[INFO] updating cached repository JulianKniephoff/snek
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/JulianKniephoff/snek
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/JulianKniephoff/snek" "work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/JulianKniephoff/snek"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/JulianKniephoff/snek'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/JulianKniephoff/snek" "work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/JulianKniephoff/snek"`
[INFO] [stderr] Cloning into 'work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/JulianKniephoff/snek'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 61779e54be45775750b6be9a9d2ff1bd8e76b744
[INFO] sha for GitHub repo JulianKniephoff/snek: 61779e54be45775750b6be9a9d2ff1bd8e76b744
[INFO] validating manifest of JulianKniephoff/snek on toolchain master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of JulianKniephoff/snek on toolchain try#58b21121d0b447ceb3f1a655155d802191acf044
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing JulianKniephoff/snek
[INFO] finished frobbing JulianKniephoff/snek
[INFO] frobbed toml for JulianKniephoff/snek written to work/ex/pr-61100/sources/master#8869ee03d7f258e1b76a11c6fbb01b5708a9f504/gh/JulianKniephoff/snek/Cargo.toml
[INFO] started frobbing JulianKniephoff/snek
[INFO] finished frobbing JulianKniephoff/snek
[INFO] frobbed toml for JulianKniephoff/snek written to work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/JulianKniephoff/snek/Cargo.toml
[INFO] crate JulianKniephoff/snek already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+8869ee03d7f258e1b76a11c6fbb01b5708a9f504-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking JulianKniephoff/snek against try#58b21121d0b447ceb3f1a655155d802191acf044 for pr-61100
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-61100/worker-3/try#58b21121d0b447ceb3f1a655155d802191acf044:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-61100/sources/try#58b21121d0b447ceb3f1a655155d802191acf044/gh/JulianKniephoff/snek:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+58b21121d0b447ceb3f1a655155d802191acf044-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 14f6ccf6b6a6b44343b6e080a5f96687ec2cdb1e891a5a100e594a00a649d853
[INFO] running `"docker" "start" "-a" "14f6ccf6b6a6b44343b6e080a5f96687ec2cdb1e891a5a100e594a00a649d853"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]    Compiling wasm-bindgen v0.2.33
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking rand_os v0.1.2
[INFO] [stderr]    Compiling weedle v0.8.0
[INFO] [stderr]     Checking js-sys v0.3.10
[INFO] [stderr]     Checking console_error_panic_hook v0.1.5
[INFO] [stderr]    Compiling wasm-bindgen-webidl v0.2.27
[INFO] [stderr]    Compiling web-sys v0.3.10
[INFO] [stderr]     Checking snek v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: cannot borrow `self.segments` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/lib.rs:81:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |             let current_head = self.segments.front().unwrap();
[INFO] [stderr]    |                                ------------- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 81 |             self.segments.push_front(Segment::new(
[INFO] [stderr]    |             ^^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stderr] 82 |                 new_start,
[INFO] [stderr] 83 |                 current_head.start,
[INFO] [stderr]    |                 ------------------ immutable borrow later used here
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(mutable_borrow_reservation_conflict)] on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `try_from` has been stable since 1.34.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(try_from)]
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `starting_length` should have an upper case name
[INFO] [stderr]   --> src/lib.rs:38:15
[INFO] [stderr]    |
[INFO] [stderr] 38 |         const starting_length: usize = 5;
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^ help: convert the identifier to upper case: `STARTING_LENGTH`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_upper_case_globals)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:317:5
[INFO] [stderr]     |
[INFO] [stderr] 317 |     context.scale(PIXELS_PER_TILE as f64, PIXELS_PER_TILE as f64);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:320:5
[INFO] [stderr]     |
[INFO] [stderr] 320 |     context.translate(1.0, 1.0);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:322:5
[INFO] [stderr]     |
[INFO] [stderr] 322 |     context.translate(0.5, 0.5);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:341:5
[INFO] [stderr]     |
[INFO] [stderr] 341 |     context.translate(0.5, 0.5);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:365:5
[INFO] [stderr]     |
[INFO] [stderr] 365 |     canvas.style().set_property("width", &(canvas_width.to_string() + "px"));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:366:5
[INFO] [stderr]     |
[INFO] [stderr] 366 |     canvas.style().set_property("height", &(canvas_height.to_string() + "px"));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:379:5
[INFO] [stderr]     |
[INFO] [stderr] 379 | /     target.add_event_listener_with_callback(
[INFO] [stderr] 380 | |         event_type,
[INFO] [stderr] 381 | |         closure.as_ref().unchecked_ref()
[INFO] [stderr] 382 | |     );
[INFO] [stderr]     | |______^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/screen.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 | /         self.front_buffer.context.scale(
[INFO] [stderr] 40 | |             scale as f64,
[INFO] [stderr] 41 | |             scale as f64,
[INFO] [stderr] 42 | |         );
[INFO] [stderr]    | |__________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: cannot borrow `self.segments` as mutable because it is also borrowed as immutable
[INFO] [stderr]   --> src/lib.rs:81:13
[INFO] [stderr]    |
[INFO] [stderr] 76 |             let current_head = self.segments.front().unwrap();
[INFO] [stderr]    |                                ------------- immutable borrow occurs here
[INFO] [stderr] ...
