[INFO] cloning repository https://github.com/theatlasroom/rust-learning
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/theatlasroom/rust-learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheatlasroom%2Frust-learning", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheatlasroom%2Frust-learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d4a390a3ace3085dbcc821e2fb7899f7a668a1c
[INFO] checking theatlasroom/rust-learning against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheatlasroom%2Frust-learning" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/theatlasroom/rust-learning on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/theatlasroom/rust-learning
[INFO] finished tweaking git repo https://github.com/theatlasroom/rust-learning
[INFO] tweaked toml for git repo https://github.com/theatlasroom/rust-learning written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/theatlasroom/rust-learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f4440e1889b7205d469a3bb2fc838b5f12d941412c51ec23d29049e9a79bf0a7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f4440e1889b7205d469a3bb2fc838b5f12d941412c51ec23d29049e9a79bf0a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4440e1889b7205d469a3bb2fc838b5f12d941412c51ec23d29049e9a79bf0a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4440e1889b7205d469a3bb2fc838b5f12d941412c51ec23d29049e9a79bf0a7", kill_on_drop: false }`
[INFO] [stdout] f4440e1889b7205d469a3bb2fc838b5f12d941412c51ec23d29049e9a79bf0a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0bb559f68966ddcaf10612465e0f3907f71c1c95b7729028e462df4132c2759e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0bb559f68966ddcaf10612465e0f3907f71c1c95b7729028e462df4132c2759e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0601]: `main` function not found in crate `text_in_input`
[INFO] [stdout]   |
[INFO] [stdout]   = note: consider adding a `main` function to `src/bin/text_in_input.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] error[E0530]: match bindings cannot shadow tuple variants
[INFO] [stdout]   --> src/bin/file_io.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         Err => println!("Error\n{:?}", handle),
[INFO] [stdout]    |         ^^^ cannot be named the same as a tuple variant
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0530]: match bindings cannot shadow tuple variants
[INFO] [stdout]   --> src/bin/file_io.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |         Err => println!("Error\n{:?}", handle),
[INFO] [stdout]    |         ^^^ cannot be named the same as a tuple variant
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learning`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0425]: cannot find value `handle` in this scope
[INFO] [stdout]   --> src/bin/file_io.rs:28:40
[INFO] [stdout]    |
[INFO] [stdout] 28 |         Err => println!("Error\n{:?}", handle),
[INFO] [stdout]    |                                        ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `handle` in this scope
[INFO] [stdout]   --> src/bin/file_io.rs:28:40
[INFO] [stdout]    |
[INFO] [stdout] 28 |         Err => println!("Error\n{:?}", handle),
[INFO] [stdout]    |                                        ^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `divide`
[INFO] [stdout]   --> src/bin/matrix_math.rs:35:8
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn divide(&self, scalar: f64) -> Matrix2d {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `multiply`
[INFO] [stdout]   --> src/bin/matrix_math.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 |     fn multiply(&self, scalar: f64) -> Matrix2d {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `scalar_multiply`
[INFO] [stdout]   --> src/bin/matrix_math.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 |     fn scalar_multiply(&self) -> f64 { unimplemented!() }
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `determinant`
[INFO] [stdout]   --> src/bin/matrix_math.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 44 |     fn determinant(&self) -> f64 { unimplemented!() }
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `dice_roll` is never read
[INFO] [stdout]   --> src/bin/dice_roll.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let mut dice_roll = 0;
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/file_io.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mut handle = match fs::File::open(f){
[INFO] [stdout]    |                            ----------------- this expression has type `std::result::Result<File, std::io::Error>`
[INFO] [stdout] 27 |         Some(handle) => println!("File\n{:?}", handle),
[INFO] [stdout]    |         ^^^^^^^^^^^^ expected enum `std::result::Result`, found enum `Option`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected enum `std::result::Result<File, std::io::Error>`
[INFO] [stdout]               found enum `Option<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0425, E0530.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/file_io.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let mut handle = match fs::File::open(f){
[INFO] [stdout]    |                            ----------------- this expression has type `std::result::Result<File, std::io::Error>`
[INFO] [stdout] 27 |         Some(handle) => println!("File\n{:?}", handle),
[INFO] [stdout]    |         ^^^^^^^^^^^^ expected enum `std::result::Result`, found enum `Option`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected enum `std::result::Result<File, std::io::Error>`
[INFO] [stdout]               found enum `Option<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0425, E0530.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0bb559f68966ddcaf10612465e0f3907f71c1c95b7729028e462df4132c2759e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0bb559f68966ddcaf10612465e0f3907f71c1c95b7729028e462df4132c2759e", kill_on_drop: false }`
[INFO] [stdout] 0bb559f68966ddcaf10612465e0f3907f71c1c95b7729028e462df4132c2759e