[INFO] crate divans 0.0.1 is already in cache
[INFO] extracting crate divans 0.0.1 into work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/reg/divans/0.0.1
[INFO] extracting crate divans 0.0.1 into work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/reg/divans/0.0.1
[INFO] validating manifest of divans-0.0.1 on toolchain master#39401465da4ce27aeeb2c2a26133ac35c63aa515
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of divans-0.0.1 on toolchain try#f45cc3094ee337acd688771b9234318046b0572d
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing divans-0.0.1
[INFO] finished frobbing divans-0.0.1
[INFO] frobbed toml for divans-0.0.1 written to work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/reg/divans/0.0.1/Cargo.toml
[INFO] started frobbing divans-0.0.1
[INFO] finished frobbing divans-0.0.1
[INFO] frobbed toml for divans-0.0.1 written to work/ex/pr-60914/sources/try#f45cc3094ee337acd688771b9234318046b0572d/reg/divans/0.0.1/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+f45cc3094ee337acd688771b9234318046b0572d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking divans-0.0.1 against master#39401465da4ce27aeeb2c2a26133ac35c63aa515 for pr-60914
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60914/worker-0/master#39401465da4ce27aeeb2c2a26133ac35c63aa515:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60914/sources/master#39401465da4ce27aeeb2c2a26133ac35c63aa515/reg/divans/0.0.1:/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" "+39401465da4ce27aeeb2c2a26133ac35c63aa515-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f2b66517b523b7f9da710a22bb9e8eff1e305d026085ecef2c5c41da3928b788
[INFO] running `"docker" "start" "-a" "f2b66517b523b7f9da710a22bb9e8eff1e305d026085ecef2c5c41da3928b788"`
[INFO] [stderr]     Checking alloc-no-stdlib v1.3.0
[INFO] [stderr]    Compiling divans v0.0.1 (/opt/crater/workdir)
[INFO] [stderr]     Checking brotli-decompressor v1.3.1
[INFO] [stderr]     Checking brotli v2.5.1
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/codec/copy.rs:91:25
[INFO] [stderr]    |
[INFO] [stderr] 91 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:112:25
[INFO] [stderr]     |
[INFO] [stderr] 112 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:129:25
[INFO] [stderr]     |
[INFO] [stderr] 129 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:145:25
[INFO] [stderr]     |
[INFO] [stderr] 145 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:175:29
[INFO] [stderr]     |
[INFO] [stderr] 175 |                         let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                             ----^^^^^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:204:25
[INFO] [stderr]     |
[INFO] [stderr] 204 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:231:25
[INFO] [stderr]     |
[INFO] [stderr] 231 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:250:33
[INFO] [stderr]     |
[INFO] [stderr] 250 |                             let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                                 ----^^^^^^^^^^^
[INFO] [stderr]     |                                 |
[INFO] [stderr]     |                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/codec/dict.rs:84:25
[INFO] [stderr]    |
[INFO] [stderr] 84 |                     let mut nibble_prob = superstate.bk.dict_priors.get(DictCommandNibblePriorType::SizeBegNib, (ctype,));
[INFO] [stderr]    |                         ----^^^^^^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/dict.rs:100:25
[INFO] [stderr]     |
[INFO] [stderr] 100 |                     let mut nibble_prob = superstate.bk.dict_priors.get(DictCommandNibblePriorType::SizeLastNib, (ctype,));
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/dict.rs:119:25
[INFO] [stderr]     |
[INFO] [stderr] 119 |                     let mut nibble_prob = superstate.bk.dict_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/dict.rs:139:25
[INFO] [stderr]     |
[INFO] [stderr] 139 |                     let mut nibble_prob = superstate.bk.dict_priors.get(DictCommandNibblePriorType::Transform,
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/dict.rs:150:25
[INFO] [stderr]     |
[INFO] [stderr] 150 |                     let mut nibble_prob = superstate.bk.dict_priors.get(DictCommandNibblePriorType::Transform,
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:294:16
[INFO] [stderr]     |
[INFO] [stderr] 294 |            let mut byte_to_encode_val = specialization.get_literal_byte(in_cmd,
[INFO] [stderr]     |                ----^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                |
[INFO] [stderr]     |                help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:572:25
[INFO] [stderr]     |
[INFO] [stderr] 572 |                     let mut nibble_prob = superstate.bk.lit_len_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:600:25
[INFO] [stderr]     |
