[INFO] cloning repository https://github.com/alessandrome/mandelbrot-sdl-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alessandrome/mandelbrot-sdl-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falessandrome%2Fmandelbrot-sdl-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falessandrome%2Fmandelbrot-sdl-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7a0b0c78668d278e8763dd6355882ff771b8d963
[INFO] building alessandrome/mandelbrot-sdl-rust 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%2Falessandrome%2Fmandelbrot-sdl-rust" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alessandrome/mandelbrot-sdl-rust 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/alessandrome/mandelbrot-sdl-rust
[INFO] finished tweaking git repo https://github.com/alessandrome/mandelbrot-sdl-rust
[INFO] tweaked toml for git repo https://github.com/alessandrome/mandelbrot-sdl-rust written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/alessandrome/mandelbrot-sdl-rust 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-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] a6cc633b6227720e0716e12348e6e221d58dffa61a2b4a5b1d1a8de82f7776dc
[INFO] running `Command { std: "docker" "start" "-a" "a6cc633b6227720e0716e12348e6e221d58dffa61a2b4a5b1d1a8de82f7776dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a6cc633b6227720e0716e12348e6e221d58dffa61a2b4a5b1d1a8de82f7776dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6cc633b6227720e0716e12348e6e221d58dffa61a2b4a5b1d1a8de82f7776dc", kill_on_drop: false }`
[INFO] [stdout] a6cc633b6227720e0716e12348e6e221d58dffa61a2b4a5b1d1a8de82f7776dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] ec7d19453fb4560ca010c47b16a06d7dc99afc5fd92bbadcc6d4a4407c44f78c
[INFO] running `Command { std: "docker" "start" "-a" "ec7d19453fb4560ca010c47b16a06d7dc99afc5fd92bbadcc6d4a4407c44f78c", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling version-compare v0.1.1
[INFO] [stderr]    Compiling sdl2 v0.37.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stderr]    Compiling sdl2-sys v0.37.0
[INFO] [stderr]    Compiling Mandelbrot-Fractal v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `max` and `min`
[INFO] [stdout]  --> src/main.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::cmp::{max, min};
[INFO] [stdout]   |                ^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/complex.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `C32`
[INFO] [stdout]   --> src/main.rs:12:24
[INFO] [stdout]    |
[INFO] [stdout] 12 | use complex::{Complex, C32};
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     for p in 0..points {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |             let mut mandelbrot_points = Arc::new(Mutex::new(Vec::with_capacity(WIDTH * HEIGHT)));
[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:126:21
[INFO] [stdout]     |
[INFO] [stdout] 126 |                 let mut mandelbrot_points_copy = mandelbrot_points.clone();
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `complex_value` is never read
[INFO] [stdout]   --> src/main.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 55 | struct MandelbrotSDLPoint {
[INFO] [stdout]    |        ------------------ field in this struct
[INFO] [stdout] 56 |     pub window_coord: (i32, i32),
[INFO] [stdout] 57 |     pub complex_value: Complex,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MandelbrotSDLPoint` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_real` is never used
[INFO] [stdout]   --> src/complex.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Complex {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn is_real(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static `Complex` is never used
[INFO] [stdout]   --> src/complex.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | static Complex: fn(f32, f32) -> Complex = Complex::new;
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `C32` is never used
[INFO] [stdout]   --> src/complex.rs:45:10
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub type C32 = Complex;
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `norm` and `abs` are never used
[INFO] [stdout]   --> src/complex/norm.rs:8:12
[INFO] [stdout]    |
[INFO] [stdout] 3  | impl Complex {
[INFO] [stdout]    | ------------ methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 8  |     pub fn norm(&self) -> f32 {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn abs(&self) -> f32 {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `Complex` should have an upper case name
[INFO] [stdout]   --> src/complex.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | static Complex: fn(f32, f32) -> Complex = Complex::new;
[INFO] [stdout]    |        ^^^^^^^ help: convert the identifier to upper case: `COMPLEX`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.53s
[INFO] running `Command { std: "docker" "inspect" "ec7d19453fb4560ca010c47b16a06d7dc99afc5fd92bbadcc6d4a4407c44f78c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec7d19453fb4560ca010c47b16a06d7dc99afc5fd92bbadcc6d4a4407c44f78c", kill_on_drop: false }`
[INFO] [stdout] ec7d19453fb4560ca010c47b16a06d7dc99afc5fd92bbadcc6d4a4407c44f78c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 12260df1332a677864ee641f3a3efb476feb77ed5a3008b73f02a99d3fc4bf37
[INFO] running `Command { std: "docker" "start" "-a" "12260df1332a677864ee641f3a3efb476feb77ed5a3008b73f02a99d3fc4bf37", kill_on_drop: false }`
[INFO] [stderr]    Compiling Mandelbrot-Fractal v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `max` and `min`
[INFO] [stdout]  --> src/main.rs:3:16
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::cmp::{max, min};
[INFO] [stdout]   |                ^^^  ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]   --> src/complex/div.rs:37:32
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let expected_divisor = (a2 * a2 + b2 * b2);
[INFO] [stdout]    |                                ^                 ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 37 -         let expected_divisor = (a2 * a2 + b2 * b2);
[INFO] [stdout] 37 +         let expected_divisor = a2 * a2 + b2 * b2;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/complex.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `C32`
[INFO] [stdout]   --> src/main.rs:12:24
[INFO] [stdout]    |
[INFO] [stdout] 12 | use complex::{Complex, C32};
[INFO] [stdout]    |                        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     for p in 0..points {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:116:17
[INFO] [stdout]     |
[INFO] [stdout] 116 |             let mut mandelbrot_points = Arc::new(Mutex::new(Vec::with_capacity(WIDTH * HEIGHT)));
[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:126:21
[INFO] [stdout]     |
[INFO] [stdout] 126 |                 let mut mandelbrot_points_copy = mandelbrot_points.clone();
[INFO] [stdout]     |                     ----^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `complex_value` is never read
[INFO] [stdout]   --> src/main.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 55 | struct MandelbrotSDLPoint {
[INFO] [stdout]    |        ------------------ field in this struct
[INFO] [stdout] 56 |     pub window_coord: (i32, i32),
[INFO] [stdout] 57 |     pub complex_value: Complex,
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MandelbrotSDLPoint` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_real` is never used
[INFO] [stdout]   --> src/complex.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Complex {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 22 |     pub fn is_real(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `C32` is never used
[INFO] [stdout]   --> src/complex.rs:45:10
[INFO] [stdout]    |
[INFO] [stdout] 45 | pub type C32 = Complex;
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `abs` is never used
[INFO] [stdout]   --> src/complex/norm.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 3  | impl Complex {
[INFO] [stdout]    | ------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     pub fn abs(&self) -> f32 {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: static variable `Complex` should have an upper case name
[INFO] [stdout]   --> src/complex.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | static Complex: fn(f32, f32) -> Complex = Complex::new;
[INFO] [stdout]    |        ^^^^^^^ help: convert the identifier to upper case: `COMPLEX`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "12260df1332a677864ee641f3a3efb476feb77ed5a3008b73f02a99d3fc4bf37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12260df1332a677864ee641f3a3efb476feb77ed5a3008b73f02a99d3fc4bf37", kill_on_drop: false }`
[INFO] [stdout] 12260df1332a677864ee641f3a3efb476feb77ed5a3008b73f02a99d3fc4bf37