[INFO] fetching crate frond 0.1.1...
[INFO] testing frond-0.1.1 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] extracting crate frond 0.1.1 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate frond 0.1.1
[INFO] finished tweaking crates.io crate frond 0.1.1
[INFO] tweaked toml for crates.io crate frond 0.1.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate frond 0.1.1 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate frond 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6a72448017bc3d71e07496dd0e9c1226f504205a5fb6c780040ff67c0973afa9
[INFO] running `Command { std: "docker" "start" "-a" "6a72448017bc3d71e07496dd0e9c1226f504205a5fb6c780040ff67c0973afa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6a72448017bc3d71e07496dd0e9c1226f504205a5fb6c780040ff67c0973afa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a72448017bc3d71e07496dd0e9c1226f504205a5fb6c780040ff67c0973afa9", kill_on_drop: false }`
[INFO] [stdout] 6a72448017bc3d71e07496dd0e9c1226f504205a5fb6c780040ff67c0973afa9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f85a277dfec389c34ec8567dd375e37d56dd06a2b06655443aeb709af28fd367
[INFO] running `Command { std: "docker" "start" "-a" "f85a277dfec389c34ec8567dd375e37d56dd06a2b06655443aeb709af28fd367", kill_on_drop: false }`
[INFO] [stderr]    Compiling frond v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/composite.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |           let mut ret = todo!();
[INFO] [stdout]    |                         ------- any code following this expression is unreachable
[INFO] [stdout] 68 |
[INFO] [stdout] 69 | /         for (key, value) in iter {
[INFO] [stdout] 70 | |             self.assert_key_in_bounds(key);
[INFO] [stdout] 71 | |             todo!()
[INFO] [stdout] 72 | |         }
[INFO] [stdout]    | |_________^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iter`
[INFO] [stdout]   --> src/composite.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         iter: I,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ret`
[INFO] [stdout]   --> src/composite.rs:67:13
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let mut ret = todo!();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ret`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/composite.rs:69:14
[INFO] [stdout]    |
[INFO] [stdout] 69 |         for (key, value) in iter {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/composite.rs:69:19
[INFO] [stdout]    |
[INFO] [stdout] 69 |         for (key, value) in iter {
[INFO] [stdout]    |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]   --> src/composite.rs:85:25
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn merge(&self, rhs: &Composite<A, B>) -> Composite<A, B> {
[INFO] [stdout]    |                         ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> src/composite.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         start: std::ops::Bound<&[u8]>,
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]   --> src/composite.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |         end: std::ops::Bound<&[u8]>,
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/composite.rs:97:36
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn assert_key_in_bounds(&self, key: Key) {
[INFO] [stdout]    |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]    --> src/lib.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 | /     fn range<'a>(
[INFO] [stdout] 102 | |         &'a self,
[INFO] [stdout] 103 | |         start: std::ops::Bound<&[u8]>,
[INFO] [stdout] 104 | |         end: std::ops::Bound<&[u8]>,
[INFO] [stdout] 105 | |     ) -> Self::Iter<'a> {
[INFO] [stdout]     | |_______________________^ cannot return without recursing
[INFO] [stdout] 106 |           Composite::range(self, start, end)
[INFO] [stdout]     |           ---------------------------------- recursive call site
[INFO] [stdout]     |
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inner` is never read
[INFO] [stdout]  --> src/composite.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Iter<'a, A: Interface, B: Interface> {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 9 |     inner: &'a Composite<A, B>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `merge_threshold` is never read
[INFO] [stdout]   --> src/composite.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Composite<A: Interface, B: Interface> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 31 |     merge_threshold: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Composite` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `range` is never used
[INFO] [stdout]   --> src/composite.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl<A: Interface, B: Interface> Composite<A, B> {
[INFO] [stdout]    | ------------------------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 89 |     fn range<'a>(
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn get(&self, key: Key) -> Option<Value>;
[INFO] [stdout]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |            |
[INFO] [stdout]    |            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn get(&self, key: Key) -> Option<Value<'_>>;
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn insert(&self, key: Key, value: Value) -> (Option<Value>, Self) {
[INFO] [stdout]    |               ^^^^^ the lifetime is elided here         ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn insert(&self, key: Key, value: Value) -> (Option<Value<'_>>, Self) {
