [stdout]    |
[INFO] [stdout] 29 |             ReducerMessage:: Shuffle { respond_to, partition_name } => {
[INFO] [stdout]    |                                        ^^^^^^^^^^ help: try ignoring the field: `respond_to: _`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `partition_name`
[INFO] [stdout]   --> src/reducer.rs:29:52
[INFO] [stdout]    |
[INFO] [stdout] 29 |             ReducerMessage:: Shuffle { respond_to, partition_name } => {
[INFO] [stdout]    |                                                    ^^^^^^^^^^^^^^ help: try ignoring the field: `partition_name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `respond_to`
[INFO] [stdout]   --> src/reducer.rs:32:39
[INFO] [stdout]    |
[INFO] [stdout] 32 |             ReducerMessage:: Reduce { respond_to, partition_name} => {
[INFO] [stdout]    |                                       ^^^^^^^^^^ help: try ignoring the field: `respond_to: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `partition_name`
[INFO] [stdout]   --> src/reducer.rs:32:51
[INFO] [stdout]    |
[INFO] [stdout] 32 |             ReducerMessage:: Reduce { respond_to, partition_name} => {
[INFO] [stdout]    |                                                   ^^^^^^^^^^^^^^ help: try ignoring the field: `partition_name: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tinymapreduce` (bin "tinymapreduce") due to 1 previous error; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "3d1ab04c1c9b4cbae385fb4841c7b179a13a5274bb7dc482d65d58e7e6db3ad6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d1ab04c1c9b4cbae385fb4841c7b179a13a5274bb7dc482d65d58e7e6db3ad6", kill_on_drop: false }`
[INFO] [stdout] 3d1ab04c1c9b4cbae385fb4841c7b179a13a5274bb7dc482d65d58e7e6db3ad6