[INFO] crate shortcut 4.1.3 is already in cache
[INFO] testing shortcut-4.1.3 against 1.45.2 for beta-1.46-1
[INFO] extracting crate shortcut 4.1.3 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate shortcut 4.1.3 on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate shortcut 4.1.3
[INFO] finished tweaking crates.io crate shortcut 4.1.3
[INFO] tweaked toml for crates.io crate shortcut 4.1.3 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df2ff5a5ea3d3f16a1328854b788363966d9c7992afdd308b448b36957fdbfff
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "df2ff5a5ea3d3f16a1328854b788363966d9c7992afdd308b448b36957fdbfff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df2ff5a5ea3d3f16a1328854b788363966d9c7992afdd308b448b36957fdbfff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df2ff5a5ea3d3f16a1328854b788363966d9c7992afdd308b448b36957fdbfff", kill_on_drop: false }`
[INFO] [stdout] df2ff5a5ea3d3f16a1328854b788363966d9c7992afdd308b448b36957fdbfff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 14294ebad1d282ceac8aa9f010a9628c1c41ef84cfe96ba3d9f412dc4ebb6bb6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "14294ebad1d282ceac8aa9f010a9628c1c41ef84cfe96ba3d9f412dc4ebb6bb6", kill_on_drop: false }`
[INFO] [stderr]    Compiling shortcut v4.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/idx.rs:10:40
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn lookup<'a>(&'a self, &T) -> Box<Iterator<Item = usize> + 'a>;
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/idx.rs:41:45
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/idx.rs:86:59
[INFO] [stdout]    |
[INFO] [stdout] 86 |     fn between<'a>(&'a self, Bound<&T>, Bound<&T>) -> Box<Iterator<Item = usize> + 'a>;
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:107:45
[INFO] [stdout]     |
[INFO] [stdout] 107 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:132:69
[INFO] [stdout]     |
[INFO] [stdout] 132 |     fn between<'a>(&'a self, min: Bound<&T>, max: Bound<&T>) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]     |                                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:142:15
[INFO] [stdout]     |
[INFO] [stdout] 142 |     Range(Box<RangeIndex<T> + Send + Sync>),
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn RangeIndex<T> + Send + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:144:18
[INFO] [stdout]     |
[INFO] [stdout] 144 |     Equality(Box<EqualityIndex<T> + Send + Sync>),
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn EqualityIndex<T> + Send + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:148:45
[INFO] [stdout]     |
[INFO] [stdout] 148 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:100:39
[INFO] [stdout]     |
[INFO] [stdout] 100 | ...                   -> Box<Iterator<Item = usize> + 's> {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 's`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 42  | pub use idx::EqualityIndex;
[INFO] [stdout]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 102 |         use EqualityIndex;
[INFO] [stdout]     |             ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:132:36
[INFO] [stdout]     |
[INFO] [stdout] 132 | ...                   -> Box<Iterator<Item = &'s R> + 'c> {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = &'s R> + 'c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:182:17
[INFO] [stdout]     |
[INFO] [stdout] 42  | pub use idx::EqualityIndex;
[INFO] [stdout]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 182 |             use EqualityIndex;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:196:13
[INFO] [stdout]     |
[INFO] [stdout] 42  | pub use idx::EqualityIndex;
[INFO] [stdout]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 196 |         use EqualityIndex;
[INFO] [stdout]     |             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/idx.rs:55:21
[INFO] [stdout]    |
[INFO] [stdout] 55 |         if let Some(mut l) = self.map.get_mut(key) {
[INFO] [stdout]    |                     ----^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "14294ebad1d282ceac8aa9f010a9628c1c41ef84cfe96ba3d9f412dc4ebb6bb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "14294ebad1d282ceac8aa9f010a9628c1c41ef84cfe96ba3d9f412dc4ebb6bb6", kill_on_drop: false }`
[INFO] [stdout] 14294ebad1d282ceac8aa9f010a9628c1c41ef84cfe96ba3d9f412dc4ebb6bb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8eaf32ce3d194a6f1d4f63f1b787c04c2cd59d366ad6cee2d9bb5b0f1de41f12
