[INFO] cloning repository https://github.com/mznibe49/Spreadsheet-in-RUST
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mznibe49/Spreadsheet-in-RUST" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmznibe49%2FSpreadsheet-in-RUST", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmznibe49%2FSpreadsheet-in-RUST'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 81264842d574be884a536ea3b967f3f41e2f6d07
[INFO] checking mznibe49/Spreadsheet-in-RUST against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmznibe49%2FSpreadsheet-in-RUST" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mznibe49/Spreadsheet-in-RUST 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/mznibe49/Spreadsheet-in-RUST
[INFO] finished tweaking git repo https://github.com/mznibe49/Spreadsheet-in-RUST
[INFO] tweaked toml for git repo https://github.com/mznibe49/Spreadsheet-in-RUST written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mznibe49/Spreadsheet-in-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quote v1.0.3
[INFO] [stderr]   Downloaded unicode-xid v0.2.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.9
[INFO] [stderr]   Downloaded serde_derive v1.0.105
[INFO] [stderr]   Downloaded indexmap v1.3.2
[INFO] [stderr]   Downloaded serde v1.0.105
[INFO] [stderr]   Downloaded petgraph v0.5.0
[INFO] [stderr]   Downloaded syn v1.0.17
[INFO] [stderr]   Downloaded aho-corasick v0.7.10
[INFO] [stderr]   Downloaded regex-syntax v0.6.17
[INFO] [stderr]   Downloaded regex v1.3.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 4b07fa710184c509f412e42917c796d5dee831d9e6f3b999f5f20ed92e489a03
[INFO] running `Command { std: "docker" "start" "-a" "4b07fa710184c509f412e42917c796d5dee831d9e6f3b999f5f20ed92e489a03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b07fa710184c509f412e42917c796d5dee831d9e6f3b999f5f20ed92e489a03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b07fa710184c509f412e42917c796d5dee831d9e6f3b999f5f20ed92e489a03", kill_on_drop: false }`
[INFO] [stdout] 4b07fa710184c509f412e42917c796d5dee831d9e6f3b999f5f20ed92e489a03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 3dfe47ebe561c9111d0dacea546d158ab6f1e9d27bd1f9317febd66a25b9db8c
[INFO] running `Command { std: "docker" "start" "-a" "3dfe47ebe561c9111d0dacea546d158ab6f1e9d27bd1f9317febd66a25b9db8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stderr]    Compiling serde_derive v1.0.105
[INFO] [stderr]     Checking petgraph v0.5.0
[INFO] [stderr]     Checking defi2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/spreadsheet.rs:204:23
[INFO] [stdout]     |
[INFO] [stdout] 204 |             for (crd, mut cell) in self.evals.clone().iter() {
[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/spreadsheet.rs:239:21
[INFO] [stdout]     |
[INFO] [stdout] 239 |                 let mut child_cell = self.graph[child];
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/spreadsheet.rs:204:23
[INFO] [stdout]     |
[INFO] [stdout] 204 |             for (crd, mut cell) in self.evals.clone().iter() {
[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/spreadsheet.rs:239:21
[INFO] [stdout]     |
[INFO] [stdout] 239 |                 let mut child_cell = self.graph[child];
[INFO] [stdout]     |                     ----^^^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cycle`
[INFO] [stdout]    --> src/spreadsheet.rs:398:25
[INFO] [stdout]     |
[INFO] [stdout] 398 |             if let Some(cycle) = cell_to_update {
[INFO] [stdout]     |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_cycle`
[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/spreadsheet.rs:396:17
[INFO] [stdout]     |
[INFO] [stdout] 396 |             let mut cell_to_update = self.check_cycle(&mut cloned_graph);
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cycle`
[INFO] [stdout]    --> src/spreadsheet.rs:398:25
[INFO] [stdout]     |
[INFO] [stdout] 398 |             if let Some(cycle) = cell_to_update {
[INFO] [stdout]     |                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_cycle`
[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/spreadsheet.rs:396:17
[INFO] [stdout]     |
[INFO] [stdout] 396 |             let mut cell_to_update = self.check_cycle(&mut cloned_graph);
[INFO] [stdout]     |                 ----^^^^^^^^^^^^^^
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/rectangle.rs:34:10
[INFO] [stdout]    |
[INFO] [stdout] 34 |         (self.begin.row >= 0 && self.begin.col >= 0)
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/rectangle.rs:34:33
[INFO] [stdout]    |
[INFO] [stdout] 34 |         (self.begin.row >= 0 && self.begin.col >= 0)
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/rectangle.rs:34:10
[INFO] [stdout]    |
[INFO] [stdout] 34 |         (self.begin.row >= 0 && self.begin.col >= 0)
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_comparisons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison is useless due to type limits
[INFO] [stdout]   --> src/rectangle.rs:34:33
[INFO] [stdout]    |
[INFO] [stdout] 34 |         (self.begin.row >= 0 && self.begin.col >= 0)
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.86s
[INFO] running `Command { std: "docker" "inspect" "3dfe47ebe561c9111d0dacea546d158ab6f1e9d27bd1f9317febd66a25b9db8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3dfe47ebe561c9111d0dacea546d158ab6f1e9d27bd1f9317febd66a25b9db8c", kill_on_drop: false }`
[INFO] [stdout] 3dfe47ebe561c9111d0dacea546d158ab6f1e9d27bd1f9317febd66a25b9db8c