[INFO] cloning repository https://github.com/VesaIhanainen/palette_generator [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VesaIhanainen/palette_generator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVesaIhanainen%2Fpalette_generator", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVesaIhanainen%2Fpalette_generator'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] a09a8df22185a9a66d5a3e7c034d1335a668b40e [INFO] checking VesaIhanainen/palette_generator against master#8424f8e8cdf07010967a57584fd647b30e930d4d for pr-120095 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVesaIhanainen%2Fpalette_generator" "/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/VesaIhanainen/palette_generator on toolchain 8424f8e8cdf07010967a57584fd647b30e930d4d [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/VesaIhanainen/palette_generator [INFO] finished tweaking git repo https://github.com/VesaIhanainen/palette_generator [INFO] tweaked toml for git repo https://github.com/VesaIhanainen/palette_generator written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/VesaIhanainen/palette_generator 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" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "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 VesaIhanainen/palette_generator against try#047472f299946caf090d1b5608ae4bd9f0416256+rustflags=-Ddereferencing_mut_binding for pr-120095 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVesaIhanainen%2Fpalette_generator" "/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/VesaIhanainen/palette_generator on toolchain 047472f299946caf090d1b5608ae4bd9f0416256 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/VesaIhanainen/palette_generator [INFO] finished tweaking git repo https://github.com/VesaIhanainen/palette_generator [INFO] tweaked toml for git repo https://github.com/VesaIhanainen/palette_generator written to /workspace/builds/worker-7-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/VesaIhanainen/palette_generator 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" "+047472f299946caf090d1b5608ae4bd9f0416256" "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] [stderr] Downloading crates ... [INFO] [stderr] Downloaded rayon-core v1.8.0 [INFO] [stderr] Downloaded image v0.23.9 [INFO] [stderr] Downloaded kdtree v0.5.1 [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" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 88f6a9587bee840b2a9f13aaa190ce88a573c08bc121d51bcbcaedcf7af4830c [INFO] running `Command { std: "docker" "start" "-a" "88f6a9587bee840b2a9f13aaa190ce88a573c08bc121d51bcbcaedcf7af4830c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "88f6a9587bee840b2a9f13aaa190ce88a573c08bc121d51bcbcaedcf7af4830c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "88f6a9587bee840b2a9f13aaa190ce88a573c08bc121d51bcbcaedcf7af4830c", kill_on_drop: false }` [INFO] [stdout] 88f6a9587bee840b2a9f13aaa190ce88a573c08bc121d51bcbcaedcf7af4830c [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 -Ddereferencing_mut_binding" "-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" "+047472f299946caf090d1b5608ae4bd9f0416256" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 9b3e4f57f4a34468aa4dd29f272b1074a0301a4cd043de9c99d0de0b3cc52160 [INFO] running `Command { std: "docker" "start" "-a" "9b3e4f57f4a34468aa4dd29f272b1074a0301a4cd043de9c99d0de0b3cc52160", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v1.0.1 [INFO] [stderr] Checking cfg-if v0.1.10 [INFO] [stderr] Compiling libc v0.2.77 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Checking lazy_static v1.4.0 [INFO] [stderr] Compiling byteorder v1.3.4 [INFO] [stderr] Compiling rayon-core v1.8.0 [INFO] [stderr] Checking scopeguard v1.1.0 [INFO] [stderr] Compiling getrandom v0.1.15 [INFO] [stderr] Checking adler32 v1.2.0 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Compiling crc32fast v1.2.0 [INFO] [stderr] Checking lzw v0.10.0 [INFO] [stderr] Checking either v1.6.0 [INFO] [stderr] Checking color_quant v1.0.1 [INFO] [stderr] Checking ppv-lite86 v0.2.9 [INFO] [stderr] Checking bytemuck v1.4.1 [INFO] [stderr] Checking scoped_threadpool v0.1.9 [INFO] [stderr] Checking miniz_oxide v0.3.7 [INFO] [stderr] Checking gif v0.10.3 [INFO] [stderr] Compiling crossbeam-utils v0.7.2 [INFO] [stderr] Compiling memoffset v0.5.5 [INFO] [stderr] Compiling crossbeam-epoch v0.8.2 [INFO] [stderr] Compiling num-traits v0.2.12 [INFO] [stderr] Compiling num-integer v0.1.43 [INFO] [stderr] Compiling rayon v1.4.0 [INFO] [stderr] Compiling num-rational v0.3.0 [INFO] [stderr] Compiling num-iter v0.1.41 [INFO] [stderr] Checking deflate v0.8.6 [INFO] [stderr] Checking tiff v0.5.0 [INFO] [stderr] Checking png v0.16.7 [INFO] [stderr] Checking crossbeam-channel v0.4.4 [INFO] [stderr] Checking num_cpus v1.13.0 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking kdtree v0.5.1 [INFO] [stderr] Checking crossbeam-deque v0.7.3 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Checking jpeg-decoder v0.1.20 [INFO] [stderr] Checking image v0.23.9 [INFO] [stderr] Checking palette_generator v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:38:5 [INFO] [stdout] | [INFO] [stdout] 38 | resulting_image.save(image_name); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 38 | let _ = resulting_image.save(image_name); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:38:5 [INFO] [stdout] | [INFO] [stdout] 38 | resulting_image.save(image_name); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 38 | let _ = resulting_image.save(image_name); [INFO] [stdout] | +++++++ [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 9.31s [INFO] running `Command { std: "docker" "inspect" "9b3e4f57f4a34468aa4dd29f272b1074a0301a4cd043de9c99d0de0b3cc52160", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "9b3e4f57f4a34468aa4dd29f272b1074a0301a4cd043de9c99d0de0b3cc52160", kill_on_drop: false }` [INFO] [stdout] 9b3e4f57f4a34468aa4dd29f272b1074a0301a4cd043de9c99d0de0b3cc52160