[INFO] crate nibble 0.1.0 is already in cache
[INFO] extracting crate nibble 0.1.0 into work/ex/pr-60466/sources/master#7840a0b753a065a41999f1fb6028f67d33e3fdd5/reg/nibble/0.1.0
[INFO] extracting crate nibble 0.1.0 into work/ex/pr-60466/sources/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853/reg/nibble/0.1.0
[INFO] validating manifest of nibble-0.1.0 on toolchain master#7840a0b753a065a41999f1fb6028f67d33e3fdd5
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+7840a0b753a065a41999f1fb6028f67d33e3fdd5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nibble-0.1.0 on toolchain try#6a9f0b6cc40687e25f9d772e3b10bab335c63853
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+6a9f0b6cc40687e25f9d772e3b10bab335c63853-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nibble-0.1.0
[INFO] finished frobbing nibble-0.1.0
[INFO] frobbed toml for nibble-0.1.0 written to work/ex/pr-60466/sources/master#7840a0b753a065a41999f1fb6028f67d33e3fdd5/reg/nibble/0.1.0/Cargo.toml
[INFO] started frobbing nibble-0.1.0
[INFO] finished frobbing nibble-0.1.0
[INFO] frobbed toml for nibble-0.1.0 written to work/ex/pr-60466/sources/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853/reg/nibble/0.1.0/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+7840a0b753a065a41999f1fb6028f67d33e3fdd5-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+6a9f0b6cc40687e25f9d772e3b10bab335c63853-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+7840a0b753a065a41999f1fb6028f67d33e3fdd5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+6a9f0b6cc40687e25f9d772e3b10bab335c63853-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking nibble-0.1.0 against try#6a9f0b6cc40687e25f9d772e3b10bab335c63853 for pr-60466
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60466/worker-6/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60466/sources/try#6a9f0b6cc40687e25f9d772e3b10bab335c63853/reg/nibble/0.1.0:/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" "+6a9f0b6cc40687e25f9d772e3b10bab335c63853-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 664a983762cecd25333f8b36078947d9bea789c2fe09a42c3955e3231cb039e9
[INFO] running `"docker" "start" "-a" "664a983762cecd25333f8b36078947d9bea789c2fe09a42c3955e3231cb039e9"`
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]     Checking nibble v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/common.rs:85:62
[INFO] [stderr]    |
[INFO] [stderr] 85 | pub(crate) fn get_nib_ref(slice: &[u4x2], nibidx: usize) -> &u4 {
[INFO] [stderr]    |                                                              ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr]    |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]   --> src/lib.rs:7:69
[INFO] [stderr]    |
[INFO] [stderr] 7  | #![cfg_attr(test, deny(missing_debug_implementations, missing_docs, warnings))]
[INFO] [stderr]    |                                                                     ^^^^^^^^
[INFO] [stderr]    = note: #[deny(bare_trait_objects)] implied by #[deny(warnings)]
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/common.rs:94:66
[INFO] [stderr]    |
[INFO] [stderr] 94 | pub(crate) fn get_nib_mut(slice: &mut [u4x2], nibidx: usize) -> &U4Cell {
[INFO] [stderr]    |                                                                  ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/array.rs:196:50
[INFO] [stderr]     |
[INFO] [stderr] 196 | impl<'a, A: Array<Item = u4x2>> FromIterator<&'a u4> for NibArrayVec<A> {
[INFO] [stderr]     |                                                  ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/array.rs:197:45
[INFO] [stderr]     |
[INFO] [stderr] 197 |     fn from_iter<I: IntoIterator<Item = &'a u4>>(iter: I) -> Self {
[INFO] [stderr]     |                                             ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/array.rs:217:44
[INFO] [stderr]     |
[INFO] [stderr] 217 | impl<'a, A: Array<Item = u4x2>> Extend<&'a u4> for NibArrayVec<A> {
[INFO] [stderr]     |                                            ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/array.rs:218:42
[INFO] [stderr]     |
[INFO] [stderr] 218 |     fn extend<I: IntoIterator<Item = &'a u4>>(&mut self, iter: I) {
[INFO] [stderr]     |                                          ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/base.rs:389:17
[INFO] [stderr]     |
[INFO] [stderr] 389 |         &lo as &u4;
[INFO] [stderr]     |                 ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/base.rs:390:17
[INFO] [stderr]     |
[INFO] [stderr] 390 |         &hi as &u4;
[INFO] [stderr]     |                 ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:141:21
[INFO] [stderr]     |
[INFO] [stderr] 141 |     type Item = &'a u4;
[INFO] [stderr]     |                     ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:142:38
[INFO] [stderr]     |
[INFO] [stderr] 142 |     fn next(&mut self) -> Option<&'a u4> {
[INFO] [stderr]     |                                      ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:163:43
[INFO] [stderr]     |
[INFO] [stderr] 163 |     fn next_back(&mut self) -> Option<&'a u4> {
