[INFO] updating cached repository marionebl/rust-by-example-exercises
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/marionebl/rust-by-example-exercises
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/marionebl/rust-by-example-exercises" "work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/marionebl/rust-by-example-exercises"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/marionebl/rust-by-example-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/marionebl/rust-by-example-exercises" "work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/marionebl/rust-by-example-exercises"`
[INFO] [stderr] Cloning into 'work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/marionebl/rust-by-example-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b22ea9a4d0448f54fdbc20b0d014f13f44ae816e
[INFO] sha for GitHub repo marionebl/rust-by-example-exercises: b22ea9a4d0448f54fdbc20b0d014f13f44ae816e
[INFO] validating manifest of marionebl/rust-by-example-exercises on toolchain master#5f9c0448dde167128d668da4555879f64e56af1d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of marionebl/rust-by-example-exercises on toolchain try#8ec8125bea94852768b56958f05da47666c21ab0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing marionebl/rust-by-example-exercises
[INFO] finished frobbing marionebl/rust-by-example-exercises
[INFO] frobbed toml for marionebl/rust-by-example-exercises written to work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/marionebl/rust-by-example-exercises/Cargo.toml
[INFO] started frobbing marionebl/rust-by-example-exercises
[INFO] finished frobbing marionebl/rust-by-example-exercises
[INFO] frobbed toml for marionebl/rust-by-example-exercises written to work/ex/pr-62133/sources/try#8ec8125bea94852768b56958f05da47666c21ab0/gh/marionebl/rust-by-example-exercises/Cargo.toml
[INFO] crate marionebl/rust-by-example-exercises already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+8ec8125bea94852768b56958f05da47666c21ab0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking marionebl/rust-by-example-exercises against master#5f9c0448dde167128d668da4555879f64e56af1d for pr-62133
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62133/worker-7/master#5f9c0448dde167128d668da4555879f64e56af1d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62133/sources/master#5f9c0448dde167128d668da4555879f64e56af1d/gh/marionebl/rust-by-example-exercises:/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" "+5f9c0448dde167128d668da4555879f64e56af1d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 55649e631e1b902e25e0211e6191dcff29570030456e07259ad7ed1860581f1e
[INFO] running `"docker" "start" "-a" "55649e631e1b902e25e0211e6191dcff29570030456e07259ad7ed1860581f1e"`
[INFO] [stderr]     Checking rust-by-example-exercises v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/bin/7-expressions.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         2 * x;
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/bin/9-2-5-closures-as-output.rs:9:23
[INFO] [stderr]   |
[INFO] [stderr] 9 | fn create_fn() -> Box<Fn()> {
[INFO] [stderr]   |                       ^^^^ help: use `dyn`: `dyn Fn()`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/bin/9-2-5-closures-as-output.rs:14:26
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn create_fnmut() -> Box<FnMut()> {
[INFO] [stderr]    |                          ^^^^^^^ help: use `dyn`: `dyn FnMut()`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `noisy_unused_function`
[INFO] [stderr]  --> src/bin/12-1-attributes-dead-code.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn noisy_unused_function() {}
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> src/bin/8-5-match.rs:22:15
[INFO] [stderr]    |
[INFO] [stderr] 22 |             13...19 => println!("This is 13...19"),
[INFO] [stderr]    |               ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(ellipsis_inclusive_range_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RGB`
[INFO] [stderr]   --> src/bin/8-5-match.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     RGB(u8, u8, u8),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `HSV`
[INFO] [stderr]   --> src/bin/8-5-match.rs:83:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     HSV(u16, u8, u8),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `HSL`
[INFO] [stderr]   --> src/bin/8-5-match.rs:84:5
[INFO] [stderr]    |
[INFO] [stderr] 84 |     HSL(u16, u8, u8),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CMY`
[INFO] [stderr]   --> src/bin/8-5-match.rs:85:5
[INFO] [stderr]    |
[INFO] [stderr] 85 |     CMY(u8, u8, u8),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CMYK`
[INFO] [stderr]   --> src/bin/8-5-match.rs:86:5
[INFO] [stderr]    |
[INFO] [stderr] 86 |     CMYK(u8, u8, u8, u8)
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: expected item, found `36`
[INFO] [stderr]   --> src/bin/13-5-2-generic-bounds-multiple.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | 36
[INFO] [stderr]    | ^^ expected item
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `rust-by-example-exercises`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/bin/8-2-loop.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         println!("This point will never be reached");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_code)] on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/bin/8-2-loop.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         println!("This point will never be reached");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_code)] on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/bin/7-expressions.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |         2 * x;
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "55649e631e1b902e25e0211e6191dcff29570030456e07259ad7ed1860581f1e"`
[INFO] running `"docker" "rm" "-f" "55649e631e1b902e25e0211e6191dcff29570030456e07259ad7ed1860581f1e"`
[INFO] [stdout] 55649e631e1b902e25e0211e6191dcff29570030456e07259ad7ed1860581f1e