[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-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/nlsnightmare/grockets-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/nlsnightmare/grockets-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nlsnightmare/grockets-rs" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/nlsnightmare/grockets-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/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#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nlsnightmare/grockets-rs on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-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-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/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-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/nlsnightmare/grockets-rs/Cargo.toml
[INFO] crate nlsnightmare/grockets-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking nlsnightmare/grockets-rs against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-4/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0365b5b33e91a4c3cf6f299a0c36ab4eb8d7f5b51372c81f5cbc4e96ff8de887
[INFO] running `"docker" "start" "-a" "0365b5b33e91a4c3cf6f299a0c36ab4eb8d7f5b51372c81f5cbc4e96ff8de887"`
[INFO] [stderr]    Compiling syn v0.15.9
[INFO] [stderr]    Compiling serde_derive v1.0.79
[INFO] [stderr]    Compiling num-derive v0.2.3
[INFO] [stderr]     Checking tiff v0.2.1
[INFO] [stderr]     Checking image v0.20.0
[INFO] [stderr]     Checking pistoncore-input v0.21.0
[INFO] [stderr]     Checking piston2d-opengl_graphics v0.54.0
[INFO] [stderr]     Checking pistoncore-window v0.32.0
[INFO] [stderr]     Checking pistoncore-event_loop v0.37.0
[INFO] [stderr]     Checking pistoncore-glutin_window v0.48.0
[INFO] [stderr]     Checking piston v0.37.0
[INFO] [stderr]     Checking 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 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] warning: build failed, waiting for other jobs to finish...
[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" "0365b5b33e91a4c3cf6f299a0c36ab4eb8d7f5b51372c81f5cbc4e96ff8de887"`
[INFO] running `"docker" "rm" "-f" "0365b5b33e91a4c3cf6f299a0c36ab4eb8d7f5b51372c81f5cbc4e96ff8de887"`
[INFO] [stdout] 0365b5b33e91a4c3cf6f299a0c36ab4eb8d7f5b51372c81f5cbc4e96ff8de887