[INFO] cloning repository https://github.com/Pavel-chemist/polynomial-fit
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Pavel-chemist/polynomial-fit" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPavel-chemist%2Fpolynomial-fit", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPavel-chemist%2Fpolynomial-fit'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dccf7841f7fd4c1d6f824adcf30c3669f5d73485
[INFO] checking Pavel-chemist/polynomial-fit against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPavel-chemist%2Fpolynomial-fit" "/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/Pavel-chemist/polynomial-fit on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Pavel-chemist/polynomial-fit
[INFO] finished tweaking git repo https://github.com/Pavel-chemist/polynomial-fit
[INFO] tweaked toml for git repo https://github.com/Pavel-chemist/polynomial-fit written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Pavel-chemist/polynomial-fit 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a31ea1a49242a9fc342c16c2b03939c2334f3404125190fe37c76979c4fa4901
[INFO] running `Command { std: "docker" "start" "-a" "a31ea1a49242a9fc342c16c2b03939c2334f3404125190fe37c76979c4fa4901", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a31ea1a49242a9fc342c16c2b03939c2334f3404125190fe37c76979c4fa4901", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a31ea1a49242a9fc342c16c2b03939c2334f3404125190fe37c76979c4fa4901", kill_on_drop: false }`
[INFO] [stdout] a31ea1a49242a9fc342c16c2b03939c2334f3404125190fe37c76979c4fa4901
[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" "-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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 385aa454007ce12588b1b837da569ceb573e5aeaf957425ab1ec70dc78733b9c
[INFO] running `Command { std: "docker" "start" "-a" "385aa454007ce12588b1b837da569ceb573e5aeaf957425ab1ec70dc78733b9c", kill_on_drop: false }`
[INFO] [stderr]     Checking polynomial-fit v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `has_rows_swapped` is never read
[INFO] [stdout]    --> src/matrix.rs:247:13
[INFO] [stdout]     |
[INFO] [stdout] 247 |     let mut has_rows_swapped: bool = false;
[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: `sweep`
[INFO] [stdout]    --> src/matrix.rs:249:9
[INFO] [stdout]     |
[INFO] [stdout] 249 |     for sweep in 0..matrix.rows - 1 {
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_sweep`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `has_rows_swapped` is never read
[INFO] [stdout]    --> src/matrix.rs:247:13
[INFO] [stdout]     |
[INFO] [stdout] 247 |     let mut has_rows_swapped: bool = false;
[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: `sweep`
[INFO] [stdout]    --> src/matrix.rs:249:9
[INFO] [stdout]     |
[INFO] [stdout] 249 |     for sweep in 0..matrix.rows - 1 {
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_sweep`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `swap_columns`, `sum`, and `scalar_multiply` are never used
[INFO] [stdout]    --> src/matrix.rs:75:12
[INFO] [stdout]     |
[INFO] [stdout] 7   | impl Matrix {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 75  |     pub fn swap_columns(&mut self, column1: usize, column2: usize) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |     pub fn sum(addend1: &Matrix, addend2: &Matrix) -> Matrix {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |     pub fn scalar_multiply(matrix: &Matrix, multiplier: f64) -> Matrix {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `swap_columns`, `sum`, and `scalar_multiply` are never used
[INFO] [stdout]    --> src/matrix.rs:75:12
[INFO] [stdout]     |
[INFO] [stdout] 7   | impl Matrix {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 75  |     pub fn swap_columns(&mut self, column1: usize, column2: usize) {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 111 |     pub fn sum(addend1: &Matrix, addend2: &Matrix) -> Matrix {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 125 |     pub fn scalar_multiply(matrix: &Matrix, multiplier: f64) -> Matrix {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] running `Command { std: "docker" "inspect" "385aa454007ce12588b1b837da569ceb573e5aeaf957425ab1ec70dc78733b9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "385aa454007ce12588b1b837da569ceb573e5aeaf957425ab1ec70dc78733b9c", kill_on_drop: false }`
[INFO] [stdout] 385aa454007ce12588b1b837da569ceb573e5aeaf957425ab1ec70dc78733b9c