[INFO] updating cached repository caporta/rust_fundamentals
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/caporta/rust_fundamentals
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/caporta/rust_fundamentals" "work/ex/beta-1.37-6/sources/1.36.0/gh/caporta/rust_fundamentals"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/caporta/rust_fundamentals'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/caporta/rust_fundamentals" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/caporta/rust_fundamentals"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/caporta/rust_fundamentals'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 78a5378e3b3c9e32237f5f6bcc8083bd250e7b8d
[INFO] sha for GitHub repo caporta/rust_fundamentals: 78a5378e3b3c9e32237f5f6bcc8083bd250e7b8d
[INFO] validating manifest of caporta/rust_fundamentals on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of caporta/rust_fundamentals on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing caporta/rust_fundamentals
[INFO] finished frobbing caporta/rust_fundamentals
[INFO] frobbed toml for caporta/rust_fundamentals written to work/ex/beta-1.37-6/sources/1.36.0/gh/caporta/rust_fundamentals/Cargo.toml
[INFO] started frobbing caporta/rust_fundamentals
[INFO] finished frobbing caporta/rust_fundamentals
[INFO] frobbed toml for caporta/rust_fundamentals written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/caporta/rust_fundamentals/Cargo.toml
[INFO] crate caporta/rust_fundamentals already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing caporta/rust_fundamentals against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/caporta/rust_fundamentals:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 093097e0e7ae291deba639a39d461c9f0aaf983d8d1733e0e0ffce9cd89bbaab
[INFO] running `"docker" "start" "-a" "093097e0e7ae291deba639a39d461c9f0aaf983d8d1733e0e0ffce9cd89bbaab"`
[INFO] [stderr]    Compiling hello_world v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unknown lint: `unused_variable`
[INFO] [stderr]  --> src/stack_and_heap.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[allow(unused_variable)]
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^ help: did you mean: `unused_variables`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unknown_lints)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/stack_and_heap.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let x = 5; // i32 stored on the stack
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/data_structures_2.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |     let u:&str = &letters; // d-ref conversions
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]  --> src/pattern_matching.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |         z @ 9...11 => "lots of", //assign range to variable
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `myLine`
[INFO] [stderr]   --> src/generics.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let myLine = Line { start: a, end: b };
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_myLine`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `y`
[INFO] [stderr]  --> src/stack_and_heap.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     y: f64
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Red`
[INFO] [stderr]   --> src/data_structures_1.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     Red, // "memberless struct"
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Green`
[INFO] [stderr]   --> src/data_structures_1.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     Green, // "memberless struct"
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Blue`
[INFO] [stderr]   --> src/data_structures_1.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     Blue, // etc...
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RGBColor`
[INFO] [stderr]   --> src/data_structures_1.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     RGBColor(u8, u8, u8), // tuple
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cyan`
[INFO] [stderr]   --> src/data_structures_1.rs:32:15
[INFO] [stderr]    |
[INFO] [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
[INFO] [stderr]    |               ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `magenta`
[INFO] [stderr]   --> src/data_structures_1.rs:32:24
[INFO] [stderr]    |
[INFO] [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
[INFO] [stderr]    |                        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `yellow`
[INFO] [stderr]   --> src/data_structures_1.rs:32:36
[INFO] [stderr]    |
[INFO] [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
[INFO] [stderr]    |                                    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `start`
[INFO] [stderr]  --> src/generics.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     start: Point<T>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `end`
[INFO] [stderr]  --> src/generics.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     end: Point<T>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `myLine` should have a snake case name
[INFO] [stderr]   --> src/data_structures_1.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let myLine = Line { start: p, end: p2 };
[INFO] [stderr]    |         ^^^^^^ help: convert the identifier to snake case: `my_line`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `myLine` should have a snake case name
[INFO] [stderr]   --> src/generics.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let myLine = Line { start: a, end: b };
