[INFO] cloning repository https://github.com/gtr/mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gtr/mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgtr%2Fmandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgtr%2Fmandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e175b758f6b23e9146a9c3a1e43076273217709d
[INFO] testing gtr/mandelbrot against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgtr%2Fmandelbrot" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/gtr/mandelbrot
[INFO] finished tweaking git repo https://github.com/gtr/mandelbrot
[INFO] tweaked toml for git repo https://github.com/gtr/mandelbrot written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/gtr/mandelbrot on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/gtr/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" "+beta-2026-04-21" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 291e5828adc19ec0db7f3b64f21ca956db891d37cc91eab0a4c346700066dcb1
[INFO] running `Command { std: "docker" "start" "-a" "291e5828adc19ec0db7f3b64f21ca956db891d37cc91eab0a4c346700066dcb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "291e5828adc19ec0db7f3b64f21ca956db891d37cc91eab0a4c346700066dcb1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "291e5828adc19ec0db7f3b64f21ca956db891d37cc91eab0a4c346700066dcb1", kill_on_drop: false }`
[INFO] [stdout] 291e5828adc19ec0db7f3b64f21ca956db891d37cc91eab0a4c346700066dcb1
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca0f94c01af1c7e445b9a695420650771a5ee80e50e7dccdc957fd5134f7d143
[INFO] running `Command { std: "docker" "start" "-a" "ca0f94c01af1c7e445b9a695420650771a5ee80e50e7dccdc957fd5134f7d143", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling libc v0.2.171
[INFO] [stderr]    Compiling simd-adler32 v0.3.7
[INFO] [stderr]    Compiling anyhow v1.0.97
[INFO] [stderr]    Compiling adler2 v2.0.0
[INFO] [stderr]    Compiling built v0.7.7
[INFO] [stderr]    Compiling zerocopy v0.8.24
[INFO] [stderr]    Compiling aligned-vec v0.5.0
[INFO] [stderr]    Compiling memchr v2.7.4
[INFO] [stderr]    Compiling getrandom v0.3.2
[INFO] [stderr]    Compiling crc32fast v1.4.2
[INFO] [stderr]    Compiling weezl v0.1.8
[INFO] [stderr]    Compiling imgref v1.11.0
[INFO] [stderr]    Compiling quick-error v2.0.1
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling noop_proc_macro v0.3.0
[INFO] [stderr]    Compiling bitstream-io v2.6.0
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.6
[INFO] [stderr]    Compiling loop9 v0.1.5
[INFO] [stderr]    Compiling miniz_oxide v0.8.7
[INFO] [stderr]    Compiling v_frame v0.3.8
[INFO] [stderr]    Compiling zune-inflate v0.2.54
[INFO] [stderr]    Compiling fdeflate v0.3.7
[INFO] [stderr]    Compiling avif-serialize v0.8.3
[INFO] [stderr]    Compiling half v2.5.0
[INFO] [stderr]    Compiling rav1e v0.7.1
[INFO] [stderr]    Compiling zune-core v0.4.12
[INFO] [stderr]    Compiling bytemuck v1.22.0
[INFO] [stderr]    Compiling jpeg-decoder v0.3.1
[INFO] [stderr]    Compiling color_quant v1.1.0
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling bit_field v0.10.2
[INFO] [stderr]    Compiling rgb v0.8.50
[INFO] [stderr]    Compiling lebe v0.5.2
[INFO] [stderr]    Compiling byteorder-lite v0.1.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling smallvec v1.15.0
[INFO] [stderr]    Compiling flate2 v1.1.1
[INFO] [stderr]    Compiling qoi v0.4.1
[INFO] [stderr]    Compiling gif v0.13.1
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]    Compiling simd_helpers v0.1.0
[INFO] [stderr]    Compiling exr v1.73.0
[INFO] [stderr]    Compiling image-webp v0.2.1
[INFO] [stderr]    Compiling zune-jpeg v0.4.14
[INFO] [stderr]    Compiling num-complex v0.4.6
[INFO] [stderr]    Compiling num-rational v0.4.2
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling tiff v0.9.1
[INFO] [stderr]    Compiling png v0.17.16
[INFO] [stderr]    Compiling ppv-lite86 v0.2.21
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling rand v0.9.0
[INFO] [stderr]    Compiling maybe-rayon v0.1.1
[INFO] [stderr]    Compiling av1-grain v0.2.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling profiling-procmacros v1.0.16
[INFO] [stderr]    Compiling num-derive v0.4.2
[INFO] [stderr]    Compiling arg_enum_proc_macro v0.3.4
[INFO] [stderr]    Compiling profiling v1.0.16
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling ravif v0.11.11
[INFO] [stderr]    Compiling image v0.25.6
[INFO] [stderr]    Compiling mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: renamed to `rng`
[INFO] [stdout]   --> src/main.rs:26:25
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mut rng = rand::thread_rng();
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:30:10
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let (mut center_re, mut center_im, mut zoom);