[INFO] [stderr] 600 |                     let mut nibble_prob = superstate.bk.lit_len_priors.get(LiteralCommandPriorType::SizeBegNib, (ctype,));
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:625:25
[INFO] [stderr]     |
[INFO] [stderr] 625 |                     let mut nibble_prob = superstate.bk.lit_len_priors.get(LiteralCommandPriorType::SizeLastNib, (ctype,));
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:640:25
[INFO] [stderr]     |
[INFO] [stderr] 640 |                     let mut nibble_prob = superstate.bk.lit_len_priors.get(LiteralCommandPriorType::SizeMantissaNib, (ctype,));
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:707:30
[INFO] [stderr]     |
[INFO] [stderr] 707 |                         Some(mut lc) => {
[INFO] [stderr]     |                              ----^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:174:28
[INFO] [stderr]     |
[INFO] [stderr] 174 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(PredictionModePriorType::Only, (0,));
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:195:28
[INFO] [stderr]     |
[INFO] [stderr] 195 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:211:28
[INFO] [stderr]     |
[INFO] [stderr] 211 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:235:24
[INFO] [stderr]     |
[INFO] [stderr] 235 |                    let mut nibble_prob = superstate.bk.prediction_priors.get(PredictionModePriorType::ContextMapSpeedPalette,
[INFO] [stderr]     |                        ----^^^^^^^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:291:28
[INFO] [stderr]     |
[INFO] [stderr] 291 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(PredictionModePriorType::Mnemonic, (context_map_type as usize,));
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:320:28
[INFO] [stderr]     |
[INFO] [stderr] 320 |                        let mut out_context_map = match context_map_type {
[INFO] [stderr]     |                            ----^^^^^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:343:24
[INFO] [stderr]     |
[INFO] [stderr] 343 |                    let mut nibble_prob = superstate.bk.prediction_priors.get(PredictionModePriorType::FirstNibble, (context_map_type as usize,));
[INFO] [stderr]     |                        ----^^^^^^^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:363:28
[INFO] [stderr]     |
[INFO] [stderr] 363 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(PredictionModePriorType::SecondNibble, (context_map_type as usize,));
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:371:24
[INFO] [stderr]     |
[INFO] [stderr] 371 |                    let mut out_context_map = match context_map_type {
[INFO] [stderr]     |                        ----^^^^^^^^^^^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:395:24
[INFO] [stderr]     |
[INFO] [stderr] 395 |                    let mut prior = if index >= 256 && self.pm.has_context_speeds() {
[INFO] [stderr]     |                        ----^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:401:28
[INFO] [stderr]     |
[INFO] [stderr] 401 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/codec/block_type.rs:72:25
[INFO] [stderr]    |
[INFO] [stderr] 72 |                     let mut nibble_prob = superstate.bk.btype_priors.get(BlockTypePriorType::Mnemonic,
[INFO] [stderr]    |                         ----^^^^^^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/codec/block_type.rs:88:25
[INFO] [stderr]    |
[INFO] [stderr] 88 |                     let mut nibble_prob = superstate.bk.btype_priors.get(BlockTypePriorType::FirstNibble,
[INFO] [stderr]    |                         ----^^^^^^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/codec/block_type.rs:97:25
[INFO] [stderr]    |
[INFO] [stderr] 97 |                     let mut nibble_prob = superstate.bk.btype_priors.get(BlockTypePriorType::SecondNibble,
[INFO] [stderr]    |                         ----^^^^^^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/block_type.rs:181:25
[INFO] [stderr]     |
[INFO] [stderr] 181 |                     let mut nibble_prob = superstate.bk.btype_priors.get(BlockTypePriorType::StrideNibble,
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/codec/copy.rs:91:25
[INFO] [stderr]    |
[INFO] [stderr] 91 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:112:25
[INFO] [stderr]     |
[INFO] [stderr] 112 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:129:25
[INFO] [stderr]     |
[INFO] [stderr] 129 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:145:25
[INFO] [stderr]     |
[INFO] [stderr] 145 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:175:29
[INFO] [stderr]     |
[INFO] [stderr] 175 |                         let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                             ----^^^^^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:204:25
[INFO] [stderr]     |
[INFO] [stderr] 204 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:231:25
[INFO] [stderr]     |
[INFO] [stderr] 231 |                     let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/copy.rs:250:33
