[INFO] cloning repository https://github.com/asoans/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/asoans/rust_mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fasoans%2Frust_mandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fasoans%2Frust_mandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fee0246ced9786da574c3b8784136ad194ff4a63
[INFO] checking asoans/rust_mandelbrot against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fasoans%2Frust_mandelbrot" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
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[INFO] validating manifest of git repo https://github.com/asoans/rust_mandelbrot on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/asoans/rust_mandelbrot
[INFO] finished tweaking git repo https://github.com/asoans/rust_mandelbrot
[INFO] tweaked toml for git repo https://github.com/asoans/rust_mandelbrot written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/asoans/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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded actix-codec v0.5.1
[INFO] [stderr]   Downloaded actix-http v3.5.1
[INFO] [stderr]   Downloaded actix-cors v0.6.5
[INFO] [stderr]   Downloaded actix-web v4.4.1
[INFO] [stderr]   Downloaded actix-ws v0.2.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4ca2735105543914f953128e000ac064468ea335947438718ede2d08aeee282a
[INFO] running `Command { std: "docker" "start" "-a" "4ca2735105543914f953128e000ac064468ea335947438718ede2d08aeee282a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ca2735105543914f953128e000ac064468ea335947438718ede2d08aeee282a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ca2735105543914f953128e000ac064468ea335947438718ede2d08aeee282a", kill_on_drop: false }`
[INFO] [stdout] 4ca2735105543914f953128e000ac064468ea335947438718ede2d08aeee282a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b98379b6fa3cfb1329e5b3af2af6b51e6206f63fc85dc48ef69f40eaa511261
[INFO] running `Command { std: "docker" "start" "-a" "6b98379b6fa3cfb1329e5b3af2af6b51e6206f63fc85dc48ef69f40eaa511261", kill_on_drop: false }`
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[INFO] [stderr]     Checking actix-cors v0.6.5
[INFO] [stderr]     Checking rust_mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `actix_rt` is imported redundantly
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use actix_rt;
[INFO] [stdout]   |     ^^^^^^^^ the item `actix_rt` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]  --> src/ws_handlers.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `actix_rt` is imported redundantly
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use actix_rt;
[INFO] [stdout]   |     ^^^^^^^^ the item `actix_rt` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings 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 50.72s
[INFO] running `Command { std: "docker" "inspect" "6b98379b6fa3cfb1329e5b3af2af6b51e6206f63fc85dc48ef69f40eaa511261", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b98379b6fa3cfb1329e5b3af2af6b51e6206f63fc85dc48ef69f40eaa511261", kill_on_drop: false }`
[INFO] [stdout] 6b98379b6fa3cfb1329e5b3af2af6b51e6206f63fc85dc48ef69f40eaa511261
[INFO] checking asoans/rust_mandelbrot against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fasoans%2Frust_mandelbrot" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
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[INFO] validating manifest of git repo https://github.com/asoans/rust_mandelbrot on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/asoans/rust_mandelbrot
[INFO] finished tweaking git repo https://github.com/asoans/rust_mandelbrot
[INFO] tweaked toml for git repo https://github.com/asoans/rust_mandelbrot written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/asoans/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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70f299a6223ae254e8936a642f3ece5e469ca9eccf67673cf77e0c2e5c5169f3
[INFO] running `Command { std: "docker" "start" "-a" "70f299a6223ae254e8936a642f3ece5e469ca9eccf67673cf77e0c2e5c5169f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70f299a6223ae254e8936a642f3ece5e469ca9eccf67673cf77e0c2e5c5169f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70f299a6223ae254e8936a642f3ece5e469ca9eccf67673cf77e0c2e5c5169f3", kill_on_drop: false }`
[INFO] [stdout] 70f299a6223ae254e8936a642f3ece5e469ca9eccf67673cf77e0c2e5c5169f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 75af6900eb599a04bdff2d5b64f9519f4034fe490fd9ebab471bdcd341dbce09
[INFO] running `Command { std: "docker" "start" "-a" "75af6900eb599a04bdff2d5b64f9519f4034fe490fd9ebab471bdcd341dbce09", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.152
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking smallvec v1.11.2
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[INFO] [stderr]    Compiling serde v1.0.195
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[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]     Checking alloc-no-stdlib v2.0.4
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[INFO] [stderr]    Compiling zstd-safe v7.0.0
[INFO] [stderr]     Checking tracing-core v0.1.32
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[INFO] [stderr]    Compiling rayon-core v1.12.0
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[INFO] [stderr]    Compiling tokio-macros v2.2.0
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[INFO] [stderr]     Checking actix-cors v0.6.5
[INFO] [stderr]     Checking rust_mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `actix_rt` is imported redundantly
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use actix_rt;
[INFO] [stdout]   |     ^^^^^^^^ the item `actix_rt` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]  --> src/ws_handlers.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use serde_json;
[INFO] [stdout]   |     ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `actix_rt` is imported redundantly
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use actix_rt;
[INFO] [stdout]   |     ^^^^^^^^ the item `actix_rt` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings 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 23.66s
[INFO] running `Command { std: "docker" "inspect" "75af6900eb599a04bdff2d5b64f9519f4034fe490fd9ebab471bdcd341dbce09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "75af6900eb599a04bdff2d5b64f9519f4034fe490fd9ebab471bdcd341dbce09", kill_on_drop: false }`
[INFO] [stdout] 75af6900eb599a04bdff2d5b64f9519f4034fe490fd9ebab471bdcd341dbce09