[INFO] [stderr]     |                                           ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:212:21
[INFO] [stderr]     |
[INFO] [stderr] 212 |     type Item = &'a U4Cell;
[INFO] [stderr]     |                     ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:213:38
[INFO] [stderr]     |
[INFO] [stderr] 213 |     fn next(&mut self) -> Option<&'a U4Cell> {
[INFO] [stderr]     |                                      ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:234:43
[INFO] [stderr]     |
[INFO] [stderr] 234 |     fn next_back(&mut self) -> Option<&'a U4Cell> {
[INFO] [stderr]     |                                           ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:227:20
[INFO] [stderr]     |
[INFO] [stderr] 227 |     hi: Option<&'a u4>,
[INFO] [stderr]     |                    ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:228:20
[INFO] [stderr]     |
[INFO] [stderr] 228 |     lo: Option<&'a u4>,
[INFO] [stderr]     |                    ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:231:21
[INFO] [stderr]     |
[INFO] [stderr] 231 |     type Item = &'a u4;
[INFO] [stderr]     |                     ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:232:38
[INFO] [stderr]     |
[INFO] [stderr] 232 |     fn next(&mut self) -> Option<&'a u4> {
[INFO] [stderr]     |                                      ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:240:43
[INFO] [stderr]     |
[INFO] [stderr] 240 |     fn next_back(&mut self) -> Option<&'a u4> {
[INFO] [stderr]     |                                           ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:253:20
[INFO] [stderr]     |
[INFO] [stderr] 253 |     hi: Option<&'a U4Cell>,
[INFO] [stderr]     |                    ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:254:20
[INFO] [stderr]     |
[INFO] [stderr] 254 |     lo: Option<&'a U4Cell>,
[INFO] [stderr]     |                    ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:257:21
[INFO] [stderr]     |
[INFO] [stderr] 257 |     type Item = &'a U4Cell;
[INFO] [stderr]     |                     ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:258:38
[INFO] [stderr]     |
[INFO] [stderr] 258 |     fn next(&mut self) -> Option<&'a U4Cell> {
[INFO] [stderr]     |                                      ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:266:43
[INFO] [stderr]     |
[INFO] [stderr] 266 |     fn next_back(&mut self) -> Option<&'a U4Cell> {
[INFO] [stderr]     |                                           ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:296:26
[INFO] [stderr]     |
[INFO] [stderr] 296 |     fn swap(&self, nib: &U4Cell);
[INFO] [stderr]     |                          ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:327:26
[INFO] [stderr]     |
[INFO] [stderr] 327 |     fn swap(&self, nib: &U4Cell) {
[INFO] [stderr]     |                          ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:367:26
[INFO] [stderr]     |
[INFO] [stderr] 367 |     fn swap(&self, nib: &U4Cell) {
[INFO] [stderr]     |                          ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:386:27
[INFO] [stderr]     |
[INFO] [stderr] 386 |         byte.lo_mut() as &U4Cell;
[INFO] [stderr]     |                           ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:387:27
[INFO] [stderr]     |
[INFO] [stderr] 387 |         byte.hi_mut() as &U4Cell;
[INFO] [stderr]     |                           ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/slice.rs:66:35
[INFO] [stderr]    |
[INFO] [stderr] 66 |     fn get(&self, idx: usize) -> &u4 {
[INFO] [stderr]    |                                   ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] error: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/slice.rs:160:43
[INFO] [stderr]     |
[INFO] [stderr] 160 |     fn get_mut(&mut self, idx: usize) -> &U4Cell {
[INFO] [stderr]     |                                           ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/common.rs:85:62
[INFO] [stderr]    |
[INFO] [stderr] 85 | pub(crate) fn get_nib_ref(slice: &[u4x2], nibidx: usize) -> &u4 {
[INFO] [stderr]    |                                                              ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/common.rs:94:66
[INFO] [stderr]    |
[INFO] [stderr] 94 | pub(crate) fn get_nib_mut(slice: &mut [u4x2], nibidx: usize) -> &U4Cell {
[INFO] [stderr]    |                                                                  ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/array.rs:196:50
[INFO] [stderr]     |
[INFO] [stderr] 196 | impl<'a, A: Array<Item = u4x2>> FromIterator<&'a u4> for NibArrayVec<A> {
[INFO] [stderr]     |                                                  ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/array.rs:197:45
[INFO] [stderr]     |
[INFO] [stderr] 197 |     fn from_iter<I: IntoIterator<Item = &'a u4>>(iter: I) -> Self {
[INFO] [stderr]     |                                             ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/array.rs:217:44
[INFO] [stderr]     |
