[INFO] fetching crate libkv 0.1.0...
[INFO] testing libkv-0.1.0 against master#733b47ea4b1b86216f14ef56e49440c33933f230+rustflags=-Copt-level=3 for pr-138759
[INFO] extracting crate libkv 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate libkv 0.1.0
[INFO] finished tweaking crates.io crate libkv 0.1.0
[INFO] tweaked toml for crates.io crate libkv 0.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate libkv 0.1.0 on toolchain 733b47ea4b1b86216f14ef56e49440c33933f230
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 11 packages to latest compatible versions
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.17)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b59a63ea3f87aa407b909c19406120fb0d8e4210cd16e99187347cceb135c38a
[INFO] running `Command { std: "docker" "start" "-a" "b59a63ea3f87aa407b909c19406120fb0d8e4210cd16e99187347cceb135c38a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b59a63ea3f87aa407b909c19406120fb0d8e4210cd16e99187347cceb135c38a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b59a63ea3f87aa407b909c19406120fb0d8e4210cd16e99187347cceb135c38a", kill_on_drop: false }`
[INFO] [stdout] b59a63ea3f87aa407b909c19406120fb0d8e4210cd16e99187347cceb135c38a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8a100a207e22e4610c39b64ac6e232a03e8051bb69c4ad50955b1fd7a82a0e65
[INFO] running `Command { std: "docker" "start" "-a" "8a100a207e22e4610c39b64ac6e232a03e8051bb69c4ad50955b1fd7a82a0e65", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling libkv v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/storage.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         &self,
[INFO] [stdout]    |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 38 |     ) -> Result<Iter<Vec<u8>>, KeySerializeError>;
[INFO] [stdout]    |                 ------------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 38 |     ) -> Result<Iter<'_, Vec<u8>>, KeySerializeError>;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/storage.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         &self,
[INFO] [stdout]    |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 46 |     ) -> Result<Iter<(Vec<u8>, Vec<u8>)>, KeySerializeError>;
[INFO] [stdout]    |                 ------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 46 |     ) -> Result<Iter<'_, (Vec<u8>, Vec<u8>)>, KeySerializeError>;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/storage.rs:117:9
[INFO] [stdout]     |
[INFO] [stdout] 117 |         &self,
[INFO] [stdout]     |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 121 |     ) -> Result<Iter<Vec<u8>>, KeySerializeError> {
[INFO] [stdout]     |                 ------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 121 |     ) -> Result<Iter<'_, Vec<u8>>, KeySerializeError> {
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/storage.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         &self,
[INFO] [stdout]     |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 142 |     ) -> Result<Iter<(Vec<u8>, Vec<u8>)>, KeySerializeError> {
[INFO] [stdout]     |                 ------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 142 |     ) -> Result<Iter<'_, (Vec<u8>, Vec<u8>)>, KeySerializeError> {
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.00s
[INFO] running `Command { std: "docker" "inspect" "8a100a207e22e4610c39b64ac6e232a03e8051bb69c4ad50955b1fd7a82a0e65", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a100a207e22e4610c39b64ac6e232a03e8051bb69c4ad50955b1fd7a82a0e65", kill_on_drop: false }`
[INFO] [stdout] 8a100a207e22e4610c39b64ac6e232a03e8051bb69c4ad50955b1fd7a82a0e65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e71cc3aef94e7a424af42ab8177d9da5491ed0e99f6f8484cf5e57578dd475d8
[INFO] running `Command { std: "docker" "start" "-a" "e71cc3aef94e7a424af42ab8177d9da5491ed0e99f6f8484cf5e57578dd475d8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libkv v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/storage.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         &self,
[INFO] [stdout]    |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 38 |     ) -> Result<Iter<Vec<u8>>, KeySerializeError>;
[INFO] [stdout]    |                 ------------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 38 |     ) -> Result<Iter<'_, Vec<u8>>, KeySerializeError>;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/storage.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         &self,
[INFO] [stdout]    |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 46 |     ) -> Result<Iter<(Vec<u8>, Vec<u8>)>, KeySerializeError>;