[INFO] [stdout]    |                                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:45:15
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn remove(&self, key: Key) -> (Option<Value>, Self) {
[INFO] [stdout]    |               ^^^^^                       ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |               |
[INFO] [stdout]    |               the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn remove(&self, key: Key) -> (Option<Value<'_>>, Self) {
[INFO] [stdout]    |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |            |
[INFO] [stdout]    |            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |            |
[INFO] [stdout]    |            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/composite.rs:52:16
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |                ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/naive.rs:45:16
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |                ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "f85a277dfec389c34ec8567dd375e37d56dd06a2b06655443aeb709af28fd367", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f85a277dfec389c34ec8567dd375e37d56dd06a2b06655443aeb709af28fd367", kill_on_drop: false }`
[INFO] [stdout] f85a277dfec389c34ec8567dd375e37d56dd06a2b06655443aeb709af28fd367
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fdf514aed2307b7f382df55938319bdcefb61b8d911b4281d76d48eee1f410dd
[INFO] running `Command { std: "docker" "start" "-a" "fdf514aed2307b7f382df55938319bdcefb61b8d911b4281d76d48eee1f410dd", kill_on_drop: false }`
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/composite.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |           let mut ret = todo!();
[INFO] [stdout]    |                         ------- any code following this expression is unreachable
[INFO] [stdout] 68 |
[INFO] [stdout] 69 | /         for (key, value) in iter {
[INFO] [stdout] 70 | |             self.assert_key_in_bounds(key);
[INFO] [stdout] 71 | |             todo!()
[INFO] [stdout] 72 | |         }
[INFO] [stdout]    | |_________^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iter`
[INFO] [stdout]   --> src/composite.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         iter: I,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ret`
[INFO] [stdout]   --> src/composite.rs:67:13
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let mut ret = todo!();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ret`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/composite.rs:69:14
[INFO] [stdout]    |
[INFO] [stdout] 69 |         for (key, value) in iter {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/composite.rs:69:19
[INFO] [stdout]    |
[INFO] [stdout] 69 |         for (key, value) in iter {
[INFO] [stdout]    |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]   --> src/composite.rs:85:25
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn merge(&self, rhs: &Composite<A, B>) -> Composite<A, B> {
[INFO] [stdout]    |                         ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> src/composite.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         start: std::ops::Bound<&[u8]>,
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]   --> src/composite.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |         end: std::ops::Bound<&[u8]>,
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/composite.rs:97:36
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn assert_key_in_bounds(&self, key: Key) {
[INFO] [stdout]    |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]    --> src/lib.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 | /     fn range<'a>(
[INFO] [stdout] 102 | |         &'a self,
[INFO] [stdout] 103 | |         start: std::ops::Bound<&[u8]>,
[INFO] [stdout] 104 | |         end: std::ops::Bound<&[u8]>,
[INFO] [stdout] 105 | |     ) -> Self::Iter<'a> {
[INFO] [stdout]     | |_______________________^ cannot return without recursing
[INFO] [stdout] 106 |           Composite::range(self, start, end)
[INFO] [stdout]     |           ---------------------------------- recursive call site
[INFO] [stdout]     |
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inner` is never read
[INFO] [stdout]  --> src/composite.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Iter<'a, A: Interface, B: Interface> {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 9 |     inner: &'a Composite<A, B>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `merge_threshold` is never read
[INFO] [stdout]   --> src/composite.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Composite<A: Interface, B: Interface> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 31 |     merge_threshold: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Composite` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `range` is never used
[INFO] [stdout]   --> src/composite.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl<A: Interface, B: Interface> Composite<A, B> {
[INFO] [stdout]    | ------------------------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 89 |     fn range<'a>(
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn get(&self, key: Key) -> Option<Value>;
[INFO] [stdout]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |            |
[INFO] [stdout]    |            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn get(&self, key: Key) -> Option<Value<'_>>;
