[INFO] fetching crate game_kernel_utils 0.1.0...
[INFO] building game_kernel_utils-0.1.0 against master#ff34b919075f35a1787659e9c448a34b06bab8de for issue-85264
[INFO] extracting crate game_kernel_utils 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate game_kernel_utils 0.1.0 on toolchain ff34b919075f35a1787659e9c448a34b06bab8de
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate game_kernel_utils 0.1.0
[INFO] finished tweaking crates.io crate game_kernel_utils 0.1.0
[INFO] tweaked toml for crates.io crate game_kernel_utils 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "fetch" "--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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1794b3466ee3a3db58540a007dea43db2ef2264ca992b6a68a2e4b01e48a535d
[INFO] running `Command { std: "docker" "start" "-a" "1794b3466ee3a3db58540a007dea43db2ef2264ca992b6a68a2e4b01e48a535d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1794b3466ee3a3db58540a007dea43db2ef2264ca992b6a68a2e4b01e48a535d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1794b3466ee3a3db58540a007dea43db2ef2264ca992b6a68a2e4b01e48a535d", kill_on_drop: false }`
[INFO] [stdout] 1794b3466ee3a3db58540a007dea43db2ef2264ca992b6a68a2e4b01e48a535d
[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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3221cd0746ea6c1bf8832d367e8c05255184d05f3cef32da2781461a5391f501
[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" "3221cd0746ea6c1bf8832d367e8c05255184d05f3cef32da2781461a5391f501", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling cgmath v0.17.0
[INFO] [stderr]    Compiling hashbag v0.1.3
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]    Compiling evmap v10.0.2
[INFO] [stderr]    Compiling lock_api v0.1.5
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling parking_lot v0.6.4
[INFO] [stderr]    Compiling game_kernel_utils v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self::evmap::ShallowCopy`
[INFO] [stdout]  --> src/hierarchy.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use self::evmap::ShallowCopy;
[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/hierarchy.rs:116:25
[INFO] [stdout]     |
[INFO] [stdout] 116 |         pre_op: Option<&Fn(&Keytype) -> Result<(), E>>,
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Keytype) -> Result<(), E>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/hierarchy.rs:117:26
[INFO] [stdout]     |
[INFO] [stdout] 117 |         post_op: Option<&Fn(&Keytype) -> Result<(), E>>,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Keytype) -> Result<(), E>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/hierarchy.rs:149:22
[INFO] [stdout]     |
[INFO] [stdout] 149 |         on_removed: &Fn(&Keytype),
[INFO] [stdout]     |                      ^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Keytype)`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/lib.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | /     fn get<Q: Sized>(&self, k: &Q) -> Option<&V>
[INFO] [stdout] 83 | |     where
[INFO] [stdout] 84 | |         Self: Sized,
[INFO] [stdout] 85 | |     {
[INFO] [stdout] 86 | |         self.get(k)
[INFO] [stdout]    | |         ----------- recursive call site
[INFO] [stdout] 87 | |     }
[INFO] [stdout]    | |_____^ cannot return without recursing
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/lib.rs:89:5
[INFO] [stdout]    |
[INFO] [stdout] 89 | /     fn get_mut<Q: Sized>(&mut self, k: &Q) -> Option<&mut V>
[INFO] [stdout] 90 | |     where
[INFO] [stdout] 91 | |         Self: Sized,
[INFO] [stdout] 92 | |     {
[INFO] [stdout] 93 | |         self.get_mut(k)
[INFO] [stdout]    | |         --------------- recursive call site
[INFO] [stdout] 94 | |     }
[INFO] [stdout]    | |_____^ cannot return without recursing
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hierarchy.rs:32:17
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let (r, mut w) = evmap::new();
[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: unused `Result` that must be used
[INFO] [stdout]    --> src/hierarchy.rs:135:13
[INFO] [stdout]     |
[INFO] [stdout] 135 |             recursive_op(hierarchy, child, pre_op, post_op);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.07s
[INFO] running `Command { std: "docker" "inspect" "3221cd0746ea6c1bf8832d367e8c05255184d05f3cef32da2781461a5391f501", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3221cd0746ea6c1bf8832d367e8c05255184d05f3cef32da2781461a5391f501", kill_on_drop: false }`
[INFO] [stdout] 3221cd0746ea6c1bf8832d367e8c05255184d05f3cef32da2781461a5391f501
[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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ff34b919075f35a1787659e9c448a34b06bab8de" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0e6914805688aa603fb8e01c9e02ace16bf6a83e484721fea5e403824932d36c
[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" "0e6914805688aa603fb8e01c9e02ace16bf6a83e484721fea5e403824932d36c", kill_on_drop: false }`