[INFO] [stdout]    |                 ------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 46 |     ) -> Result<Iter<'_, (Vec<u8>, Vec<u8>)>, KeySerializeError>;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/storage.rs:117:9
[INFO] [stdout]     |
[INFO] [stdout] 117 |         &self,
[INFO] [stdout]     |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 121 |     ) -> Result<Iter<Vec<u8>>, KeySerializeError> {
[INFO] [stdout]     |                 ------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 121 |     ) -> Result<Iter<'_, Vec<u8>>, KeySerializeError> {
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/storage.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         &self,
[INFO] [stdout]     |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 142 |     ) -> Result<Iter<(Vec<u8>, Vec<u8>)>, KeySerializeError> {
[INFO] [stdout]     |                 ------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 142 |     ) -> Result<Iter<'_, (Vec<u8>, Vec<u8>)>, KeySerializeError> {
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/storage.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |         &self,
[INFO] [stdout]    |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 38 |     ) -> Result<Iter<Vec<u8>>, KeySerializeError>;
[INFO] [stdout]    |                 ------------- the lifetime gets resolved as `'_`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 38 |     ) -> Result<Iter<'_, Vec<u8>>, KeySerializeError>;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/storage.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         &self,
[INFO] [stdout]    |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 46 |     ) -> Result<Iter<(Vec<u8>, Vec<u8>)>, KeySerializeError>;
[INFO] [stdout]    |                 ------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]    |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 46 |     ) -> Result<Iter<'_, (Vec<u8>, Vec<u8>)>, KeySerializeError>;
[INFO] [stdout]    |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/storage.rs:117:9
[INFO] [stdout]     |
[INFO] [stdout] 117 |         &self,
[INFO] [stdout]     |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 121 |     ) -> Result<Iter<Vec<u8>>, KeySerializeError> {
[INFO] [stdout]     |                 ------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 121 |     ) -> Result<Iter<'_, Vec<u8>>, KeySerializeError> {
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/storage.rs:138:9
[INFO] [stdout]     |
[INFO] [stdout] 138 |         &self,
[INFO] [stdout]     |         ^^^^^ this lifetime flows to the output
[INFO] [stdout] ...
[INFO] [stdout] 142 |     ) -> Result<Iter<(Vec<u8>, Vec<u8>)>, KeySerializeError> {
[INFO] [stdout]     |                 ------------------------ the lifetime gets resolved as `'_`
[INFO] [stdout]     |
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 142 |     ) -> Result<Iter<'_, (Vec<u8>, Vec<u8>)>, KeySerializeError> {
[INFO] [stdout]     |                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.52s
[INFO] running `Command { std: "docker" "inspect" "e71cc3aef94e7a424af42ab8177d9da5491ed0e99f6f8484cf5e57578dd475d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e71cc3aef94e7a424af42ab8177d9da5491ed0e99f6f8484cf5e57578dd475d8", kill_on_drop: false }`
[INFO] [stdout] e71cc3aef94e7a424af42ab8177d9da5491ed0e99f6f8484cf5e57578dd475d8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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 -Copt-level=3" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+733b47ea4b1b86216f14ef56e49440c33933f230" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 763fc31ad0e9ce23e0a110092104a983a672db3791865082091a25c85ea57e3e
[INFO] running `Command { std: "docker" "start" "-a" "763fc31ad0e9ce23e0a110092104a983a672db3791865082091a25c85ea57e3e", kill_on_drop: false }`
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> src/storage.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |         &self,
[INFO] [stderr]    |         ^^^^^ this lifetime flows to the output
[INFO] [stderr] ...
[INFO] [stderr] 38 |     ) -> Result<Iter<Vec<u8>>, KeySerializeError>;
[INFO] [stderr]    |                 ------------- the lifetime gets resolved as `'_`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 38 |     ) -> Result<Iter<'_, Vec<u8>>, KeySerializeError>;
[INFO] [stderr]    |                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]   --> src/storage.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |         &self,
[INFO] [stderr]    |         ^^^^^ this lifetime flows to the output
[INFO] [stderr] ...