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8eaf32ce3d194a6f1d4f63f1b787c04c2cd59d366ad6cee2d9bb5b0f1de41f12", kill_on_drop: false }`
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]    Compiling winapi v0.2.8
[INFO] [stderr]    Compiling utf8-ranges v0.1.3
[INFO] [stderr]    Compiling regex-syntax v0.3.9
[INFO] [stderr]    Compiling strsim v0.5.2
[INFO] [stderr]    Compiling lazy_static v0.2.11
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/idx.rs:10:40
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn lookup<'a>(&'a self, &T) -> Box<Iterator<Item = usize> + 'a>;
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/idx.rs:41:45
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/idx.rs:86:59
[INFO] [stdout]    |
[INFO] [stdout] 86 |     fn between<'a>(&'a self, Bound<&T>, Bound<&T>) -> Box<Iterator<Item = usize> + 'a>;
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:107:45
[INFO] [stdout]     |
[INFO] [stdout] 107 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:132:69
[INFO] [stdout]     |
[INFO] [stdout] 132 |     fn between<'a>(&'a self, min: Bound<&T>, max: Bound<&T>) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]     |                                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:142:15
[INFO] [stdout]     |
[INFO] [stdout] 142 |     Range(Box<RangeIndex<T> + Send + Sync>),
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn RangeIndex<T> + Send + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:144:18
[INFO] [stdout]     |
[INFO] [stdout] 144 |     Equality(Box<EqualityIndex<T> + Send + Sync>),
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn EqualityIndex<T> + Send + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:148:45
[INFO] [stdout]     |
[INFO] [stdout] 148 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:100:39
[INFO] [stdout]     |
[INFO] [stdout] 100 | ...                   -> Box<Iterator<Item = usize> + 's> {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 's`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 42  | pub use idx::EqualityIndex;
[INFO] [stdout]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 102 |         use EqualityIndex;
[INFO] [stdout]     |             ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:132:36
[INFO] [stdout]     |
[INFO] [stdout] 132 | ...                   -> Box<Iterator<Item = &'s R> + 'c> {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = &'s R> + 'c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:182:17
[INFO] [stdout]     |
[INFO] [stdout] 42  | pub use idx::EqualityIndex;
[INFO] [stdout]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 182 |             use EqualityIndex;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:196:13
[INFO] [stdout]     |
[INFO] [stdout] 42  | pub use idx::EqualityIndex;
[INFO] [stdout]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 196 |         use EqualityIndex;
[INFO] [stdout]     |             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/idx.rs:55:21
[INFO] [stdout]    |
[INFO] [stdout] 55 |         if let Some(mut l) = self.map.get_mut(key) {
[INFO] [stdout]    |                     ----^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling kernel32-sys v0.2.2
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling docopt v0.6.86
[INFO] [stderr]    Compiling shortcut v4.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/idx.rs:10:40
[INFO] [stdout]    |
[INFO] [stdout] 10 |     fn lookup<'a>(&'a self, &T) -> Box<Iterator<Item = usize> + 'a>;
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/idx.rs:41:45
[INFO] [stdout]    |
[INFO] [stdout] 41 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/idx.rs:86:59
[INFO] [stdout]    |
[INFO] [stdout] 86 |     fn between<'a>(&'a self, Bound<&T>, Bound<&T>) -> Box<Iterator<Item = usize> + 'a>;
[INFO] [stdout]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:107:45
[INFO] [stdout]     |
[INFO] [stdout] 107 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:132:69
[INFO] [stdout]     |
[INFO] [stdout] 132 |     fn between<'a>(&'a self, min: Bound<&T>, max: Bound<&T>) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]     |                                                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:142:15
[INFO] [stdout]     |
[INFO] [stdout] 142 |     Range(Box<RangeIndex<T> + Send + Sync>),
[INFO] [stdout]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn RangeIndex<T> + Send + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:144:18
[INFO] [stdout]     |