[INFO] [stderr]    Compiling game_kernel_utils v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `self::evmap::ShallowCopy`
[INFO] [stdout]  --> src/hierarchy.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use self::evmap::ShallowCopy;
[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/hierarchy.rs:116:25
[INFO] [stdout]     |
[INFO] [stdout] 116 |         pre_op: Option<&Fn(&Keytype) -> Result<(), E>>,
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Keytype) -> Result<(), E>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/hierarchy.rs:117:26
[INFO] [stdout]     |
[INFO] [stdout] 117 |         post_op: Option<&Fn(&Keytype) -> Result<(), E>>,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Keytype) -> Result<(), E>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/hierarchy.rs:149:22
[INFO] [stdout]     |
[INFO] [stdout] 149 |         on_removed: &Fn(&Keytype),
[INFO] [stdout]     |                      ^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Keytype)`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/lib.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | /     fn get<Q: Sized>(&self, k: &Q) -> Option<&V>
[INFO] [stdout] 83 | |     where
[INFO] [stdout] 84 | |         Self: Sized,
[INFO] [stdout] 85 | |     {
[INFO] [stdout] 86 | |         self.get(k)
[INFO] [stdout]    | |         ----------- recursive call site
[INFO] [stdout] 87 | |     }
[INFO] [stdout]    | |_____^ cannot return without recursing
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/lib.rs:89:5
[INFO] [stdout]    |
[INFO] [stdout] 89 | /     fn get_mut<Q: Sized>(&mut self, k: &Q) -> Option<&mut V>
[INFO] [stdout] 90 | |     where
[INFO] [stdout] 91 | |         Self: Sized,
[INFO] [stdout] 92 | |     {
[INFO] [stdout] 93 | |         self.get_mut(k)
[INFO] [stdout]    | |         --------------- recursive call site
[INFO] [stdout] 94 | |     }
[INFO] [stdout]    | |_____^ cannot return without recursing
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hierarchy.rs:32:17
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let (r, mut w) = evmap::new();
[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: unused `Result` that must be used
[INFO] [stdout]    --> src/hierarchy.rs:135:13
[INFO] [stdout]     |
[INFO] [stdout] 135 |             recursive_op(hierarchy, child, pre_op, post_op);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::evmap::ShallowCopy`
[INFO] [stdout]  --> src/hierarchy.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use self::evmap::ShallowCopy;
[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/hierarchy.rs:116:25
[INFO] [stdout]     |
[INFO] [stdout] 116 |         pre_op: Option<&Fn(&Keytype) -> Result<(), E>>,
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Keytype) -> Result<(), E>`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/hierarchy.rs:117:26
[INFO] [stdout]     |
[INFO] [stdout] 117 |         post_op: Option<&Fn(&Keytype) -> Result<(), E>>,
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Keytype) -> Result<(), E>`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/hierarchy.rs:149:22
[INFO] [stdout]     |
[INFO] [stdout] 149 |         on_removed: &Fn(&Keytype),
[INFO] [stdout]     |                      ^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Keytype)`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]     = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/lib.rs:82:5
[INFO] [stdout]    |
[INFO] [stdout] 82 | /     fn get<Q: Sized>(&self, k: &Q) -> Option<&V>
[INFO] [stdout] 83 | |     where
[INFO] [stdout] 84 | |         Self: Sized,
[INFO] [stdout] 85 | |     {
[INFO] [stdout] 86 | |         self.get(k)
[INFO] [stdout]    | |         ----------- recursive call site
[INFO] [stdout] 87 | |     }
[INFO] [stdout]    | |_____^ cannot return without recursing
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]   --> src/lib.rs:89:5
[INFO] [stdout]    |
[INFO] [stdout] 89 | /     fn get_mut<Q: Sized>(&mut self, k: &Q) -> Option<&mut V>
[INFO] [stdout] 90 | |     where
[INFO] [stdout] 91 | |         Self: Sized,
[INFO] [stdout] 92 | |     {
[INFO] [stdout] 93 | |         self.get_mut(k)
[INFO] [stdout]    | |         --------------- recursive call site
[INFO] [stdout] 94 | |     }
[INFO] [stdout]    | |_____^ cannot return without recursing
[INFO] [stdout]    |
[INFO] [stdout]    = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/hierarchy.rs:32:17
[INFO] [stdout]    |
[INFO] [stdout] 32 |         let (r, mut w) = evmap::new();
[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: unused `Result` that must be used
[INFO] [stdout]    --> src/hierarchy.rs:135:13
[INFO] [stdout]     |
[INFO] [stdout] 135 |             recursive_op(hierarchy, child, pre_op, post_op);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "0e6914805688aa603fb8e01c9e02ace16bf6a83e484721fea5e403824932d36c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0e6914805688aa603fb8e01c9e02ace16bf6a83e484721fea5e403824932d36c", kill_on_drop: false }`
[INFO] [stdout] 0e6914805688aa603fb8e01c9e02ace16bf6a83e484721fea5e403824932d36c
