[INFO] updating cached repository nlsnightmare/grockets-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nlsnightmare/grockets-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nlsnightmare/grockets-rs" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/nlsnightmare/grockets-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/nlsnightmare/grockets-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nlsnightmare/grockets-rs" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/nlsnightmare/grockets-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/nlsnightmare/grockets-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 85bae8f6b1bb24b051ce5898d2ab55b1c913e6c3
[INFO] sha for GitHub repo nlsnightmare/grockets-rs: 85bae8f6b1bb24b051ce5898d2ab55b1c913e6c3
[INFO] validating manifest of nlsnightmare/grockets-rs on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nlsnightmare/grockets-rs on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nlsnightmare/grockets-rs
[INFO] finished frobbing nlsnightmare/grockets-rs
[INFO] frobbed toml for nlsnightmare/grockets-rs written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/nlsnightmare/grockets-rs/Cargo.toml
[INFO] started frobbing nlsnightmare/grockets-rs
[INFO] finished frobbing nlsnightmare/grockets-rs
[INFO] frobbed toml for nlsnightmare/grockets-rs written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/nlsnightmare/grockets-rs/Cargo.toml
[INFO] crate nlsnightmare/grockets-rs has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing nlsnightmare/grockets-rs against master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-2/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/nlsnightmare/grockets-rs:/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" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "build" "--frozen"`
[INFO] [stdout] 776b81f9b742dfc8a2eb8a2ffcac327ef401b54de1d92bb7e93c7e24fbef3185
[INFO] running `"docker" "start" "-a" "776b81f9b742dfc8a2eb8a2ffcac327ef401b54de1d92bb7e93c7e24fbef3185"`
[INFO] [stderr]    Compiling stb_truetype v0.2.4
[INFO] [stderr]    Compiling gl_generator v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling num-derive v0.2.3
[INFO] [stderr]    Compiling png v0.12.0
[INFO] [stderr]    Compiling pistoncore-input v0.21.0
[INFO] [stderr]    Compiling smithay-client-toolkit v0.3.0
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling rusttype v0.4.3
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling glutin v0.18.0
[INFO] [stderr]    Compiling gl v0.10.0
[INFO] [stderr]    Compiling piston2d-graphics v0.26.0
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]    Compiling pistoncore-window v0.32.0
[INFO] [stderr]    Compiling tiff v0.2.1
[INFO] [stderr]    Compiling winit v0.17.2
[INFO] [stderr]    Compiling pistoncore-event_loop v0.37.0
[INFO] [stderr]    Compiling piston v0.37.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling image v0.20.0
[INFO] [stderr]    Compiling pistoncore-glutin_window v0.48.0
[INFO] [stderr]    Compiling piston2d-opengl_graphics v0.54.0
[INFO] [stderr]    Compiling grockets-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `rocket::Rocket`
[INFO] [stderr]   --> src/main.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 | use rocket::Rocket;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dna2`
[INFO] [stderr]   --> src/rocket.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |         let dna2 = &r2.dna;
[INFO] [stderr]    |             ^^^^ help: consider prefixing with an underscore: `_dna2`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0594]: cannot assign to field `new_rocket.dna` of immutable binding
[INFO] [stderr]   --> src/rocket.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 |         new_rocket.dna = new_dna;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^ cannot mutably borrow field of immutable binding
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/rocket.rs:56:13
[INFO] [stderr]    |
[INFO] [stderr] 56 |         let mut new_rocket = r1;
[INFO] [stderr]    |             ----^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0594`.
[INFO] [stderr] error: Could not compile `grockets-rs`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "776b81f9b742dfc8a2eb8a2ffcac327ef401b54de1d92bb7e93c7e24fbef3185"`
[INFO] running `"docker" "rm" "-f" "776b81f9b742dfc8a2eb8a2ffcac327ef401b54de1d92bb7e93c7e24fbef3185"`
[INFO] [stdout] 776b81f9b742dfc8a2eb8a2ffcac327ef401b54de1d92bb7e93c7e24fbef3185