[INFO] [stderr] 46 |     ) -> Result<Iter<(Vec<u8>, Vec<u8>)>, KeySerializeError>;
[INFO] [stderr]    |                 ------------------------ the lifetime gets resolved as `'_`
[INFO] [stderr]    |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]    |
[INFO] [stderr] 46 |     ) -> Result<Iter<'_, (Vec<u8>, Vec<u8>)>, KeySerializeError>;
[INFO] [stderr]    |                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]    --> src/storage.rs:117:9
[INFO] [stderr]     |
[INFO] [stderr] 117 |         &self,
[INFO] [stderr]     |         ^^^^^ this lifetime flows to the output
[INFO] [stderr] ...
[INFO] [stderr] 121 |     ) -> Result<Iter<Vec<u8>>, KeySerializeError> {
[INFO] [stderr]     |                 ------------- the lifetime gets resolved as `'_`
[INFO] [stderr]     |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]     |
[INFO] [stderr] 121 |     ) -> Result<Iter<'_, Vec<u8>>, KeySerializeError> {
[INFO] [stderr]     |                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stderr]    --> src/storage.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 |         &self,
[INFO] [stderr]     |         ^^^^^ this lifetime flows to the output
[INFO] [stderr] ...
[INFO] [stderr] 142 |     ) -> Result<Iter<(Vec<u8>, Vec<u8>)>, KeySerializeError> {
[INFO] [stderr]     |                 ------------------------ the lifetime gets resolved as `'_`
[INFO] [stderr]     |
[INFO] [stderr] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stderr]     |
[INFO] [stderr] 142 |     ) -> Result<Iter<'_, (Vec<u8>, Vec<u8>)>, KeySerializeError> {
[INFO] [stderr]     |                      +++
[INFO] [stderr] 
[INFO] [stderr] warning: `libkv` (lib) generated 4 warnings
[INFO] [stderr] warning: `libkv` (lib test) generated 4 warnings (4 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/libkv-c2d6242a0fdc4f93)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test structures::queue::tests::test_priority_queue ... ok
[INFO] [stdout] test structures::item::test::test_item ... ok
[INFO] [stdout] test structures::map::test::test_map_iter ... ok
[INFO] [stdout] test structures::map::test::test_map ... ok
[INFO] [stdout] test key_serialization::test::test_keyserde ... ok
[INFO] [stdout] test structures::vector::test::test_vector ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- structures::vector::test::test_vector stdout ----
[INFO] [stdout] 
[INFO] [stdout] thread 'structures::vector::test::test_vector' panicked at src/structures/vector.rs:115:9:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: Ok(0)
[INFO] [stdout]  right: Ok(1)
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55578ecd1372 - std::backtrace_rs::backtrace::libunwind::trace::h73a647620bf1c49d
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x55578ecd1372 - std::backtrace_rs::backtrace::trace_unsynchronized::hd4d513ed96cb3cb1
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x55578ecd1372 - std::sys::backtrace::_print_fmt::h61bb95f7476aafa5
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:66:9
[INFO] [stdout]    3:     0x55578ecd1372 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::ha2e7e3a01df69042
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:39:26
[INFO] [stdout]    4:     0x55578ecf6703 - core::fmt::rt::Argument::fmt::hf14163372f0f9a76
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/fmt/rt.rs:173:76
[INFO] [stdout]    5:     0x55578ecf6703 - core::fmt::write::h7cb8f63788cd01d2
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/fmt/mod.rs:1465:25
[INFO] [stdout]    6:     0x55578ecce303 - std::io::default_write_fmt::h9ed739ccee8a150c
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x55578ecce303 - std::io::Write::write_fmt::h1c0a32da913b32f1
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/io/mod.rs:1954:13
[INFO] [stdout]    8:     0x55578ecd11c2 - std::sys::backtrace::BacktraceLock::print::h3ec4d7883eb25e61
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:42:9
[INFO] [stdout]    9:     0x55578ecd28dc - std::panicking::default_hook::{{closure}}::h29548987efd832cb
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:300:27
[INFO] [stdout]   10:     0x55578ecd2732 - std::panicking::default_hook::ha25170a15c643514
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:324:9
[INFO] [stdout]   11:     0x55578ec9a854 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h562adeecbf43c420
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   12:     0x55578ec9a854 - test::test_main_with_exit_callback::{{closure}}::h97dd2a879d27e0e4
