[INFO] cloning repository https://github.com/asgerius/qoi
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/asgerius/qoi" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fasgerius%2Fqoi", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fasgerius%2Fqoi'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0facda6c596597796b42b09fbf90e71f9e5b1ddd
[INFO] building asgerius/qoi against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fasgerius%2Fqoi" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/asgerius/qoi on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/asgerius/qoi
[INFO] finished tweaking git repo https://github.com/asgerius/qoi
[INFO] tweaked toml for git repo https://github.com/asgerius/qoi written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/asgerius/qoi 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e638e493ba45154622f797e8389eca62147efd1555e209e74f2f4409a04c7a73
[INFO] running `Command { std: "docker" "start" "-a" "e638e493ba45154622f797e8389eca62147efd1555e209e74f2f4409a04c7a73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e638e493ba45154622f797e8389eca62147efd1555e209e74f2f4409a04c7a73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e638e493ba45154622f797e8389eca62147efd1555e209e74f2f4409a04c7a73", kill_on_drop: false }`
[INFO] [stdout] e638e493ba45154622f797e8389eca62147efd1555e209e74f2f4409a04c7a73
[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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 615687a84738429aaa2513acd791ef46c6e1aa9806de119e5f575bc80a9cb2a1
[INFO] running `Command { std: "docker" "start" "-a" "615687a84738429aaa2513acd791ef46c6e1aa9806de119e5f575bc80a9cb2a1", kill_on_drop: false }`
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling miniz_oxide v0.6.2
[INFO] [stderr]    Compiling flate2 v1.0.25
[INFO] [stderr]    Compiling png v0.17.7
[INFO] [stderr]    Compiling qoi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::array`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::array;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `greyscale` should have an upper camel case name
[INFO] [stdout]  --> src/main.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | type greyscale = Vec<Vec<u8>>;
[INFO] [stdout]   |      ^^^^^^^^^ help: convert the identifier to upper camel case: `Greyscale`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `running` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let mut running: [Pixel; 64];
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_running` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     for i in 0..header.height {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `running` is never read
[INFO] [stdout]   --> src/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         running = [Pixel { r: 0, g: 0, b: 0, a: 255 }; 64];
[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: unused variable: `j`
[INFO] [stdout]   --> src/main.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |         for j in 0..header.width {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/main.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |             let index = hash(&pixel);
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `im`
[INFO] [stdout]   --> src/main.rs:38:35
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn encode_qoi(header: &QoiHeader, im: greyscale) {
[INFO] [stdout]    |                                   ^^ help: if this is intentional, prefix it with an underscore: `_im`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let mut pixel = Pixel { r: 0, g: 0, b: 0, a: 255 };
[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: variant `Four` is never constructed
[INFO] [stdout]  --> src/main.rs:8:28
[INFO] [stdout]   |
[INFO] [stdout] 8 | enum Channels { Three = 3, Four = 4 }
[INFO] [stdout]   |      --------              ^^^^
[INFO] [stdout]   |      |
[INFO] [stdout]   |      variant in this enum
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Zero` is never constructed
[INFO] [stdout]  --> src/main.rs:9:19
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum Colorspace { Zero = 0, One = 1 }
[INFO] [stdout]   |      ----------   ^^^^
[INFO] [stdout]   |      |
[INFO] [stdout]   |      variant in this enum
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `magic`, `channels`, and `colorspace` are never read
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct QoiHeader {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 12 |     magic: [u8; 4],
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     channels: Channels,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 16 |     colorspace: Colorspace,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.10s
[INFO] running `Command { std: "docker" "inspect" "615687a84738429aaa2513acd791ef46c6e1aa9806de119e5f575bc80a9cb2a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "615687a84738429aaa2513acd791ef46c6e1aa9806de119e5f575bc80a9cb2a1", kill_on_drop: false }`
[INFO] [stdout] 615687a84738429aaa2513acd791ef46c6e1aa9806de119e5f575bc80a9cb2a1
[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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b15655dc679cc977b83ed63d4abc78da087e90e102c1cd1ee2b95f12660660e0
[INFO] running `Command { std: "docker" "start" "-a" "b15655dc679cc977b83ed63d4abc78da087e90e102c1cd1ee2b95f12660660e0", kill_on_drop: false }`
[INFO] [stderr]    Compiling qoi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::array`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::array;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `greyscale` should have an upper camel case name
[INFO] [stdout]  --> src/main.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | type greyscale = Vec<Vec<u8>>;
[INFO] [stdout]   |      ^^^^^^^^^ help: convert the identifier to upper camel case: `Greyscale`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `running` is assigned to, but never used
[INFO] [stdout]   --> src/main.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let mut running: [Pixel; 64];
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_running` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/main.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     for i in 0..header.height {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `running` is never read
[INFO] [stdout]   --> src/main.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |         running = [Pixel { r: 0, g: 0, b: 0, a: 255 }; 64];
[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: unused variable: `j`
[INFO] [stdout]   --> src/main.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 |         for j in 0..header.width {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]   --> src/main.rs:44:17
[INFO] [stdout]    |
[INFO] [stdout] 44 |             let index = hash(&pixel);
[INFO] [stdout]    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `im`
[INFO] [stdout]   --> src/main.rs:38:35
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn encode_qoi(header: &QoiHeader, im: greyscale) {
[INFO] [stdout]    |                                   ^^ help: if this is intentional, prefix it with an underscore: `_im`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let mut pixel = Pixel { r: 0, g: 0, b: 0, a: 255 };
[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: variant `Four` is never constructed
[INFO] [stdout]  --> src/main.rs:8:28
[INFO] [stdout]   |
[INFO] [stdout] 8 | enum Channels { Three = 3, Four = 4 }
[INFO] [stdout]   |      --------              ^^^^
[INFO] [stdout]   |      |
[INFO] [stdout]   |      variant in this enum
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Zero` is never constructed
[INFO] [stdout]  --> src/main.rs:9:19
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum Colorspace { Zero = 0, One = 1 }
[INFO] [stdout]   |      ----------   ^^^^
[INFO] [stdout]   |      |
[INFO] [stdout]   |      variant in this enum
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `magic`, `channels`, and `colorspace` are never read
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct QoiHeader {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 12 |     magic: [u8; 4],
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |     channels: Channels,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 16 |     colorspace: Colorspace,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "b15655dc679cc977b83ed63d4abc78da087e90e102c1cd1ee2b95f12660660e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b15655dc679cc977b83ed63d4abc78da087e90e102c1cd1ee2b95f12660660e0", kill_on_drop: false }`
[INFO] [stdout] b15655dc679cc977b83ed63d4abc78da087e90e102c1cd1ee2b95f12660660e0