[INFO] cloning repository https://github.com/t0814524/rust-mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/t0814524/rust-mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft0814524%2Frust-mandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft0814524%2Frust-mandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d05cdb34e5aa4627cb455c48e611069e24ac47a5
[INFO] checking t0814524/rust-mandelbrot against master#fb4bca04fa1bde2f7db1b31a59e066f7bebd7fc6 for pr-120361
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft0814524%2Frust-mandelbrot" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/t0814524/rust-mandelbrot on toolchain fb4bca04fa1bde2f7db1b31a59e066f7bebd7fc6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fb4bca04fa1bde2f7db1b31a59e066f7bebd7fc6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/t0814524/rust-mandelbrot
[INFO] finished tweaking git repo https://github.com/t0814524/rust-mandelbrot
[INFO] tweaked toml for git repo https://github.com/t0814524/rust-mandelbrot written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/t0814524/rust-mandelbrot 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" "+fb4bca04fa1bde2f7db1b31a59e066f7bebd7fc6" "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 t0814524/rust-mandelbrot against try#e35e259478581c01033b8da67214c0d376859a32 for pr-120361
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ft0814524%2Frust-mandelbrot" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/t0814524/rust-mandelbrot on toolchain e35e259478581c01033b8da67214c0d376859a32
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e35e259478581c01033b8da67214c0d376859a32" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/t0814524/rust-mandelbrot
[INFO] finished tweaking git repo https://github.com/t0814524/rust-mandelbrot
[INFO] tweaked toml for git repo https://github.com/t0814524/rust-mandelbrot written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/t0814524/rust-mandelbrot 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" "+e35e259478581c01033b8da67214c0d376859a32" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+e35e259478581c01033b8da67214c0d376859a32" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5874a4be6cacfc36db8ceff156b1030a3a8364c5be92779f0853a09a0a10f73e
[INFO] running `Command { std: "docker" "start" "-a" "5874a4be6cacfc36db8ceff156b1030a3a8364c5be92779f0853a09a0a10f73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5874a4be6cacfc36db8ceff156b1030a3a8364c5be92779f0853a09a0a10f73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5874a4be6cacfc36db8ceff156b1030a3a8364c5be92779f0853a09a0a10f73e", kill_on_drop: false }`
[INFO] [stdout] 5874a4be6cacfc36db8ceff156b1030a3a8364c5be92779f0853a09a0a10f73e
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+e35e259478581c01033b8da67214c0d376859a32" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a7cc0efcdd4f42e05c9749df4e8dfd695c873745a6f4881be46fa664bf33cff
[INFO] running `Command { std: "docker" "start" "-a" "3a7cc0efcdd4f42e05c9749df4e8dfd695c873745a6f4881be46fa664bf33cff", kill_on_drop: false }`
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/mandelbrot.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 | / ...   /**
[INFO] [stdout] 37 | | ...    * assignment says here if check_pixel return some IT IS in the set  
[INFO] [stdout] 38 | | ...    * but it also says about the implementation of the check_pixel fn that it's NOT IN THE SET if it returns Some. so what is it?? idk...
[INFO] [stdout] 39 | | ...    */
[INFO] [stdout]    | |_________^
[INFO] [stdout] 40 | / ...   match check_pixel(c, max_iterations) {
[INFO] [stdout] 41 | | ...       Some(_) => {
[INFO] [stdout] 42 | | ...           // let p = image.data[i];
[INFO] [stdout] 43 | | ...           // idk what for but says so in specification
[INFO] [stdout] ...  |
[INFO] [stdout] 53 | | ...       None => {}
[INFO] [stdout] 54 | | ...   }
[INFO] [stdout]    | |_______- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `/* */` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/mandelbrot.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 | / ...   /**
[INFO] [stdout] 37 | | ...    * assignment says here if check_pixel return some IT IS in the set  
[INFO] [stdout] 38 | | ...    * but it also says about the implementation of the check_pixel fn that it's NOT IN THE SET if it returns Some. so what is it?? idk...
[INFO] [stdout] 39 | | ...    */
[INFO] [stdout]    | |_________^
[INFO] [stdout] 40 | / ...   match check_pixel(c, max_iterations) {
[INFO] [stdout] 41 | | ...       Some(_) => {
[INFO] [stdout] 42 | | ...           // let p = image.data[i];
[INFO] [stdout] 43 | | ...           // idk what for but says so in specification
[INFO] [stdout] ...  |
[INFO] [stdout] 53 | | ...       None => {}
[INFO] [stdout] 54 | | ...   }
[INFO] [stdout]    | |_______- rustdoc does not generate documentation for expressions
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `/* */` for a plain comment
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "3a7cc0efcdd4f42e05c9749df4e8dfd695c873745a6f4881be46fa664bf33cff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a7cc0efcdd4f42e05c9749df4e8dfd695c873745a6f4881be46fa664bf33cff", kill_on_drop: false }`
[INFO] [stdout] 3a7cc0efcdd4f42e05c9749df4e8dfd695c873745a6f4881be46fa664bf33cff