[INFO] [stderr]     |
[INFO] [stderr] 250 |                             let mut nibble_prob = superstate.bk.copy_priors.get(
[INFO] [stderr]     |                                 ----^^^^^^^^^^^
[INFO] [stderr]     |                                 |
[INFO] [stderr]     |                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/codec/dict.rs:84:25
[INFO] [stderr]    |
[INFO] [stderr] 84 |                     let mut nibble_prob = superstate.bk.dict_priors.get(DictCommandNibblePriorType::SizeBegNib, (ctype,));
[INFO] [stderr]    |                         ----^^^^^^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/dict.rs:100:25
[INFO] [stderr]     |
[INFO] [stderr] 100 |                     let mut nibble_prob = superstate.bk.dict_priors.get(DictCommandNibblePriorType::SizeLastNib, (ctype,));
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/dict.rs:119:25
[INFO] [stderr]     |
[INFO] [stderr] 119 |                     let mut nibble_prob = superstate.bk.dict_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/dict.rs:139:25
[INFO] [stderr]     |
[INFO] [stderr] 139 |                     let mut nibble_prob = superstate.bk.dict_priors.get(DictCommandNibblePriorType::Transform,
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/dict.rs:150:25
[INFO] [stderr]     |
[INFO] [stderr] 150 |                     let mut nibble_prob = superstate.bk.dict_priors.get(DictCommandNibblePriorType::Transform,
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:294:16
[INFO] [stderr]     |
[INFO] [stderr] 294 |            let mut byte_to_encode_val = specialization.get_literal_byte(in_cmd,
[INFO] [stderr]     |                ----^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                |
[INFO] [stderr]     |                help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:572:25
[INFO] [stderr]     |
[INFO] [stderr] 572 |                     let mut nibble_prob = superstate.bk.lit_len_priors.get(
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:600:25
[INFO] [stderr]     |
[INFO] [stderr] 600 |                     let mut nibble_prob = superstate.bk.lit_len_priors.get(LiteralCommandPriorType::SizeBegNib, (ctype,));
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:625:25
[INFO] [stderr]     |
[INFO] [stderr] 625 |                     let mut nibble_prob = superstate.bk.lit_len_priors.get(LiteralCommandPriorType::SizeLastNib, (ctype,));
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:640:25
[INFO] [stderr]     |
[INFO] [stderr] 640 |                     let mut nibble_prob = superstate.bk.lit_len_priors.get(LiteralCommandPriorType::SizeMantissaNib, (ctype,));
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/literal.rs:707:30
[INFO] [stderr]     |
[INFO] [stderr] 707 |                         Some(mut lc) => {
[INFO] [stderr]     |                              ----^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:174:28
[INFO] [stderr]     |
[INFO] [stderr] 174 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(PredictionModePriorType::Only, (0,));
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:195:28
[INFO] [stderr]     |
[INFO] [stderr] 195 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:211:28
[INFO] [stderr]     |
[INFO] [stderr] 211 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:235:24
[INFO] [stderr]     |
[INFO] [stderr] 235 |                    let mut nibble_prob = superstate.bk.prediction_priors.get(PredictionModePriorType::ContextMapSpeedPalette,
[INFO] [stderr]     |                        ----^^^^^^^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:291:28
[INFO] [stderr]     |
[INFO] [stderr] 291 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(PredictionModePriorType::Mnemonic, (context_map_type as usize,));
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:320:28
[INFO] [stderr]     |
[INFO] [stderr] 320 |                        let mut out_context_map = match context_map_type {
[INFO] [stderr]     |                            ----^^^^^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:343:24
[INFO] [stderr]     |
[INFO] [stderr] 343 |                    let mut nibble_prob = superstate.bk.prediction_priors.get(PredictionModePriorType::FirstNibble, (context_map_type as usize,));
[INFO] [stderr]     |                        ----^^^^^^^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:363:28
[INFO] [stderr]     |
[INFO] [stderr] 363 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(PredictionModePriorType::SecondNibble, (context_map_type as usize,));
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:371:24
[INFO] [stderr]     |
[INFO] [stderr] 371 |                    let mut out_context_map = match context_map_type {
[INFO] [stderr]     |                        ----^^^^^^^^^^^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:395:24
[INFO] [stderr]     |
[INFO] [stderr] 395 |                    let mut prior = if index >= 256 && self.pm.has_context_speeds() {