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling frond v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn insert(&self, key: Key, value: Value) -> (Option<Value>, Self) {
[INFO] [stdout]    |               ^^^^^ the lifetime is elided here         ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn insert(&self, key: Key, value: Value) -> (Option<Value<'_>>, Self) {
[INFO] [stdout]    |                                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:45:15
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn remove(&self, key: Key) -> (Option<Value>, Self) {
[INFO] [stdout]    |               ^^^^^                       ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |               |
[INFO] [stdout]    |               the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn remove(&self, key: Key) -> (Option<Value<'_>>, Self) {
[INFO] [stdout]    |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |            |
[INFO] [stdout]    |            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |            |
[INFO] [stdout]    |            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/composite.rs:52:16
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |                ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/naive.rs:45:16
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |                ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/composite.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |           let mut ret = todo!();
[INFO] [stdout]    |                         ------- any code following this expression is unreachable
[INFO] [stdout] 68 |
[INFO] [stdout] 69 | /         for (key, value) in iter {
[INFO] [stdout] 70 | |             self.assert_key_in_bounds(key);
[INFO] [stdout] 71 | |             todo!()
[INFO] [stdout] 72 | |         }
[INFO] [stdout]    | |_________^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iter`
[INFO] [stdout]   --> src/composite.rs:65:9
[INFO] [stdout]    |
[INFO] [stdout] 65 |         iter: I,
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ret`
[INFO] [stdout]   --> src/composite.rs:67:13
[INFO] [stdout]    |
[INFO] [stdout] 67 |         let mut ret = todo!();
[INFO] [stdout]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ret`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/composite.rs:69:14
[INFO] [stdout]    |
[INFO] [stdout] 69 |         for (key, value) in iter {
[INFO] [stdout]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/composite.rs:69:19
[INFO] [stdout]    |
[INFO] [stdout] 69 |         for (key, value) in iter {
[INFO] [stdout]    |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]   --> src/composite.rs:85:25
[INFO] [stdout]    |
[INFO] [stdout] 85 |     pub fn merge(&self, rhs: &Composite<A, B>) -> Composite<A, B> {
[INFO] [stdout]    |                         ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `start`
[INFO] [stdout]   --> src/composite.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |         start: std::ops::Bound<&[u8]>,
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `end`
[INFO] [stdout]   --> src/composite.rs:92:9
[INFO] [stdout]    |
[INFO] [stdout] 92 |         end: std::ops::Bound<&[u8]>,
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/composite.rs:97:36
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn assert_key_in_bounds(&self, key: Key) {
[INFO] [stdout]    |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function cannot return without recursing
[INFO] [stdout]    --> src/lib.rs:101:5
[INFO] [stdout]     |
[INFO] [stdout] 101 | /     fn range<'a>(
[INFO] [stdout] 102 | |         &'a self,
[INFO] [stdout] 103 | |         start: std::ops::Bound<&[u8]>,
[INFO] [stdout] 104 | |         end: std::ops::Bound<&[u8]>,
[INFO] [stdout] 105 | |     ) -> Self::Iter<'a> {
[INFO] [stdout]     | |_______________________^ cannot return without recursing
[INFO] [stdout] 106 |           Composite::range(self, start, end)
[INFO] [stdout]     |           ---------------------------------- recursive call site
[INFO] [stdout]     |
[INFO] [stdout]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stdout]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inner` is never read
[INFO] [stdout]  --> src/composite.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Iter<'a, A: Interface, B: Interface> {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 9 |     inner: &'a Composite<A, B>,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `merge_threshold` is never read
[INFO] [stdout]   --> src/composite.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub struct Composite<A: Interface, B: Interface> {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 31 |     merge_threshold: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Composite` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `range` is never used
[INFO] [stdout]   --> src/composite.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl<A: Interface, B: Interface> Composite<A, B> {
[INFO] [stdout]    | ------------------------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 89 |     fn range<'a>(
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:20:12
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn get(&self, key: Key) -> Option<Value>;
[INFO] [stdout]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |            |
[INFO] [stdout]    |            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn get(&self, key: Key) -> Option<Value<'_>>;
