[INFO] crate shortcut 4.1.3 is already in cache
[INFO] extracting crate shortcut 4.1.3 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/shortcut/4.1.3
[INFO] extracting crate shortcut 4.1.3 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/shortcut/4.1.3
[INFO] validating manifest of shortcut-4.1.3 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of shortcut-4.1.3 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing shortcut-4.1.3
[INFO] finished frobbing shortcut-4.1.3
[INFO] frobbed toml for shortcut-4.1.3 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/shortcut/4.1.3/Cargo.toml
[INFO] started frobbing shortcut-4.1.3
[INFO] finished frobbing shortcut-4.1.3
[INFO] frobbed toml for shortcut-4.1.3 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/shortcut/4.1.3/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking shortcut-4.1.3 against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-3/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/shortcut/4.1.3:/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" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] cf9816e41b31b8550b6871b5ad5ec78ac291c2036d62b9954eab5f69c94740f3
[INFO] running `"docker" "start" "-a" "cf9816e41b31b8550b6871b5ad5ec78ac291c2036d62b9954eab5f69c94740f3"`
[INFO] [stderr]     Checking shortcut v4.1.3 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/idx.rs:10:40
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn lookup<'a>(&'a self, &T) -> Box<Iterator<Item = usize> + 'a>;
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[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/idx.rs:41:45
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stderr]    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/idx.rs:86:59
[INFO] [stderr]    |
[INFO] [stderr] 86 |     fn between<'a>(&'a self, Bound<&T>, Bound<&T>) -> Box<Iterator<Item = usize> + 'a>;
[INFO] [stderr]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/idx.rs:107:45
[INFO] [stderr]     |
[INFO] [stderr] 107 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/idx.rs:132:69
[INFO] [stderr]     |
[INFO] [stderr] 132 |     fn between<'a>(&'a self, min: Bound<&T>, max: Bound<&T>) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stderr]     |                                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/idx.rs:142:15
[INFO] [stderr]     |
[INFO] [stderr] 142 |     Range(Box<RangeIndex<T> + Send + Sync>),
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn RangeIndex<T> + Send + Sync`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/idx.rs:144:18
[INFO] [stderr]     |
[INFO] [stderr] 144 |     Equality(Box<EqualityIndex<T> + Send + Sync>),
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn EqualityIndex<T> + Send + Sync`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/idx.rs:148:45
[INFO] [stderr]     |
[INFO] [stderr] 148 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:100:39
[INFO] [stderr]     |
[INFO] [stderr] 100 |                                -> Box<Iterator<Item = usize> + 's> {
[INFO] [stderr]     |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 's`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:102:13
[INFO] [stderr]     |
[INFO] [stderr] 42  | pub use idx::EqualityIndex;
[INFO] [stderr]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 102 |         use EqualityIndex;
[INFO] [stderr]     |             ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:132:36
[INFO] [stderr]     |
[INFO] [stderr] 132 |                             -> Box<Iterator<Item = &'s R> + 'c> {
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = &'s R> + 'c`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:182:17
[INFO] [stderr]     |
[INFO] [stderr] 42  | pub use idx::EqualityIndex;
[INFO] [stderr]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 182 |             use EqualityIndex;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:196:13
[INFO] [stderr]     |
[INFO] [stderr] 42  | pub use idx::EqualityIndex;
[INFO] [stderr]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 196 |         use EqualityIndex;
[INFO] [stderr]     |             ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/idx.rs:10:40
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn lookup<'a>(&'a self, &T) -> Box<Iterator<Item = usize> + 'a>;
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[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/idx.rs:41:45
[INFO] [stderr]    |
[INFO] [stderr] 41 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stderr]    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/idx.rs:86:59
[INFO] [stderr]    |
[INFO] [stderr] 86 |     fn between<'a>(&'a self, Bound<&T>, Bound<&T>) -> Box<Iterator<Item = usize> + 'a>;
[INFO] [stderr]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/idx.rs:107:45
[INFO] [stderr]     |
[INFO] [stderr] 107 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/idx.rs:132:69
[INFO] [stderr]     |
[INFO] [stderr] 132 |     fn between<'a>(&'a self, min: Bound<&T>, max: Bound<&T>) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stderr]     |                                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/idx.rs:142:15
[INFO] [stderr]     |
[INFO] [stderr] 142 |     Range(Box<RangeIndex<T> + Send + Sync>),
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn RangeIndex<T> + Send + Sync`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/idx.rs:144:18
[INFO] [stderr]     |
[INFO] [stderr] 144 |     Equality(Box<EqualityIndex<T> + Send + Sync>),
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn EqualityIndex<T> + Send + Sync`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/idx.rs:148:45
[INFO] [stderr]     |
[INFO] [stderr] 148 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:100:39
[INFO] [stderr]     |
[INFO] [stderr] 100 |                                -> Box<Iterator<Item = usize> + 's> {
[INFO] [stderr]     |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 's`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:102:13
[INFO] [stderr]     |
[INFO] [stderr] 42  | pub use idx::EqualityIndex;
[INFO] [stderr]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 102 |         use EqualityIndex;
[INFO] [stderr]     |             ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/lib.rs:132:36
[INFO] [stderr]     |
[INFO] [stderr] 132 |                             -> Box<Iterator<Item = &'s R> + 'c> {
[INFO] [stderr]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = &'s R> + 'c`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:182:17
[INFO] [stderr]     |
[INFO] [stderr] 42  | pub use idx::EqualityIndex;
[INFO] [stderr]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 182 |             use EqualityIndex;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stderr]    --> src/lib.rs:196:13
[INFO] [stderr]     |
[INFO] [stderr] 42  | pub use idx::EqualityIndex;
[INFO] [stderr]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 196 |         use EqualityIndex;
[INFO] [stderr]     |             ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/idx.rs:55:21
[INFO] [stderr]    |
[INFO] [stderr] 55 |         if let Some(mut l) = self.map.get_mut(key) {
[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/idx.rs:55:21
[INFO] [stderr]    |
[INFO] [stderr] 55 |         if let Some(mut l) = self.map.get_mut(key) {
[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] error[E0308]: mismatched types
[INFO] [stderr]   --> benches/bench.rs:62:59
[INFO] [stderr]    |
[INFO] [stderr] 62 |             cmp: cmp::Comparison::Equal(cmp::Value::Const(format!("{}", i))),
[INFO] [stderr]    |                                                           ^^^^^^^^^^^^^^^^ expected enum `std::borrow::Cow`, found struct `std::string::String`
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `std::borrow::Cow<'_, _>`
[INFO] [stderr]               found type `std::string::String`
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0308`.
[INFO] [stderr] error: Could not compile `shortcut`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "cf9816e41b31b8550b6871b5ad5ec78ac291c2036d62b9954eab5f69c94740f3"`
[INFO] running `"docker" "rm" "-f" "cf9816e41b31b8550b6871b5ad5ec78ac291c2036d62b9954eab5f69c94740f3"`
[INFO] [stdout] cf9816e41b31b8550b6871b5ad5ec78ac291c2036d62b9954eab5f69c94740f3