[INFO] [stdout]    |          ----^^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:30:25
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let (mut center_re, mut center_im, mut zoom);
[INFO] [stdout]    |                         ----^^^^^^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:30:40
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let (mut center_re, mut center_im, mut zoom);
[INFO] [stdout]    |                                        ----^^^^
[INFO] [stdout]    |                                        |
[INFO] [stdout]    |                                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 37.50s
[INFO] running `Command { std: "docker" "inspect" "ca0f94c01af1c7e445b9a695420650771a5ee80e50e7dccdc957fd5134f7d143", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca0f94c01af1c7e445b9a695420650771a5ee80e50e7dccdc957fd5134f7d143", kill_on_drop: false }`
[INFO] [stdout] ca0f94c01af1c7e445b9a695420650771a5ee80e50e7dccdc957fd5134f7d143
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8fcda9cc39e3d00b9e6434607690afb5eefa1c86371fefa8c7be90f817e3f07c
[INFO] running `Command { std: "docker" "start" "-a" "8fcda9cc39e3d00b9e6434607690afb5eefa1c86371fefa8c7be90f817e3f07c", kill_on_drop: false }`
[INFO] [stderr]    Compiling mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated function `rand::thread_rng`: renamed to `rng`
[INFO] [stdout]   --> src/main.rs:26:25
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mut rng = rand::thread_rng();
[INFO] [stdout]    |                         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:30:10
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let (mut center_re, mut center_im, mut zoom);
[INFO] [stdout]    |          ----^^^^^^^^^
[INFO] [stdout]    |          |
[INFO] [stdout]    |          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:30:25
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let (mut center_re, mut center_im, mut zoom);
[INFO] [stdout]    |                         ----^^^^^^^^^
[INFO] [stdout]    |                         |
[INFO] [stdout]    |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:30:40
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let (mut center_re, mut center_im, mut zoom);
[INFO] [stdout]    |                                        ----^^^^
[INFO] [stdout]    |                                        |
[INFO] [stdout]    |                                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "8fcda9cc39e3d00b9e6434607690afb5eefa1c86371fefa8c7be90f817e3f07c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fcda9cc39e3d00b9e6434607690afb5eefa1c86371fefa8c7be90f817e3f07c", kill_on_drop: false }`
[INFO] [stdout] 8fcda9cc39e3d00b9e6434607690afb5eefa1c86371fefa8c7be90f817e3f07c
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ca3adf6e373a5cd0338e4b29d036638d74c39440f45b094a9bdad6e73b40dbd6
[INFO] running `Command { std: "docker" "start" "-a" "ca3adf6e373a5cd0338e4b29d036638d74c39440f45b094a9bdad6e73b40dbd6", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated function `rand::thread_rng`: renamed to `rng`
[INFO] [stderr]   --> src/main.rs:26:25
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let mut rng = rand::thread_rng();
[INFO] [stderr]    |                         ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:30:10
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let (mut center_re, mut center_im, mut zoom);
[INFO] [stderr]    |          ----^^^^^^^^^
[INFO] [stderr]    |          |
[INFO] [stderr]    |          help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:30:25
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let (mut center_re, mut center_im, mut zoom);
[INFO] [stderr]    |                         ----^^^^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:30:40
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let (mut center_re, mut center_im, mut zoom);
[INFO] [stderr]    |                                        ----^^^^
[INFO] [stderr]    |                                        |
[INFO] [stderr]    |                                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: `mandelbrot` (bin "mandelbrot" test) generated 4 warnings (run `cargo fix --bin "mandelbrot" -p mandelbrot --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/mandelbrot-11324a7f37f3732c)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ca3adf6e373a5cd0338e4b29d036638d74c39440f45b094a9bdad6e73b40dbd6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca3adf6e373a5cd0338e4b29d036638d74c39440f45b094a9bdad6e73b40dbd6", kill_on_drop: false }`
[INFO] [stdout] ca3adf6e373a5cd0338e4b29d036638d74c39440f45b094a9bdad6e73b40dbd6