[INFO] [stderr] 81 |             self.segments.push_front(Segment::new(
[INFO] [stderr]    |             ^^^^^^^^^^^^^ mutable borrow occurs here
[INFO] [stderr] 82 |                 new_start,
[INFO] [stderr] 83 |                 current_head.start,
[INFO] [stderr]    |                 ------------------ immutable borrow later used here
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(mutable_borrow_reservation_conflict)] on by default
[INFO] [stderr]    = warning: this borrowing pattern was not meant to be accepted, and may become a hard error in the future
[INFO] [stderr]    = note: for more information, see issue #59159 <https://github.com/rust-lang/rust/issues/59159>
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `try_from` has been stable since 1.34.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(try_from)]
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `starting_length` should have an upper case name
[INFO] [stderr]   --> src/lib.rs:38:15
[INFO] [stderr]    |
[INFO] [stderr] 38 |         const starting_length: usize = 5;
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^ help: convert the identifier to upper case: `STARTING_LENGTH`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_upper_case_globals)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:317:5
[INFO] [stderr]     |
[INFO] [stderr] 317 |     context.scale(PIXELS_PER_TILE as f64, PIXELS_PER_TILE as f64);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:320:5
[INFO] [stderr]     |
[INFO] [stderr] 320 |     context.translate(1.0, 1.0);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:322:5
[INFO] [stderr]     |
[INFO] [stderr] 322 |     context.translate(0.5, 0.5);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:341:5
[INFO] [stderr]     |
[INFO] [stderr] 341 |     context.translate(0.5, 0.5);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:365:5
[INFO] [stderr]     |
[INFO] [stderr] 365 |     canvas.style().set_property("width", &(canvas_width.to_string() + "px"));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:366:5
[INFO] [stderr]     |
[INFO] [stderr] 366 |     canvas.style().set_property("height", &(canvas_height.to_string() + "px"));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:379:5
[INFO] [stderr]     |
[INFO] [stderr] 379 | /     target.add_event_listener_with_callback(
[INFO] [stderr] 380 | |         event_type,
[INFO] [stderr] 381 | |         closure.as_ref().unchecked_ref()
[INFO] [stderr] 382 | |     );
[INFO] [stderr]     | |______^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/screen.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 | /         self.front_buffer.context.scale(
[INFO] [stderr] 40 | |             scale as f64,
[INFO] [stderr] 41 | |             scale as f64,
[INFO] [stderr] 42 | |         );
[INFO] [stderr]    | |__________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.84s
[INFO] running `"docker" "inspect" "14f6ccf6b6a6b44343b6e080a5f96687ec2cdb1e891a5a100e594a00a649d853"`
[INFO] running `"docker" "rm" "-f" "14f6ccf6b6a6b44343b6e080a5f96687ec2cdb1e891a5a100e594a00a649d853"`
[INFO] [stdout] 14f6ccf6b6a6b44343b6e080a5f96687ec2cdb1e891a5a100e594a00a649d853