[INFO] cloning repository https://github.com/theatlasroom/rust-learning
[INFO] running `"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"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheatlasroom%2Frust-learning'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7d4a390a3ace3085dbcc821e2fb7899f7a668a1c
[INFO] testing theatlasroom/rust-learning against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheatlasroom%2Frust-learning" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/theatlasroom/rust-learning on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-0/source/Cargo.toml
[INFO] crate git repo https://github.com/theatlasroom/rust-learning already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4567fe221bc100135ca8363030fa37fef6d19fe03d634d8d28c223269eb760f7
[INFO] running `"docker" "start" "-a" "4567fe221bc100135ca8363030fa37fef6d19fe03d634d8d28c223269eb760f7"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.20
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: format argument must be a string literal
[INFO] [stderr]  --> src/bin/primitives.rs:3:14
[INFO] [stderr]   |
[INFO] [stderr] 3 |     println!('\u{0024}');
[INFO] [stderr]   |              ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] help: you might be missing a string literal to format with
[INFO] [stderr]   |
[INFO] [stderr] 3 |     println!("{}", '\u{0024}');
[INFO] [stderr]   |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: format argument must be a string literal
[INFO] [stderr]  --> src/bin/primitives.rs:4:14
[INFO] [stderr]   |
[INFO] [stderr] 4 |     println!('\u{00A5}');
[INFO] [stderr]   |              ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] help: you might be missing a string literal to format with
[INFO] [stderr]   |
[INFO] [stderr] 4 |     println!("{}", '\u{00A5}');
[INFO] [stderr]   |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: format argument must be a string literal
[INFO] [stderr]  --> src/bin/primitives.rs:5:14
[INFO] [stderr]   |
[INFO] [stderr] 5 |     println!('\u{26A1}');
[INFO] [stderr]   |              ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] help: you might be missing a string literal to format with
[INFO] [stderr]   |
[INFO] [stderr] 5 |     println!("{}", '\u{26A1}');
[INFO] [stderr]   |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: format argument must be a string literal
[INFO] [stderr]  --> src/bin/primitives.rs:6:14
[INFO] [stderr]   |
[INFO] [stderr] 6 |     println!('\u{2600}');
[INFO] [stderr]   |              ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] help: you might be missing a string literal to format with
[INFO] [stderr]   |
[INFO] [stderr] 6 |     println!("{}", '\u{2600}');
[INFO] [stderr]   |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: format argument must be a string literal
[INFO] [stderr]  --> src/bin/primitives.rs:7:14
[INFO] [stderr]   |
[INFO] [stderr] 7 |     println!('\u{99}');
[INFO] [stderr]   |              ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr] help: you might be missing a string literal to format with
[INFO] [stderr]   |
[INFO] [stderr] 7 |     println!("{}", '\u{99}');
[INFO] [stderr]   |              ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `text_in_input`
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider adding a `main` function to `src/bin/text_in_input.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[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] [stderr] error[E0601]: `main` function not found in crate `text_in_file`
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider adding a `main` function to `src/bin/text_in_file.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] warning: value assigned to `dice_roll` is never read
[INFO] [stderr]   --> src/bin/dice_roll.rs:48:9
[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[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: associated function is never used: `divide`
[INFO] [stderr]   --> src/bin/matrix_math.rs:35:8
[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: associated function is never used: `multiply`
[INFO] [stderr]   --> src/bin/matrix_math.rs:39:8
[INFO] [stderr]    |
[INFO] [stderr] 39 |     fn multiply(&self, scalar: f64) -> Matrix2d {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `scalar_multiply`
[INFO] [stderr]   --> src/bin/matrix_math.rs:43:8
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn scalar_multiply(&self) -> f64 { unimplemented!() }
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `determinant`
[INFO] [stderr]   --> src/bin/matrix_math.rs:44:8
[INFO] [stderr]    |
[INFO] [stderr] 44 |     fn determinant(&self) -> f64 { unimplemented!() }
[INFO] [stderr]    |        ^^^^^^^^^^^
[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 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 enum `std::result::Result<std::fs::File, std::io::Error>`
[INFO] [stderr]               found enum `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] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "4567fe221bc100135ca8363030fa37fef6d19fe03d634d8d28c223269eb760f7"`
[INFO] running `"docker" "rm" "-f" "4567fe221bc100135ca8363030fa37fef6d19fe03d634d8d28c223269eb760f7"`
[INFO] [stdout] 4567fe221bc100135ca8363030fa37fef6d19fe03d634d8d28c223269eb760f7