[INFO] [stderr]    |         ^^^^^^ help: convert the identifier to snake case: `my_line`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `"docker" "inspect" "093097e0e7ae291deba639a39d461c9f0aaf983d8d1733e0e0ffce9cd89bbaab"`
[INFO] running `"docker" "rm" "-f" "093097e0e7ae291deba639a39d461c9f0aaf983d8d1733e0e0ffce9cd89bbaab"`
[INFO] [stdout] 093097e0e7ae291deba639a39d461c9f0aaf983d8d1733e0e0ffce9cd89bbaab
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/caporta/rust_fundamentals:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1aae82bf8b95ea95fc38b8bd8994962cd40dcf8565fedf17d9b267982d1d04dd
[INFO] running `"docker" "start" "-a" "1aae82bf8b95ea95fc38b8bd8994962cd40dcf8565fedf17d9b267982d1d04dd"`
[INFO] [stderr]    Compiling hello_world v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unknown lint: `unused_variable`
[INFO] [stderr]  --> src/stack_and_heap.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[allow(unused_variable)]
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^ help: did you mean: `unused_variables`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unknown_lints)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/stack_and_heap.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let x = 5; // i32 stored on the stack
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `u`
[INFO] [stderr]   --> src/data_structures_2.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |     let u:&str = &letters; // d-ref conversions
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_u`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]  --> src/pattern_matching.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |         z @ 9...11 => "lots of", //assign range to variable
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `myLine`
[INFO] [stderr]   --> src/generics.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let myLine = Line { start: a, end: b };
[INFO] [stderr]    |         ^^^^^^ help: consider prefixing with an underscore: `_myLine`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `y`
[INFO] [stderr]  --> src/stack_and_heap.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     y: f64
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Red`
[INFO] [stderr]   --> src/data_structures_1.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     Red, // "memberless struct"
[INFO] [stderr]    |     ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Green`
[INFO] [stderr]   --> src/data_structures_1.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     Green, // "memberless struct"
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Blue`
[INFO] [stderr]   --> src/data_structures_1.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     Blue, // etc...
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RGBColor`
[INFO] [stderr]   --> src/data_structures_1.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     RGBColor(u8, u8, u8), // tuple
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cyan`
[INFO] [stderr]   --> src/data_structures_1.rs:32:15
[INFO] [stderr]    |
[INFO] [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
[INFO] [stderr]    |               ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `magenta`
[INFO] [stderr]   --> src/data_structures_1.rs:32:24
[INFO] [stderr]    |
[INFO] [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
[INFO] [stderr]    |                        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `yellow`
[INFO] [stderr]   --> src/data_structures_1.rs:32:36
[INFO] [stderr]    |
[INFO] [stderr] 32 |     CmykColor{cyan:u8, magenta:u8, yellow:u8, black:u8}, // struct
[INFO] [stderr]    |                                    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `start`
[INFO] [stderr]  --> src/generics.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     start: Point<T>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `end`
[INFO] [stderr]  --> src/generics.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     end: Point<T>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `myLine` should have a snake case name
[INFO] [stderr]   --> src/data_structures_1.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let myLine = Line { start: p, end: p2 };
[INFO] [stderr]    |         ^^^^^^ help: convert the identifier to snake case: `my_line`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `myLine` should have a snake case name
[INFO] [stderr]   --> src/generics.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let myLine = Line { start: a, end: b };
[INFO] [stderr]    |         ^^^^^^ help: convert the identifier to snake case: `my_line`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `"docker" "inspect" "1aae82bf8b95ea95fc38b8bd8994962cd40dcf8565fedf17d9b267982d1d04dd"`
[INFO] running `"docker" "rm" "-f" "1aae82bf8b95ea95fc38b8bd8994962cd40dcf8565fedf17d9b267982d1d04dd"`
[INFO] [stdout] 1aae82bf8b95ea95fc38b8bd8994962cd40dcf8565fedf17d9b267982d1d04dd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/caporta/rust_fundamentals:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] efd1a54ba8a074f3ff2981e61c7d4bf4836d832c12015d265783e916175c542f
[INFO] running `"docker" "start" "-a" "efd1a54ba8a074f3ff2981e61c7d4bf4836d832c12015d265783e916175c542f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello_world-bb329a3a7398744b
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "efd1a54ba8a074f3ff2981e61c7d4bf4836d832c12015d265783e916175c542f"`
[INFO] running `"docker" "rm" "-f" "efd1a54ba8a074f3ff2981e61c7d4bf4836d832c12015d265783e916175c542f"`
[INFO] [stdout] efd1a54ba8a074f3ff2981e61c7d4bf4836d832c12015d265783e916175c542f