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn insert(&self, key: Key, value: Value) -> (Option<Value>, Self) {
[INFO] [stdout]    |               ^^^^^ the lifetime is elided here         ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn insert(&self, key: Key, value: Value) -> (Option<Value<'_>>, Self) {
[INFO] [stdout]    |                                                              ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:45:15
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn remove(&self, key: Key) -> (Option<Value>, Self) {
[INFO] [stdout]    |               ^^^^^                       ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |               |
[INFO] [stdout]    |               the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn remove(&self, key: Key) -> (Option<Value<'_>>, Self) {
[INFO] [stdout]    |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:69:12
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |            |
[INFO] [stdout]    |            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 69 |     fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/lib.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |            |
[INFO] [stdout]    |            the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/composite.rs:52:16
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |                ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/naive.rs:45:16
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get(&self, key: Key) -> Option<Value> {
[INFO] [stdout]    |                ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                |
[INFO] [stdout]    |                the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 45 |     pub fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stdout]    |                                                ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "fdf514aed2307b7f382df55938319bdcefb61b8d911b4281d76d48eee1f410dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdf514aed2307b7f382df55938319bdcefb61b8d911b4281d76d48eee1f410dd", kill_on_drop: false }`
[INFO] [stdout] fdf514aed2307b7f382df55938319bdcefb61b8d911b4281d76d48eee1f410dd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d801836b54e65ba42cbbeafbb4d53350aecf35edb3ac247b311efde0e85b0bcb
[INFO] running `Command { std: "docker" "start" "-a" "d801836b54e65ba42cbbeafbb4d53350aecf35edb3ac247b311efde0e85b0bcb", kill_on_drop: false }`
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/composite.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |           let mut ret = todo!();
[INFO] [stderr]    |                         ------- any code following this expression is unreachable
[INFO] [stderr] 68 |
[INFO] [stderr] 69 | /         for (key, value) in iter {
[INFO] [stderr] 70 | |             self.assert_key_in_bounds(key);
[INFO] [stderr] 71 | |             todo!()
[INFO] [stderr] 72 | |         }
[INFO] [stderr]    | |_________^ unreachable statement
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `iter`
[INFO] [stderr]   --> src/composite.rs:65:9
[INFO] [stderr]    |
[INFO] [stderr] 65 |         iter: I,
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ret`
[INFO] [stderr]   --> src/composite.rs:67:13
[INFO] [stderr]    |
[INFO] [stderr] 67 |         let mut ret = todo!();
[INFO] [stderr]    |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ret`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/composite.rs:69:14
[INFO] [stderr]    |
[INFO] [stderr] 69 |         for (key, value) in iter {
[INFO] [stderr]    |              ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `value`
[INFO] [stderr]   --> src/composite.rs:69:19
[INFO] [stderr]    |
[INFO] [stderr] 69 |         for (key, value) in iter {
[INFO] [stderr]    |                   ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rhs`
[INFO] [stderr]   --> src/composite.rs:85:25
[INFO] [stderr]    |
[INFO] [stderr] 85 |     pub fn merge(&self, rhs: &Composite<A, B>) -> Composite<A, B> {
[INFO] [stderr]    |                         ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `start`
[INFO] [stderr]   --> src/composite.rs:91:9
[INFO] [stderr]    |
[INFO] [stderr] 91 |         start: std::ops::Bound<&[u8]>,
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_start`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `end`
[INFO] [stderr]   --> src/composite.rs:92:9
[INFO] [stderr]    |
[INFO] [stderr] 92 |         end: std::ops::Bound<&[u8]>,
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_end`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/composite.rs:97:36
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn assert_key_in_bounds(&self, key: Key) {
[INFO] [stderr]    |                                    ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: function cannot return without recursing
[INFO] [stderr]    --> src/lib.rs:101:5
[INFO] [stderr]     |
[INFO] [stderr] 101 | /     fn range<'a>(
[INFO] [stderr] 102 | |         &'a self,
[INFO] [stderr] 103 | |         start: std::ops::Bound<&[u8]>,
[INFO] [stderr] 104 | |         end: std::ops::Bound<&[u8]>,
[INFO] [stderr] 105 | |     ) -> Self::Iter<'a> {
[INFO] [stderr]     | |_______________________^ cannot return without recursing
[INFO] [stderr] 106 |           Composite::range(self, start, end)
[INFO] [stderr]     |           ---------------------------------- recursive call site
