Dec 18 14:11:09.849 INFO checking mai-0.1.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 14:11:09.849 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/mai/0.1.0:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 14:11:10.268 INFO [stdout] 933b6c996edbb82613f03c75e05a849bfa80c9435ea96d1198905fd0de71fbaa
Dec 18 14:11:10.272 INFO running `"docker" "start" "-a" "933b6c996edbb82613f03c75e05a849bfa80c9435ea96d1198905fd0de71fbaa"`
Dec 18 14:11:11.560 INFO [stderr]     Checking lifeguard v0.5.2
Dec 18 14:11:12.052 INFO [stderr]     Checking mai v0.1.0 (/opt/crater/workdir)
Dec 18 14:11:13.148 INFO [stderr] warning: unused import: `Evented`
Dec 18 14:11:13.148 INFO [stderr]  --> src/protocol_engine.rs:1:11
Dec 18 14:11:13.148 INFO [stderr]   |
Dec 18 14:11:13.148 INFO [stderr] 1 | use mio::{Evented, EventSet, PollOpt, Token};
Dec 18 14:11:13.148 INFO [stderr]   |           ^^^^^^^
Dec 18 14:11:13.148 INFO [stderr]   |
Dec 18 14:11:13.148 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 14:11:13.148 INFO [stderr] 
Dec 18 14:11:13.148 INFO [stderr] warning: unused import: `Recycleable`
Dec 18 14:11:13.148 INFO [stderr]  --> src/protocol_engine.rs:5:23
Dec 18 14:11:13.148 INFO [stderr]   |
Dec 18 14:11:13.148 INFO [stderr] 5 | use lifeguard::{self, Recycleable, Pool, StartingSize, MaxSize, Supplier};
Dec 18 14:11:13.148 INFO [stderr]   |                       ^^^^^^^^^^^
Dec 18 14:11:13.148 INFO [stderr] 
Dec 18 14:11:13.148 INFO [stderr] warning: unused import: `Read`
Dec 18 14:11:13.148 INFO [stderr]  --> src/protocol_engine.rs:8:21
Dec 18 14:11:13.148 INFO [stderr]   |
Dec 18 14:11:13.148 INFO [stderr] 8 | use std::io::{self, Read, Write};
Dec 18 14:11:13.148 INFO [stderr]   |                     ^^^^
Dec 18 14:11:13.148 INFO [stderr] 
Dec 18 14:11:13.148 INFO [stderr] warning: unused import: `Write`
Dec 18 14:11:13.148 INFO [stderr]  --> src/protocol_engine.rs:8:27
Dec 18 14:11:13.148 INFO [stderr]   |
Dec 18 14:11:13.148 INFO [stderr] 8 | use std::io::{self, Read, Write};
Dec 18 14:11:13.148 INFO [stderr]   |                           ^^^^^
Dec 18 14:11:13.148 INFO [stderr] 
Dec 18 14:11:13.228 INFO [stderr] warning: unused import: `Evented`
Dec 18 14:11:13.228 INFO [stderr]  --> src/protocol_engine.rs:1:11
Dec 18 14:11:13.228 INFO [stderr]   |
Dec 18 14:11:13.228 INFO [stderr] 1 | use mio::{Evented, EventSet, PollOpt, Token};
Dec 18 14:11:13.228 INFO [stderr]   |           ^^^^^^^
Dec 18 14:11:13.228 INFO [stderr]   |
Dec 18 14:11:13.228 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 14:11:13.228 INFO [stderr] 
Dec 18 14:11:13.228 INFO [stderr] warning: unused import: `Recycleable`
Dec 18 14:11:13.228 INFO [stderr]  --> src/protocol_engine.rs:5:23
Dec 18 14:11:13.228 INFO [stderr]   |
Dec 18 14:11:13.228 INFO [stderr] 5 | use lifeguard::{self, Recycleable, Pool, StartingSize, MaxSize, Supplier};
Dec 18 14:11:13.228 INFO [stderr]   |                       ^^^^^^^^^^^
Dec 18 14:11:13.228 INFO [stderr] 
Dec 18 14:11:13.228 INFO [stderr] warning: unused import: `Read`
Dec 18 14:11:13.228 INFO [stderr]  --> src/protocol_engine.rs:8:21
Dec 18 14:11:13.228 INFO [stderr]   |
Dec 18 14:11:13.228 INFO [stderr] 8 | use std::io::{self, Read, Write};