[INFO] [stderr] 217 | impl<'a, A: Array<Item = u4x2>> Extend<&'a u4> for NibArrayVec<A> {
[INFO] [stderr]     |                                            ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/array.rs:218:42
[INFO] [stderr]     |
[INFO] [stderr] 218 |     fn extend<I: IntoIterator<Item = &'a u4>>(&mut self, iter: I) {
[INFO] [stderr]     |                                          ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:141:21
[INFO] [stderr]     |
[INFO] [stderr] 141 |     type Item = &'a u4;
[INFO] [stderr]     |                     ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:142:38
[INFO] [stderr]     |
[INFO] [stderr] 142 |     fn next(&mut self) -> Option<&'a u4> {
[INFO] [stderr]     |                                      ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:163:43
[INFO] [stderr]     |
[INFO] [stderr] 163 |     fn next_back(&mut self) -> Option<&'a u4> {
[INFO] [stderr]     |                                           ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:212:21
[INFO] [stderr]     |
[INFO] [stderr] 212 |     type Item = &'a U4Cell;
[INFO] [stderr]     |                     ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:213:38
[INFO] [stderr]     |
[INFO] [stderr] 213 |     fn next(&mut self) -> Option<&'a U4Cell> {
[INFO] [stderr]     |                                      ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/iter.rs:234:43
[INFO] [stderr]     |
[INFO] [stderr] 234 |     fn next_back(&mut self) -> Option<&'a U4Cell> {
[INFO] [stderr]     |                                           ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:227:20
[INFO] [stderr]     |
[INFO] [stderr] 227 |     hi: Option<&'a u4>,
[INFO] [stderr]     |                    ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:228:20
[INFO] [stderr]     |
[INFO] [stderr] 228 |     lo: Option<&'a u4>,
[INFO] [stderr]     |                    ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:231:21
[INFO] [stderr]     |
[INFO] [stderr] 231 |     type Item = &'a u4;
[INFO] [stderr]     |                     ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:232:38
[INFO] [stderr]     |
[INFO] [stderr] 232 |     fn next(&mut self) -> Option<&'a u4> {
[INFO] [stderr]     |                                      ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:240:43
[INFO] [stderr]     |
[INFO] [stderr] 240 |     fn next_back(&mut self) -> Option<&'a u4> {
[INFO] [stderr]     |                                           ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:253:20
[INFO] [stderr]     |
[INFO] [stderr] 253 |     hi: Option<&'a U4Cell>,
[INFO] [stderr]     |                    ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:254:20
[INFO] [stderr]     |
[INFO] [stderr] 254 |     lo: Option<&'a U4Cell>,
[INFO] [stderr]     |                    ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:257:21
[INFO] [stderr]     |
[INFO] [stderr] 257 |     type Item = &'a U4Cell;
[INFO] [stderr]     |                     ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:258:38
[INFO] [stderr]     |
[INFO] [stderr] 258 |     fn next(&mut self) -> Option<&'a U4Cell> {
[INFO] [stderr]     |                                      ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:266:43
[INFO] [stderr]     |
[INFO] [stderr] 266 |     fn next_back(&mut self) -> Option<&'a U4Cell> {
[INFO] [stderr]     |                                           ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:296:26
[INFO] [stderr]     |
[INFO] [stderr] 296 |     fn swap(&self, nib: &U4Cell);
[INFO] [stderr]     |                          ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:327:26
[INFO] [stderr]     |
[INFO] [stderr] 327 |     fn swap(&self, nib: &U4Cell) {
[INFO] [stderr]     |                          ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/pair.rs:367:26
[INFO] [stderr]     |
[INFO] [stderr] 367 |     fn swap(&self, nib: &U4Cell) {
[INFO] [stderr]     |                          ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/slice.rs:66:35
[INFO] [stderr]    |
[INFO] [stderr] 66 |     fn get(&self, idx: usize) -> &u4 {
[INFO] [stderr]    |                                   ^^ help: use `dyn`: `dyn u4`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/slice.rs:160:43
[INFO] [stderr]     |
[INFO] [stderr] 160 |     fn get_mut(&mut self, idx: usize) -> &U4Cell {
[INFO] [stderr]     |                                           ^^^^^^ help: use `dyn`: `dyn U4Cell`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 31 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `nibble`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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:6:12
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![feature(try_from)]
[INFO] [stderr]   |            ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "664a983762cecd25333f8b36078947d9bea789c2fe09a42c3955e3231cb039e9"`
[INFO] running `"docker" "rm" "-f" "664a983762cecd25333f8b36078947d9bea789c2fe09a42c3955e3231cb039e9"`
[INFO] [stdout] 664a983762cecd25333f8b36078947d9bea789c2fe09a42c3955e3231cb039e9