[INFO] [stderr]     |
[INFO] [stderr]     = help: a `loop` may express intention better if this is on purpose
[INFO] [stderr]     = note: `#[warn(unconditional_recursion)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `inner` is never read
[INFO] [stderr]  --> src/composite.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub struct Iter<'a, A: Interface, B: Interface> {
[INFO] [stderr]   |            ---- field in this struct
[INFO] [stderr] 9 |     inner: &'a Composite<A, B>,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `merge_threshold` is never read
[INFO] [stderr]   --> src/composite.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub struct Composite<A: Interface, B: Interface> {
[INFO] [stderr]    |            --------- field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 31 |     merge_threshold: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Composite` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: method `range` is never used
[INFO] [stderr]   --> src/composite.rs:89:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | impl<A: Interface, B: Interface> Composite<A, B> {
[INFO] [stderr]    | ------------------------------------------------ method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 89 |     fn range<'a>(
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/lib.rs:20:12
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn get(&self, key: Key) -> Option<Value>;
[INFO] [stderr]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |            |
[INFO] [stderr]    |            the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn get(&self, key: Key) -> Option<Value<'_>>;
[INFO] [stderr]    |                                            ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/lib.rs:38:15
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn insert(&self, key: Key, value: Value) -> (Option<Value>, Self) {
[INFO] [stderr]    |               ^^^^^ the lifetime is elided here         ^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn insert(&self, key: Key, value: Value) -> (Option<Value<'_>>, Self) {
[INFO] [stderr]    |                                                              ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/lib.rs:45:15
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn remove(&self, key: Key) -> (Option<Value>, Self) {
[INFO] [stderr]    |               ^^^^^                       ^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |               |
[INFO] [stderr]    |               the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn remove(&self, key: Key) -> (Option<Value<'_>>, Self) {
[INFO] [stderr]    |                                                ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/lib.rs:69:12
[INFO] [stderr]    |
[INFO] [stderr] 69 |     fn get(&self, key: Key) -> Option<Value> {
[INFO] [stderr]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |            |
[INFO] [stderr]    |            the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 69 |     fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stderr]    |                                            ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/lib.rs:97:12
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn get(&self, key: Key) -> Option<Value> {
[INFO] [stderr]    |            ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |            |
[INFO] [stderr]    |            the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stderr]    |                                            ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/composite.rs:52:16
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn get(&self, key: Key) -> Option<Value> {
[INFO] [stderr]    |                ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                |
[INFO] [stderr]    |                the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 52 |     pub fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stderr]    |                                                ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]   --> src/naive.rs:45:16
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn get(&self, key: Key) -> Option<Value> {
[INFO] [stderr]    |                ^^^^^                      ^^^^^ the same lifetime is hidden here
[INFO] [stderr]    |                |
[INFO] [stderr]    |                the lifetime is elided here
[INFO] [stderr]    |
[INFO] [stderr]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]    |
[INFO] [stderr] 45 |     pub fn get(&self, key: Key) -> Option<Value<'_>> {
[INFO] [stderr]    |                                                ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `frond` (lib) generated 20 warnings (run `cargo fix --lib -p frond` to apply 15 suggestions)
[INFO] [stderr] warning: `frond` (lib test) generated 20 warnings (20 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/frond-41c95f2dc629bfeb)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/throughput.rs (/opt/rustwide/target/debug/deps/throughput-acf1e29f2f5bd66e)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests frond
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d801836b54e65ba42cbbeafbb4d53350aecf35edb3ac247b311efde0e85b0bcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d801836b54e65ba42cbbeafbb4d53350aecf35edb3ac247b311efde0e85b0bcb", kill_on_drop: false }`
[INFO] [stdout] d801836b54e65ba42cbbeafbb4d53350aecf35edb3ac247b311efde0e85b0bcb