[INFO] cloning repository https://github.com/pl728/rust-concurrent-processor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pl728/rust-concurrent-processor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpl728%2Frust-concurrent-processor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpl728%2Frust-concurrent-processor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c2dea19e79a678ec60d058e2161bf2ddbe3fa223
[INFO] checking pl728/rust-concurrent-processor against try#d336647335db03a0fc5b24fc5325cd3905c5b8e8 for pr-151146
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpl728%2Frust-concurrent-processor" "/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/pl728/rust-concurrent-processor
[INFO] finished tweaking git repo https://github.com/pl728/rust-concurrent-processor
[INFO] tweaked toml for git repo https://github.com/pl728/rust-concurrent-processor written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pl728/rust-concurrent-processor on toolchain d336647335db03a0fc5b24fc5325cd3905c5b8e8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/pl728/rust-concurrent-processor 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" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "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
[ERROR] error running command: no output for 300 seconds
[INFO] checking pl728/rust-concurrent-processor against try#d336647335db03a0fc5b24fc5325cd3905c5b8e8 for pr-151146
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpl728%2Frust-concurrent-processor" "/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/pl728/rust-concurrent-processor
[INFO] finished tweaking git repo https://github.com/pl728/rust-concurrent-processor
[INFO] tweaked toml for git repo https://github.com/pl728/rust-concurrent-processor written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/pl728/rust-concurrent-processor on toolchain d336647335db03a0fc5b24fc5325cd3905c5b8e8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/pl728/rust-concurrent-processor 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" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "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-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" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 882db0d6f2093213919e6a404e2309006e68fc0d3cc9605cc26ee5511ce40675
[INFO] running `Command { std: "docker" "start" "-a" "882db0d6f2093213919e6a404e2309006e68fc0d3cc9605cc26ee5511ce40675", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "882db0d6f2093213919e6a404e2309006e68fc0d3cc9605cc26ee5511ce40675", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "882db0d6f2093213919e6a404e2309006e68fc0d3cc9605cc26ee5511ce40675", kill_on_drop: false }`
[INFO] [stdout] 882db0d6f2093213919e6a404e2309006e68fc0d3cc9605cc26ee5511ce40675
[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" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c2c85c1e648f2480e1de0506839a3b14abb74d8a3c69930a2948284955699e4c
[INFO] running `Command { std: "docker" "start" "-a" "c2c85c1e648f2480e1de0506839a3b14abb74d8a3c69930a2948284955699e4c", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-concurrent-processor v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/part2b.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     for i in 0..3 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/part2b.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     for i in 0..3 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/part2b.rs:66:34
[INFO] [stdout]    |
[INFO] [stdout] 66 |             TaskResult::Success {id, result} => {
[INFO] [stdout]    |                                  ^^ help: try ignoring the field: `id: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/part2b.rs:66:34
[INFO] [stdout]    |
[INFO] [stdout] 66 |             TaskResult::Success {id, result} => {
[INFO] [stdout]    |                                  ^^ help: try ignoring the field: `id: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/part2b.rs:69:31
[INFO] [stdout]    |
[INFO] [stdout] 69 |             TaskResult::Error{id, error} => {
[INFO] [stdout]    |                               ^^ help: try ignoring the field: `id: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]   --> src/part2b.rs:69:31
[INFO] [stdout]    |
[INFO] [stdout] 69 |             TaskResult::Error{id, error} => {
[INFO] [stdout]    |                               ^^ help: try ignoring the field: `id: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]   --> src/project.rs:71:40
[INFO] [stdout]    |
[INFO] [stdout] 71 | ...                   Ok(msg) => TaskResult::Success {
[INFO] [stdout]    |                          ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]   --> src/project.rs:86:40
[INFO] [stdout]    |
[INFO] [stdout] 86 | ...                   Ok(msg) => TaskResult::Success {
[INFO] [stdout]    |                          ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]    --> src/project.rs:101:40
[INFO] [stdout]     |
[INFO] [stdout] 101 | ...                   Ok(msg) => TaskResult::Success {
[INFO] [stdout]     |                          ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/project.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     for i in 0..4 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]   --> src/project.rs:71:40
[INFO] [stdout]    |
[INFO] [stdout] 71 | ...                   Ok(msg) => TaskResult::Success {
[INFO] [stdout]    |                          ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]   --> src/project.rs:86:40
[INFO] [stdout]    |
[INFO] [stdout] 86 | ...                   Ok(msg) => TaskResult::Success {
[INFO] [stdout]    |                          ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg`
[INFO] [stdout]    --> src/project.rs:101:40
[INFO] [stdout]     |
[INFO] [stdout] 101 | ...                   Ok(msg) => TaskResult::Success {
[INFO] [stdout]     |                          ^^^ help: if this is intentional, prefix it with an underscore: `_msg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/project.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |     for i in 0..4 {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]    --> src/project.rs:175:20
[INFO] [stdout]     |
[INFO] [stdout] 175 | fn process_compute(id: u32, iterations: u32) -> Result<String, String> {
[INFO] [stdout]     |                    ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]    --> src/project.rs:175:20
[INFO] [stdout]     |
[INFO] [stdout] 175 | fn process_compute(id: u32, iterations: u32) -> Result<String, String> {
[INFO] [stdout]     |                    ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]    --> src/project.rs:189:17
[INFO] [stdout]     |
[INFO] [stdout] 189 | fn process_data(id: u32, data: Vec<u32>) -> Result<String, String> {
[INFO] [stdout]     |                 ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `id`
[INFO] [stdout]    --> src/project.rs:189:17
[INFO] [stdout]     |
[INFO] [stdout] 189 | fn process_data(id: u32, data: Vec<u32>) -> Result<String, String> {
[INFO] [stdout]     |                 ^^ help: if this is intentional, prefix it with an underscore: `_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/part2a.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Success { id: u32, result: String },
[INFO] [stdout]    |     -------   ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/part2a.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Error { id: u32, error: String },
[INFO] [stdout]    |     -----   ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `active_workers` is never read
[INFO] [stdout]   --> src/project.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct SystemStats {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 25 |     active_workers: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/part2a.rs:11:15
[INFO] [stdout]    |
[INFO] [stdout] 11 |     Success { id: u32, result: String },
[INFO] [stdout]    |     -------   ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `id` is never read
[INFO] [stdout]   --> src/part2a.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |     Error { id: u32, error: String },
[INFO] [stdout]    |     -----   ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `active_workers` is never read
[INFO] [stdout]   --> src/project.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct SystemStats {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 25 |     active_workers: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "c2c85c1e648f2480e1de0506839a3b14abb74d8a3c69930a2948284955699e4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2c85c1e648f2480e1de0506839a3b14abb74d8a3c69930a2948284955699e4c", kill_on_drop: false }`
[INFO] [stdout] c2c85c1e648f2480e1de0506839a3b14abb74d8a3c69930a2948284955699e4c