[INFO] cloning repository https://github.com/svanellewee/rust-sdl-hackery
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/svanellewee/rust-sdl-hackery" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsvanellewee%2Frust-sdl-hackery", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsvanellewee%2Frust-sdl-hackery'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] cc8d754d7ab62c228e6acb29e758678a0714e091
[INFO] checking svanellewee/rust-sdl-hackery against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsvanellewee%2Frust-sdl-hackery" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/svanellewee/rust-sdl-hackery on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/svanellewee/rust-sdl-hackery
[INFO] finished tweaking git repo https://github.com/svanellewee/rust-sdl-hackery
[INFO] tweaked toml for git repo https://github.com/svanellewee/rust-sdl-hackery written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/svanellewee/rust-sdl-hackery 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cfg-if v0.1.2
[INFO] [stderr]   Downloaded bitflags v1.0.1
[INFO] [stderr]   Downloaded rand v0.3.22
[INFO] [stderr]   Downloaded bitflags v0.7.0
[INFO] [stderr]   Downloaded num-integer v0.1.36
[INFO] [stderr]   Downloaded num-iter v0.1.35
[INFO] [stderr]   Downloaded num v0.1.42
[INFO] [stderr]   Downloaded num-traits v0.2.2
[INFO] [stderr]   Downloaded rand v0.4.2
[INFO] [stderr]   Downloaded sdl2 v0.31.0
[INFO] [stderr]   Downloaded libc v0.2.40
[INFO] [stderr]   Downloaded sdl2-sys v0.31.0
[INFO] [stderr]   Downloaded winapi v0.3.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f2d5b8df1aea861613fac6eec99a52222e46264539c959811e8062c03aa6f13f
[INFO] running `Command { std: "docker" "start" "-a" "f2d5b8df1aea861613fac6eec99a52222e46264539c959811e8062c03aa6f13f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2d5b8df1aea861613fac6eec99a52222e46264539c959811e8062c03aa6f13f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2d5b8df1aea861613fac6eec99a52222e46264539c959811e8062c03aa6f13f", kill_on_drop: false }`
[INFO] [stdout] f2d5b8df1aea861613fac6eec99a52222e46264539c959811e8062c03aa6f13f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51f90019af3e6f72a4f5ea5ce7e8b0484342e27f2d2a16b60d55a14bd5569440
[INFO] running `Command { std: "docker" "start" "-a" "51f90019af3e6f72a4f5ea5ce7e8b0484342e27f2d2a16b60d55a14bd5569440", kill_on_drop: false }`
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]     Checking libc v0.2.40
[INFO] [stderr]     Checking lazy_static v0.2.11
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]    Compiling sdl2-sys v0.31.0
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking num-integer v0.1.36
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking sdl2 v0.31.0
[INFO] [stderr]     Checking sdl2-tut v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let mut canvas = window
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let mut canvas = window
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         canvas.fill_rect(dest_rect_0);
[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] 88 |         let _ = canvas.fill_rect(dest_rect_0);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |         canvas.fill_rect(dest_rect_0);
[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] 88 |         let _ = canvas.fill_rect(dest_rect_0);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.47s
[INFO] running `Command { std: "docker" "inspect" "51f90019af3e6f72a4f5ea5ce7e8b0484342e27f2d2a16b60d55a14bd5569440", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51f90019af3e6f72a4f5ea5ce7e8b0484342e27f2d2a16b60d55a14bd5569440", kill_on_drop: false }`
[INFO] [stdout] 51f90019af3e6f72a4f5ea5ce7e8b0484342e27f2d2a16b60d55a14bd5569440