[INFO] crate visit_diff 0.1.1 is already in cache
[INFO] extracting crate visit_diff 0.1.1 into work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/reg/visit_diff/0.1.1
[INFO] extracting crate visit_diff 0.1.1 into work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/visit_diff/0.1.1
[INFO] validating manifest of visit_diff-0.1.1 on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of visit_diff-0.1.1 on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing visit_diff-0.1.1
[INFO] finished frobbing visit_diff-0.1.1
[INFO] frobbed toml for visit_diff-0.1.1 written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/reg/visit_diff/0.1.1/Cargo.toml
[INFO] started frobbing visit_diff-0.1.1
[INFO] finished frobbing visit_diff-0.1.1
[INFO] frobbed toml for visit_diff-0.1.1 written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/reg/visit_diff/0.1.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking visit_diff-0.1.1 against master#452087b4bf18cece2d52d7cd8c9147195e5404bf for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-6/master#452087b4bf18cece2d52d7cd8c9147195e5404bf:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/reg/visit_diff/0.1.1:/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" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b2734e3dbfe09ca7b5ee5d17fc4c65a00a58e703ecde890ed233c5b7f84f5217
[INFO] running `"docker" "start" "-a" "b2734e3dbfe09ca7b5ee5d17fc4c65a00a58e703ecde890ed233c5b7f84f5217"`
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]    Compiling visit_diff_derive v0.1.0
[INFO] [stderr]     Checking visit_diff v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/debug.rs:25:29
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Debug`
[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/debug.rs:25:40
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/debug.rs:29:23
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn same(self, a: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/debug.rs:29:34
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn same(self, a: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/detect.rs:203:29
[INFO] [stderr]     |
[INFO] [stderr] 203 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/detect.rs:203:40
[INFO] [stderr]     |
[INFO] [stderr] 203 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/detect.rs:207:23
[INFO] [stderr]     |
[INFO] [stderr] 207 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/detect.rs:207:34
[INFO] [stderr]     |
[INFO] [stderr] 207 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/unit.rs:20:29
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/unit.rs:20:40
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/unit.rs:24:23
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/unit.rs:24:34
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constant.rs:42:29
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constant.rs:42:40
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constant.rs:46:23
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constant.rs:46:34
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/record.rs:115:29
[INFO] [stderr]     |
[INFO] [stderr] 115 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/record.rs:115:40
[INFO] [stderr]     |
[INFO] [stderr] 115 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/record.rs:119:23
[INFO] [stderr]     |
[INFO] [stderr] 119 |     fn same(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/record.rs:119:34
[INFO] [stderr]     |
[INFO] [stderr] 119 |     fn same(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:305:29
[INFO] [stderr]     |
[INFO] [stderr] 305 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err>;
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:305:40
[INFO] [stderr]     |
[INFO] [stderr] 305 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err>;
[INFO] [stderr]     |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:309:23
[INFO] [stderr]     |
[INFO] [stderr] 309 |     fn same(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err>;
[INFO] [stderr]     |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:309:34
[INFO] [stderr]     |
[INFO] [stderr] 309 |     fn same(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err>;
[INFO] [stderr]     |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/debug.rs:25:29
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Debug`
[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/debug.rs:25:40
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/debug.rs:29:23
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn same(self, a: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/debug.rs:29:34
[INFO] [stderr]    |
[INFO] [stderr] 29 |     fn same(self, a: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/detect.rs:203:29
[INFO] [stderr]     |
[INFO] [stderr] 203 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/detect.rs:203:40
[INFO] [stderr]     |
[INFO] [stderr] 203 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/detect.rs:207:23
[INFO] [stderr]     |
[INFO] [stderr] 207 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/detect.rs:207:34
[INFO] [stderr]     |
[INFO] [stderr] 207 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/unit.rs:20:29
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/unit.rs:20:40
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/unit.rs:24:23
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/unit.rs:24:34
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constant.rs:42:29
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constant.rs:42:40
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn difference(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constant.rs:46:23
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/constant.rs:46:34
[INFO] [stderr]    |
[INFO] [stderr] 46 |     fn same(self, _: &Debug, _: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]    |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/record.rs:115:29
[INFO] [stderr]     |
[INFO] [stderr] 115 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/record.rs:115:40
[INFO] [stderr]     |
[INFO] [stderr] 115 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/record.rs:119:23
[INFO] [stderr]     |
[INFO] [stderr] 119 |     fn same(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/record.rs:119:34
[INFO] [stderr]     |
[INFO] [stderr] 119 |     fn same(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err> {
[INFO] [stderr]     |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:305:29
[INFO] [stderr]     |
[INFO] [stderr] 305 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err>;
[INFO] [stderr]     |                             ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:305:40
[INFO] [stderr]     |
[INFO] [stderr] 305 |     fn difference(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err>;
[INFO] [stderr]     |                                        ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:309:23
[INFO] [stderr]     |
[INFO] [stderr] 309 |     fn same(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err>;
[INFO] [stderr]     |                       ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:309:34
[INFO] [stderr]     |
[INFO] [stderr] 309 |     fn same(self, a: &Debug, b: &Debug) -> Result<Self::Ok, Self::Err>;
[INFO] [stderr]     |                                  ^^^^^ help: use `dyn`: `dyn Debug`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.07s
[INFO] running `"docker" "inspect" "b2734e3dbfe09ca7b5ee5d17fc4c65a00a58e703ecde890ed233c5b7f84f5217"`
[INFO] running `"docker" "rm" "-f" "b2734e3dbfe09ca7b5ee5d17fc4c65a00a58e703ecde890ed233c5b7f84f5217"`
[INFO] [stdout] b2734e3dbfe09ca7b5ee5d17fc4c65a00a58e703ecde890ed233c5b7f84f5217