[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/beta-1.38-1/sources/1.37.0/gh/theatlasroom/rust-learning"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/theatlasroom/rust-learning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/theatlasroom/rust-learning" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/theatlasroom/rust-learning"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of theatlasroom/rust-learning on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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/beta-1.38-1/sources/1.37.0/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/beta-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing theatlasroom/rust-learning against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 3706b31c4c346a2e5bbd9b2bcfccbee4ba418d82864ab1be244bfc45881acda9
[INFO] running `"docker" "start" "-a" "3706b31c4c346a2e5bbd9b2bcfccbee4ba418d82864ab1be244bfc45881acda9"`
[INFO] [stderr]    Compiling 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] 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] 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] 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] 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] 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] 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] 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: Could not compile `learning`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3706b31c4c346a2e5bbd9b2bcfccbee4ba418d82864ab1be244bfc45881acda9"`
[INFO] running `"docker" "rm" "-f" "3706b31c4c346a2e5bbd9b2bcfccbee4ba418d82864ab1be244bfc45881acda9"`
[INFO] [stdout] 3706b31c4c346a2e5bbd9b2bcfccbee4ba418d82864ab1be244bfc45881acda9