Dec 12 10:05:55.264 INFO checking picto-0.4.3 against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 12 10:05:55.264 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-5/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 12 10:05:55.459 INFO [stdout] cb13eabe4d7a4de874d7d0482447b2bc6539fe07e5991bb31a4447b790d143e7
Dec 12 10:05:55.461 INFO running `"docker" "start" "-a" "cb13eabe4d7a4de874d7d0482447b2bc6539fe07e5991bb31a4447b790d143e7"`
Dec 12 10:05:55.963 INFO [stderr] usermod: no changes
Dec 12 10:05:56.156 INFO [stderr]     Checking png v0.6.2
Dec 12 10:05:56.156 INFO [stderr]     Checking imagefmt v4.0.0
Dec 12 10:05:56.156 INFO [stderr]     Checking xyz v0.2.1
Dec 12 10:05:56.156 INFO [stderr]    Compiling palette v0.2.1
Dec 12 10:05:58.901 INFO [stderr]     Checking image v0.12.4
Dec 12 10:06:04.740 INFO [stderr]     Checking picto v0.4.3 (/source)
Dec 12 10:06:08.814 INFO [stderr] warning: variable does not need to be mutable
Dec 12 10:06:08.814 INFO [stderr]    --> src/buffer/buffer.rs:514:10
Dec 12 10:06:08.814 INFO [stderr]     |
Dec 12 10:06:08.814 INFO [stderr] 514 |     fn from(mut value: &'a mut Buffer<P, C, D>) -> view::Write<'a, P, C> {
Dec 12 10:06:08.814 INFO [stderr]     |             ----^^^^^
Dec 12 10:06:08.814 INFO [stderr]     |             |
Dec 12 10:06:08.814 INFO [stderr]     |             help: remove this `mut`
Dec 12 10:06:08.814 INFO [stderr]     |
Dec 12 10:06:08.814 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 10:06:08.814 INFO [stderr] 
Dec 12 10:06:08.814 INFO [stderr] warning: variable does not need to be mutable
Dec 12 10:06:08.814 INFO [stderr]    --> src/buffer/buffer.rs:525:10
Dec 12 10:06:08.814 INFO [stderr]     |
Dec 12 10:06:08.814 INFO [stderr] 525 |     fn from(mut value: &'a mut Buffer<P, C, D>) -> View<'a, P, C> {
Dec 12 10:06:08.814 INFO [stderr]     |             ----^^^^^
Dec 12 10:06:08.814 INFO [stderr]     |             |
Dec 12 10:06:08.814 INFO [stderr]     |             help: remove this `mut`
Dec 12 10:06:08.814 INFO [stderr] 
Dec 12 10:06:09.109 INFO [stderr] warning: field is never used: `owner`
Dec 12 10:06:09.109 INFO [stderr]   --> src/iter/pixel/immutable.rs:27:2
Dec 12 10:06:09.109 INFO [stderr]    |
Dec 12 10:06:09.109 INFO [stderr] 27 |     owner: Region,
Dec 12 10:06:09.109 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 12 10:06:09.109 INFO [stderr]    |
Dec 12 10:06:09.109 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 10:06:09.109 INFO [stderr] 
Dec 12 10:06:09.109 INFO [stderr] warning: field is never used: `owner`
Dec 12 10:06:09.109 INFO [stderr]   --> src/iter/pixel/mutable.rs:28:2
Dec 12 10:06:09.109 INFO [stderr]    |
Dec 12 10:06:09.109 INFO [stderr] 28 |     owner: Region,
Dec 12 10:06:09.109 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 12 10:06:09.109 INFO [stderr] 
Dec 12 10:06:13.420 INFO [stderr] warning: variable does not need to be mutable
Dec 12 10:06:13.420 INFO [stderr]    --> src/buffer/buffer.rs:514:10
Dec 12 10:06:13.420 INFO [stderr]     |
Dec 12 10:06:13.420 INFO [stderr] 514 |     fn from(mut value: &'a mut Buffer<P, C, D>) -> view::Write<'a, P, C> {
Dec 12 10:06:13.420 INFO [stderr]     |             ----^^^^^
Dec 12 10:06:13.420 INFO [stderr]     |             |
Dec 12 10:06:13.420 INFO [stderr]     |             help: remove this `mut`
Dec 12 10:06:13.420 INFO [stderr]     |
Dec 12 10:06:13.420 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 12 10:06:13.420 INFO [stderr] 
Dec 12 10:06:13.420 INFO [stderr] warning: variable does not need to be mutable
Dec 12 10:06:13.420 INFO [stderr]    --> src/buffer/buffer.rs:525:10
Dec 12 10:06:13.420 INFO [stderr]     |
Dec 12 10:06:13.420 INFO [stderr] 525 |     fn from(mut value: &'a mut Buffer<P, C, D>) -> View<'a, P, C> {
Dec 12 10:06:13.420 INFO [stderr]     |             ----^^^^^
Dec 12 10:06:13.420 INFO [stderr]     |             |
Dec 12 10:06:13.420 INFO [stderr]     |             help: remove this `mut`
Dec 12 10:06:13.420 INFO [stderr] 
Dec 12 10:06:15.329 INFO [stderr] warning: field is never used: `owner`
Dec 12 10:06:15.329 INFO [stderr]   --> src/iter/pixel/immutable.rs:27:2
Dec 12 10:06:15.329 INFO [stderr]    |
Dec 12 10:06:15.329 INFO [stderr] 27 |     owner: Region,
Dec 12 10:06:15.329 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 12 10:06:15.329 INFO [stderr]    |
Dec 12 10:06:15.329 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 10:06:15.329 INFO [stderr] 
Dec 12 10:06:15.329 INFO [stderr] warning: field is never used: `owner`
Dec 12 10:06:15.329 INFO [stderr]   --> src/iter/pixel/mutable.rs:28:2
Dec 12 10:06:15.329 INFO [stderr]    |
Dec 12 10:06:15.329 INFO [stderr] 28 |     owner: Region,
Dec 12 10:06:15.329 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 12 10:06:15.329 INFO [stderr] 
Dec 12 10:06:20.796 INFO [stderr] warning: constant item is never used: `LOWER`
Dec 12 10:06:20.796 INFO [stderr]   --> examples/draw.rs:25:1
Dec 12 10:06:20.796 INFO [stderr]    |
Dec 12 10:06:20.796 INFO [stderr] 25 | const LOWER: char = '▄';
Dec 12 10:06:20.796 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 12 10:06:20.796 INFO [stderr]    |
Dec 12 10:06:20.796 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 12 10:06:20.796 INFO [stderr] 
Dec 12 10:06:25.804 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 29.82s
Dec 12 10:06:25.815 INFO [stderr] su: No module specific data is present
Dec 12 10:06:26.129 INFO running `"docker" "inspect" "cb13eabe4d7a4de874d7d0482447b2bc6539fe07e5991bb31a4447b790d143e7"`
Dec 12 10:06:26.280 INFO running `"docker" "rm" "-f" "cb13eabe4d7a4de874d7d0482447b2bc6539fe07e5991bb31a4447b790d143e7"`
Dec 12 10:06:26.490 INFO [stdout] cb13eabe4d7a4de874d7d0482447b2bc6539fe07e5991bb31a4447b790d143e7