[INFO] [stderr]     |                        ----^^^^^
[INFO] [stderr]     |                        |
[INFO] [stderr]     |                        help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/context_map.rs:401:28
[INFO] [stderr]     |
[INFO] [stderr] 401 |                        let mut nibble_prob = superstate.bk.prediction_priors.get(
[INFO] [stderr]     |                            ----^^^^^^^^^^^
[INFO] [stderr]     |                            |
[INFO] [stderr]     |                            help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/codec/block_type.rs:72:25
[INFO] [stderr]    |
[INFO] [stderr] 72 |                     let mut nibble_prob = superstate.bk.btype_priors.get(BlockTypePriorType::Mnemonic,
[INFO] [stderr]    |                         ----^^^^^^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/codec/block_type.rs:88:25
[INFO] [stderr]    |
[INFO] [stderr] 88 |                     let mut nibble_prob = superstate.bk.btype_priors.get(BlockTypePriorType::FirstNibble,
[INFO] [stderr]    |                         ----^^^^^^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/codec/block_type.rs:97:25
[INFO] [stderr]    |
[INFO] [stderr] 97 |                     let mut nibble_prob = superstate.bk.btype_priors.get(BlockTypePriorType::SecondNibble,
[INFO] [stderr]    |                         ----^^^^^^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/codec/block_type.rs:181:25
[INFO] [stderr]     |
[INFO] [stderr] 181 |                     let mut nibble_prob = superstate.bk.btype_priors.get(BlockTypePriorType::StrideNibble,
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/test_ans.rs:215:17
[INFO] [stderr]     |
[INFO] [stderr] 215 |             let mut q = e.get_internal_buffer_mut();
[INFO] [stderr]     |                 ----^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/test_ans.rs:237:13
[INFO] [stderr]     |
[INFO] [stderr] 237 |         let mut q = e.get_internal_buffer_mut();
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/test_ans.rs:317:17
[INFO] [stderr]     |
[INFO] [stderr] 317 |             let mut q = d.get_internal_buffer_mut();
[INFO] [stderr]     |                 ----^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/test_ans.rs:338:13
[INFO] [stderr]     |
[INFO] [stderr] 338 |         let mut q = d.get_internal_buffer_mut();
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/ir_optimize/mod.rs:198:21
[INFO] [stderr]     |
[INFO] [stderr] 198 |                 let mut should_merge = match should_merge(lit, copy, index, mb, &mut actuary, &mut distance_cache) {
[INFO] [stderr]     |                     ----^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/test_ans.rs:380:17
[INFO] [stderr]     |
[INFO] [stderr] 380 |             let mut q = e.get_internal_buffer_mut();
[INFO] [stderr]     |                 ----^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/test_ans.rs:443:17
[INFO] [stderr]     |
[INFO] [stderr] 443 |             let mut q = d.get_internal_buffer_mut();
[INFO] [stderr]     |                 ----^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/mux.rs:463:20
[INFO] [stderr]     |
[INFO] [stderr] 463 |                let mut is_lagging = max_flush  > MAX_FLUSH_VARIANCE + self.last_flush[index];
[INFO] [stderr]     |                    ----^^^^^^^^^^
[INFO] [stderr]     |                    |
[INFO] [stderr]     |                    help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/ir_optimize/mod.rs:198:21
[INFO] [stderr]     |
[INFO] [stderr] 198 |                 let mut should_merge = match should_merge(lit, copy, index, mb, &mut actuary, &mut distance_cache) {
[INFO] [stderr]     |                     ----^^^^^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/mux.rs:463:20
[INFO] [stderr]     |
[INFO] [stderr] 463 |                let mut is_lagging = max_flush  > MAX_FLUSH_VARIANCE + self.last_flush[index];
[INFO] [stderr]     |                    ----^^^^^^^^^^
[INFO] [stderr]     |                    |
[INFO] [stderr]     |                    help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/util_prior_stream_cost.rs:37:21
[INFO] [stderr]    |
[INFO] [stderr] 37 |                 let mut prior_val: Vec<String> = if let Some(_) = line.find(",") {
[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] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/util_prior_stream_cost.rs:65:21
[INFO] [stderr]    |
[INFO] [stderr] 65 |                 let mut prior_stream = &mut sub_streams.entry(prior).or_insert(vec::Vec::<u8>::new());
[INFO] [stderr]    |                     ----^^^^^^^^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.18s
[INFO] running `"docker" "inspect" "f2b66517b523b7f9da710a22bb9e8eff1e305d026085ecef2c5c41da3928b788"`
[INFO] running `"docker" "rm" "-f" "f2b66517b523b7f9da710a22bb9e8eff1e305d026085ecef2c5c41da3928b788"`
[INFO] [stdout] f2b66517b523b7f9da710a22bb9e8eff1e305d026085ecef2c5c41da3928b788