[INFO] cloning repository https://github.com/samuel950/RustMandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/samuel950/RustMandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamuel950%2FRustMandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamuel950%2FRustMandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b0136c18bf75fcece808dcad6f5540f16aef3ff
[INFO] checking samuel950/RustMandelbrot against master#ac385a5af6d9fa8399a0cec799833cd28324abf8 for pr-125107
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamuel950%2FRustMandelbrot" "/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/samuel950/RustMandelbrot on toolchain ac385a5af6d9fa8399a0cec799833cd28324abf8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ac385a5af6d9fa8399a0cec799833cd28324abf8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/samuel950/RustMandelbrot
[INFO] finished tweaking git repo https://github.com/samuel950/RustMandelbrot
[INFO] tweaked toml for git repo https://github.com/samuel950/RustMandelbrot written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/samuel950/RustMandelbrot 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" "+ac385a5af6d9fa8399a0cec799833cd28324abf8" "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 samuel950/RustMandelbrot against try#9130c02509ce15f69dc5da6359bb9d140d41d4ac for pr-125107
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamuel950%2FRustMandelbrot" "/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/samuel950/RustMandelbrot on toolchain 9130c02509ce15f69dc5da6359bb9d140d41d4ac
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9130c02509ce15f69dc5da6359bb9d140d41d4ac" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/samuel950/RustMandelbrot
[INFO] finished tweaking git repo https://github.com/samuel950/RustMandelbrot
[INFO] tweaked toml for git repo https://github.com/samuel950/RustMandelbrot written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/samuel950/RustMandelbrot 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" "+9130c02509ce15f69dc5da6359bb9d140d41d4ac" "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-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+9130c02509ce15f69dc5da6359bb9d140d41d4ac" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6d1c713abc39c60a0a01bd7a7b3445b6a02037b0aa152911722770f4ee29237c
[INFO] running `Command { std: "docker" "start" "-a" "6d1c713abc39c60a0a01bd7a7b3445b6a02037b0aa152911722770f4ee29237c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d1c713abc39c60a0a01bd7a7b3445b6a02037b0aa152911722770f4ee29237c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d1c713abc39c60a0a01bd7a7b3445b6a02037b0aa152911722770f4ee29237c", kill_on_drop: false }`
[INFO] [stdout] 6d1c713abc39c60a0a01bd7a7b3445b6a02037b0aa152911722770f4ee29237c
[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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+9130c02509ce15f69dc5da6359bb9d140d41d4ac" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5a3e2f5e4b82d2b68d885b3d6b7ce07d66ccd6e41cd53f4347b896912ae8faa1
[INFO] running `Command { std: "docker" "start" "-a" "5a3e2f5e4b82d2b68d885b3d6b7ce07d66ccd6e41cd53f4347b896912ae8faa1", kill_on_drop: false }`
[INFO] [stderr]    Compiling version-compare v0.1.1
[INFO] [stderr]    Compiling libc v0.2.141
[INFO] [stderr]    Compiling sdl2 v0.35.2
[INFO] [stderr]    Compiling sdl2-sys v0.35.2
[INFO] [stderr]     Checking rust_mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `prop` is never read
[INFO] [stdout]   --> src/main.rs:75:17
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let mut prop: f64 = 0.0;
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `prop` is never read
[INFO] [stdout]   --> src/main.rs:75:17
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let mut prop: f64 = 0.0;
[INFO] [stdout]    |                 ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` 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` profile [unoptimized + debuginfo] target(s) in 3.45s
[INFO] running `Command { std: "docker" "inspect" "5a3e2f5e4b82d2b68d885b3d6b7ce07d66ccd6e41cd53f4347b896912ae8faa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a3e2f5e4b82d2b68d885b3d6b7ce07d66ccd6e41cd53f4347b896912ae8faa1", kill_on_drop: false }`
[INFO] [stdout] 5a3e2f5e4b82d2b68d885b3d6b7ce07d66ccd6e41cd53f4347b896912ae8faa1