Dec 18 14:11:13.228 INFO [stderr]   |                     ^^^^
Dec 18 14:11:13.228 INFO [stderr] 
Dec 18 14:11:13.228 INFO [stderr] warning: unused import: `Write`
Dec 18 14:11:13.228 INFO [stderr]  --> src/protocol_engine.rs:8:27
Dec 18 14:11:13.228 INFO [stderr]   |
Dec 18 14:11:13.228 INFO [stderr] 8 | use std::io::{self, Read, Write};
Dec 18 14:11:13.228 INFO [stderr]   |                           ^^^^^
Dec 18 14:11:13.228 INFO [stderr] 
Dec 18 14:11:13.290 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:11:13.290 INFO [stderr]    --> src/evented_frame_stream.rs:215:9
Dec 18 14:11:13.290 INFO [stderr]     |
Dec 18 14:11:13.290 INFO [stderr] 215 |     let mut outbox = self.outbox(outbox_pool);
Dec 18 14:11:13.290 INFO [stderr]     |         ----^^^^^^
Dec 18 14:11:13.290 INFO [stderr]     |         |
Dec 18 14:11:13.290 INFO [stderr]     |         help: remove this `mut`
Dec 18 14:11:13.290 INFO [stderr]     |
Dec 18 14:11:13.290 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 14:11:13.290 INFO [stderr] 
Dec 18 14:11:13.290 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:11:13.290 INFO [stderr]    --> src/evented_frame_stream.rs:215:9
Dec 18 14:11:13.290 INFO [stderr]     |
Dec 18 14:11:13.290 INFO [stderr] 215 |     let mut outbox = self.outbox(outbox_pool);
Dec 18 14:11:13.290 INFO [stderr]     |         ----^^^^^^
Dec 18 14:11:13.290 INFO [stderr]     |         |
Dec 18 14:11:13.290 INFO [stderr]     |         help: remove this `mut`
Dec 18 14:11:13.290 INFO [stderr]     |
Dec 18 14:11:13.290 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 14:11:13.290 INFO [stderr] 
Dec 18 14:11:13.308 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:11:13.308 INFO [stderr]    --> src/protocol_engine.rs:131:12
Dec 18 14:11:13.308 INFO [stderr]     |
Dec 18 14:11:13.308 INFO [stderr] 131 |        let mut stream_session: &mut StreamSession<P> = stream_session.unwrap();
Dec 18 14:11:13.308 INFO [stderr]     |            ----^^^^^^^^^^^^^^
Dec 18 14:11:13.308 INFO [stderr]     |            |
Dec 18 14:11:13.308 INFO [stderr]     |            help: remove this `mut`
Dec 18 14:11:13.308 INFO [stderr] 
Dec 18 14:11:13.308 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:11:13.308 INFO [stderr]    --> src/protocol_engine.rs:133:22
Dec 18 14:11:13.308 INFO [stderr]     |
Dec 18 14:11:13.308 INFO [stderr] 133 |        let (mut efs, mut session) = stream_session.components();
Dec 18 14:11:13.308 INFO [stderr]     |                      ----^^^^^^^
Dec 18 14:11:13.308 INFO [stderr]     |                      |
Dec 18 14:11:13.308 INFO [stderr]     |                      help: remove this `mut`
Dec 18 14:11:13.308 INFO [stderr] 
Dec 18 14:11:13.308 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:11:13.308 INFO [stderr]    --> src/protocol_engine.rs:133:13
Dec 18 14:11:13.309 INFO [stderr]     |
Dec 18 14:11:13.309 INFO [stderr] 133 |        let (mut efs, mut session) = stream_session.components();
Dec 18 14:11:13.309 INFO [stderr]     |             ----^^^
Dec 18 14:11:13.309 INFO [stderr]     |             |
Dec 18 14:11:13.309 INFO [stderr]     |             help: remove this `mut`
Dec 18 14:11:13.309 INFO [stderr] 
