[INFO] updating cached repository theatlasroom/rust-learning
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/theatlasroom/rust-learning
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/theatlasroom/rust-learning" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/theatlasroom/rust-learning"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/theatlasroom/rust-learning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/theatlasroom/rust-learning" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/theatlasroom/rust-learning"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/theatlasroom/rust-learning'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7d4a390a3ace3085dbcc821e2fb7899f7a668a1c
[INFO] sha for GitHub repo theatlasroom/rust-learning: 7d4a390a3ace3085dbcc821e2fb7899f7a668a1c
[INFO] validating manifest of theatlasroom/rust-learning on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of theatlasroom/rust-learning on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing theatlasroom/rust-learning
[INFO] finished frobbing theatlasroom/rust-learning
[INFO] frobbed toml for theatlasroom/rust-learning written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/theatlasroom/rust-learning/Cargo.toml
[INFO] started frobbing theatlasroom/rust-learning
[INFO] finished frobbing theatlasroom/rust-learning
[INFO] frobbed toml for theatlasroom/rust-learning written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/theatlasroom/rust-learning/Cargo.toml
[INFO] crate theatlasroom/rust-learning already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking theatlasroom/rust-learning against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-3/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/theatlasroom/rust-learning:/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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 8ad821cfb7b2c70e71c775c977d111bd17bd90a4a148665b7ff517b400eef9b3
[INFO] running `"docker" "start" "-a" "8ad821cfb7b2c70e71c775c977d111bd17bd90a4a148665b7ff517b400eef9b3"`
[INFO] [stderr]     Checking learning v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0530]: match bindings cannot shadow tuple variants
[INFO] [stderr]   --> src/bin/file_io.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |         Err => println!("Error\n{:?}", handle),
[INFO] [stderr]    |         ^^^ cannot be named the same as a tuple variant
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `handle` in this scope
[INFO] [stderr]   --> src/bin/file_io.rs:28:40
[INFO] [stderr]    |
[INFO] [stderr] 28 |         Err => println!("Error\n{:?}", handle),
[INFO] [stderr]    |                                        ^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `dice_roll` is never read
[INFO] [stderr]   --> src/bin/dice_roll.rs:48:13
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut dice_roll = 0;
[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] error[E0308]: mismatched types
[INFO] [stderr]   --> src/bin/file_io.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let mut handle = match fs::File::open(f){
[INFO] [stderr]    |                            ----------------- this match expression has type `std::result::Result<std::fs::File, std::io::Error>`
[INFO] [stderr] 27 |         Some(handle) => println!("File\n{:?}", handle),
[INFO] [stderr]    |         ^^^^^^^^^^^^ expected enum `std::result::Result`, found enum `std::option::Option`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::result::Result<std::fs::File, std::io::Error>`
[INFO] [stderr]               found type `std::option::Option<_>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0308, E0425, E0530.
[INFO] [stderr] For more information about an error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `learning`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: method is never used: `divide`
[INFO] [stderr]   --> src/bin/matrix_math.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn divide(&self, scalar: f64) -> Matrix2d {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `multiply`
[INFO] [stderr]   --> src/bin/matrix_math.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn multiply(&self, scalar: f64) -> Matrix2d {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `scalar_multiply`
[INFO] [stderr]   --> src/bin/matrix_math.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn scalar_multiply(&self) -> f64 { unimplemented!() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `determinant`
[INFO] [stderr]   --> src/bin/matrix_math.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn determinant(&self) -> f64 { unimplemented!() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `divide`
[INFO] [stderr]   --> src/bin/matrix_math.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn divide(&self, scalar: f64) -> Matrix2d {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `multiply`
[INFO] [stderr]   --> src/bin/matrix_math.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn multiply(&self, scalar: f64) -> Matrix2d {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `scalar_multiply`
[INFO] [stderr]   --> src/bin/matrix_math.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn scalar_multiply(&self) -> f64 { unimplemented!() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `determinant`
[INFO] [stderr]   --> src/bin/matrix_math.rs:44:5
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn determinant(&self) -> f64 { unimplemented!() }
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "8ad821cfb7b2c70e71c775c977d111bd17bd90a4a148665b7ff517b400eef9b3"`
[INFO] running `"docker" "rm" "-f" "8ad821cfb7b2c70e71c775c977d111bd17bd90a4a148665b7ff517b400eef9b3"`
[INFO] [stdout] 8ad821cfb7b2c70e71c775c977d111bd17bd90a4a148665b7ff517b400eef9b3