[INFO] [stdout] 144 |     Equality(Box<EqualityIndex<T> + Send + Sync>),
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn EqualityIndex<T> + Send + Sync`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/idx.rs:148:45
[INFO] [stdout]     |
[INFO] [stdout] 148 |     fn lookup<'a>(&'a self, key: &T) -> Box<Iterator<Item = usize> + 'a> {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 'a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:100:39
[INFO] [stdout]     |
[INFO] [stdout] 100 | ...                   -> Box<Iterator<Item = usize> + 's> {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = usize> + 's`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 42  | pub use idx::EqualityIndex;
[INFO] [stdout]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 102 |         use EqualityIndex;
[INFO] [stdout]     |             ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:132:36
[INFO] [stdout]     |
[INFO] [stdout] 132 | ...                   -> Box<Iterator<Item = &'s R> + 'c> {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = &'s R> + 'c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:182:17
[INFO] [stdout]     |
[INFO] [stdout] 42  | pub use idx::EqualityIndex;
[INFO] [stdout]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 182 |             use EqualityIndex;
[INFO] [stdout]     |                 ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `EqualityIndex` is imported redundantly
[INFO] [stdout]    --> src/lib.rs:196:13
[INFO] [stdout]     |
[INFO] [stdout] 42  | pub use idx::EqualityIndex;
[INFO] [stdout]     |         ------------------ the item `EqualityIndex` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 196 |         use EqualityIndex;
[INFO] [stdout]     |             ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/idx.rs:55:21
[INFO] [stdout]    |
[INFO] [stdout] 55 |         if let Some(mut l) = self.map.get_mut(key) {
[INFO] [stdout]    |                     ----^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 22.23s
[INFO] running `Command { std: "docker" "inspect" "8eaf32ce3d194a6f1d4f63f1b787c04c2cd59d366ad6cee2d9bb5b0f1de41f12", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eaf32ce3d194a6f1d4f63f1b787c04c2cd59d366ad6cee2d9bb5b0f1de41f12", kill_on_drop: false }`
[INFO] [stdout] 8eaf32ce3d194a6f1d4f63f1b787c04c2cd59d366ad6cee2d9bb5b0f1de41f12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 286e0194f4dff0acb57284331bc07b5ea643179a1c92a0d610c2388432b624aa
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "286e0194f4dff0acb57284331bc07b5ea643179a1c92a0d610c2388432b624aa", kill_on_drop: false }`
[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: 14 warnings emitted
[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: 14 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/shortcut-f82dfc564d99a71b
[INFO] [stdout] 
[INFO] [stdout] running 22 tests
[INFO] [stdout] test cmp::tests::cond_eq ... ok
[INFO] [stdout] test cmp::tests::display ... ok
[INFO] [stdout] test idx::tests::btree_range_index ... ok
[INFO] [stdout] test cmp::tests::through_deref ... ok
[INFO] [stdout] test tests::it_deletes ... ok
[INFO] [stdout] test idx::tests::hashmap_eq_index ... ok
[INFO] [stdout] test tests::it_deletes_with_indices ... ok
[INFO] [stdout] test tests::filtered_delete ... ok
[INFO] [stdout] test cmp::tests::borrowed_values ... ok
[INFO] [stdout] test cmp::tests::cmp_eq ... ok
[INFO] [stdout] test tests::is_send_sync ... ok
[INFO] [stdout] test cmp::tests::value ... ok
[INFO] [stdout] test idx::tests::btree_eq_index ... ok
[INFO] [stdout] test tests::it_deletes_with_filters ... ok
[INFO] [stdout] test tests::it_filters_with_partial_indices ... ok
[INFO] [stdout] test tests::it_filters ... ok
[INFO] [stdout] test tests::it_filters_with_late_indices ... ok
[INFO] [stdout] test tests::it_filters_with_indices ... ok
[INFO] [stdout] test tests::it_works_with_indices ... ok
[INFO] [stdout] test tests::it_works_w_non_vec ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test tests::it_deletes_with_partial_indices ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 22 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests shortcut
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "286e0194f4dff0acb57284331bc07b5ea643179a1c92a0d610c2388432b624aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "286e0194f4dff0acb57284331bc07b5ea643179a1c92a0d610c2388432b624aa", kill_on_drop: false }`
[INFO] [stdout] 286e0194f4dff0acb57284331bc07b5ea643179a1c92a0d610c2388432b624aa