Dec 18 14:11:13.320 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:11:13.320 INFO [stderr]    --> src/protocol_engine.rs:131:12
Dec 18 14:11:13.320 INFO [stderr]     |
Dec 18 14:11:13.320 INFO [stderr] 131 |        let mut stream_session: &mut StreamSession<P> = stream_session.unwrap();
Dec 18 14:11:13.320 INFO [stderr]     |            ----^^^^^^^^^^^^^^
Dec 18 14:11:13.320 INFO [stderr]     |            |
Dec 18 14:11:13.320 INFO [stderr]     |            help: remove this `mut`
Dec 18 14:11:13.320 INFO [stderr] 
Dec 18 14:11:13.320 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:11:13.320 INFO [stderr]    --> src/protocol_engine.rs:133:22
Dec 18 14:11:13.320 INFO [stderr]     |
Dec 18 14:11:13.320 INFO [stderr] 133 |        let (mut efs, mut session) = stream_session.components();
Dec 18 14:11:13.320 INFO [stderr]     |                      ----^^^^^^^
Dec 18 14:11:13.320 INFO [stderr]     |                      |
Dec 18 14:11:13.320 INFO [stderr]     |                      help: remove this `mut`
Dec 18 14:11:13.320 INFO [stderr] 
Dec 18 14:11:13.320 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:11:13.320 INFO [stderr]    --> src/protocol_engine.rs:133:13
Dec 18 14:11:13.321 INFO [stderr]     |
Dec 18 14:11:13.321 INFO [stderr] 133 |        let (mut efs, mut session) = stream_session.components();
Dec 18 14:11:13.321 INFO [stderr]     |             ----^^^
Dec 18 14:11:13.321 INFO [stderr]     |             |
Dec 18 14:11:13.321 INFO [stderr]     |             help: remove this `mut`
Dec 18 14:11:13.321 INFO [stderr] 
Dec 18 14:11:13.368 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:11:13.368 INFO [stderr]    --> src/protocol_engine.rs:531:26
Dec 18 14:11:13.368 INFO [stderr]     |
Dec 18 14:11:13.368 INFO [stderr] 531 |     let (codec, _stream, mut write_buffer, outbox) = efs.writing_toolset(buffer_pool, outbox_pool);
Dec 18 14:11:13.368 INFO [stderr]     |                          ----^^^^^^^^^^^^
Dec 18 14:11:13.368 INFO [stderr]     |                          |
Dec 18 14:11:13.368 INFO [stderr]     |                          help: remove this `mut`
Dec 18 14:11:13.368 INFO [stderr] 
Dec 18 14:11:13.376 INFO [stderr] warning: variable does not need to be mutable
Dec 18 14:11:13.376 INFO [stderr]    --> src/protocol_engine.rs:531:26
Dec 18 14:11:13.376 INFO [stderr]     |
Dec 18 14:11:13.376 INFO [stderr] 531 |     let (codec, _stream, mut write_buffer, outbox) = efs.writing_toolset(buffer_pool, outbox_pool);
Dec 18 14:11:13.376 INFO [stderr]     |                          ----^^^^^^^^^^^^
Dec 18 14:11:13.376 INFO [stderr]     |                          |
Dec 18 14:11:13.376 INFO [stderr]     |                          help: remove this `mut`
Dec 18 14:11:13.376 INFO [stderr] 
Dec 18 14:11:14.115 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.60s
Dec 18 14:11:14.368 INFO running `"docker" "inspect" "933b6c996edbb82613f03c75e05a849bfa80c9435ea96d1198905fd0de71fbaa"`
Dec 18 14:11:14.440 INFO running `"docker" "rm" "-f" "933b6c996edbb82613f03c75e05a849bfa80c9435ea96d1198905fd0de71fbaa"`
Dec 18 14:11:14.548 INFO [stdout] 933b6c996edbb82613f03c75e05a849bfa80c9435ea96d1198905fd0de71fbaa