[INFO] updating cached repository theHooloovoo/Game_of_Life-Rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/theHooloovoo/Game_of_Life-Rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/theHooloovoo/Game_of_Life-Rust" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/theHooloovoo/Game_of_Life-Rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/theHooloovoo/Game_of_Life-Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/theHooloovoo/Game_of_Life-Rust" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/theHooloovoo/Game_of_Life-Rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/theHooloovoo/Game_of_Life-Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 959f41d6a578a988c02609bc41a57a9eb598910c
[INFO] sha for GitHub repo theHooloovoo/Game_of_Life-Rust: 959f41d6a578a988c02609bc41a57a9eb598910c
[INFO] validating manifest of theHooloovoo/Game_of_Life-Rust on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of theHooloovoo/Game_of_Life-Rust on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing theHooloovoo/Game_of_Life-Rust
[INFO] finished frobbing theHooloovoo/Game_of_Life-Rust
[INFO] frobbed toml for theHooloovoo/Game_of_Life-Rust written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/theHooloovoo/Game_of_Life-Rust/Cargo.toml
[INFO] started frobbing theHooloovoo/Game_of_Life-Rust
[INFO] finished frobbing theHooloovoo/Game_of_Life-Rust
[INFO] frobbed toml for theHooloovoo/Game_of_Life-Rust written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/theHooloovoo/Game_of_Life-Rust/Cargo.toml
[INFO] crate theHooloovoo/Game_of_Life-Rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking theHooloovoo/Game_of_Life-Rust against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-1/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/theHooloovoo/Game_of_Life-Rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] be6757d683d9c589f50f06486081554395f3e0b50daf9f132753cfbe2f722db4
[INFO] running `"docker" "start" "-a" "be6757d683d9c589f50f06486081554395f3e0b50daf9f132753cfbe2f722db4"`
[INFO] [stderr]     Checking conway_rs v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/reader.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/reader.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `arg_file_name` is never read
[INFO] [stderr]   --> src/main.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut arg_file_name = "".to_string();
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `main_grid` is never read
[INFO] [stderr]   --> src/main.rs:58:25
[INFO] [stderr]    |
[INFO] [stderr] 58 |             Ok(data) => main_grid = grid::Grid::load_from_file_data(data),
[INFO] [stderr]    |                         ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `cell_count` is never read
[INFO] [stderr]    --> src/grid.rs:107:17
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let mut cell_count = 0;
[INFO] [stderr]     |                 ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused comparison that must be used
[INFO] [stderr]    --> src/grid.rs:150:33
[INFO] [stderr]     |
[INFO] [stderr] 150 |         if self.state == true { self.state == false; }
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] warning: value assigned to `arg_file_name` is never read
[INFO] [stderr]   --> src/main.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut arg_file_name = "".to_string();
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused comparison that must be used
[INFO] [stderr]    --> src/grid.rs:151:33
[INFO] [stderr]     |
[INFO] [stderr] 151 |         else                  { self.state == true;  }
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `main_grid` is never read
[INFO] [stderr]   --> src/main.rs:58:25
[INFO] [stderr]    |
[INFO] [stderr] 58 |             Ok(data) => main_grid = grid::Grid::load_from_file_data(data),
[INFO] [stderr]    |                         ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `cell_count` is never read
[INFO] [stderr]    --> src/grid.rs:107:17
[INFO] [stderr]     |
[INFO] [stderr] 107 |         let mut cell_count = 0;
[INFO] [stderr]     |                 ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused comparison that must be used
[INFO] [stderr]    --> src/grid.rs:150:33
[INFO] [stderr]     |
[INFO] [stderr] 150 |         if self.state == true { self.state == false; }
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused comparison that must be used
[INFO] [stderr]    --> src/grid.rs:151:33
[INFO] [stderr]     |
[INFO] [stderr] 151 |         else                  { self.state == true;  }
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `"docker" "inspect" "be6757d683d9c589f50f06486081554395f3e0b50daf9f132753cfbe2f722db4"`
[INFO] running `"docker" "rm" "-f" "be6757d683d9c589f50f06486081554395f3e0b50daf9f132753cfbe2f722db4"`
[INFO] [stdout] be6757d683d9c589f50f06486081554395f3e0b50daf9f132753cfbe2f722db4