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x55578ecd32bb - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h7e85cbdbda26fdb7
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1985:9
[INFO] [stdout]   14:     0x55578ecd32bb - std::panicking::rust_panic_with_hook::h0d81afcd829aa24b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:841:13
[INFO] [stdout]   15:     0x55578ecd308a - std::panicking::begin_panic_handler::{{closure}}::hc84a33f1202346cf
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:706:13
[INFO] [stdout]   16:     0x55578ecd1869 - std::sys::backtrace::__rust_end_short_backtrace::h373067a14f6c59aa
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:168:18
[INFO] [stdout]   17:     0x55578ecd2d1d - __rustc[beb0385846a06d21]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:697:5
[INFO] [stdout]   18:     0x55578ecf4fb0 - core::panicking::panic_fmt::ha33fa2ae772efba9
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panicking.rs:75:14
[INFO] [stdout]   19:     0x55578ecf5217 - core::panicking::assert_failed_inner::h6a89cd271393c011
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panicking.rs:448:17
[INFO] [stdout]   20:     0x55578ec5e8c0 - core::panicking::assert_failed::hec70b05557415c9e
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panicking.rs:403:5
[INFO] [stdout]   21:     0x55578ec5d7b1 - libkv::structures::vector::test::test_vector::h422d771f5823b095
[INFO] [stdout]                                at /opt/rustwide/workdir/src/structures/vector.rs:115:9
[INFO] [stdout]   22:     0x55578ec5e769 - libkv::structures::vector::test::test_vector::{{closure}}::h9378728d44a395f2
[INFO] [stdout]                                at /opt/rustwide/workdir/src/structures/vector.rs:98:21
[INFO] [stdout]   23:     0x55578ec5e769 - core::ops::function::FnOnce::call_once::hf7f8be2b9af19b08
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x55578ec9ff8b - core::ops::function::FnOnce::call_once::hf84b9c3d864a6959
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x55578ec9ff8b - test::__rust_begin_short_backtrace::h5724e31441c16fcb
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:648:18
[INFO] [stdout]   26:     0x55578ec9f1ce - test::run_test_in_process::{{closure}}::hbc28c9aa91793d7d
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:671:74
[INFO] [stdout]   27:     0x55578ec9f1ce - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::hc17b0e238c0f8f3e
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   28:     0x55578ec9f1ce - std::panicking::catch_unwind::do_call::hcdbce0d6dd6c83ce
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:589:40
[INFO] [stdout]   29:     0x55578ec9f1ce - std::panicking::catch_unwind::h9477967ceea044e8
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:552:19
[INFO] [stdout]   30:     0x55578ec9f1ce - std::panic::catch_unwind::h616a2e249da12e16
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x55578ec9f1ce - test::run_test_in_process::h2758deb0f2e54430
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:671:27
[INFO] [stdout]   32:     0x55578ec9f1ce - test::run_test::{{closure}}::habe5cd2564b18aaa
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:592:43
[INFO] [stdout]   33:     0x55578ec62d74 - test::run_test::{{closure}}::h9a0a6928f1a15421
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/test/src/lib.rs:622:41
[INFO] [stdout]   34:     0x55578ec62d74 - std::sys::backtrace::__rust_begin_short_backtrace::hd68b5332434a22ca
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/backtrace.rs:152:18
[INFO] [stdout]   35:     0x55578ec6671a - std::thread::Builder::spawn_unchecked_::{{closure}}::{{closure}}::h264ddcc3098eacae
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/thread/mod.rs:559:17
[INFO] [stdout]   36:     0x55578ec6671a - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h9fa39489749d6f3c
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/panic/unwind_safe.rs:272:9
[INFO] [stdout]   37:     0x55578ec6671a - std::panicking::catch_unwind::do_call::hb9a1944b9f85100f
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:589:40
[INFO] [stdout]   38:     0x55578ec6671a - std::panicking::catch_unwind::h0c6f100786c0dad8
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panicking.rs:552:19
[INFO] [stdout]   39:     0x55578ec6671a - std::panic::catch_unwind::hf6084e2723385823
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x55578ec6671a - std::thread::Builder::spawn_unchecked_::{{closure}}::hf0af58ce658143ad
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/thread/mod.rs:557:30
[INFO] [stdout]   41:     0x55578ec6671a - core::ops::function::FnOnce::call_once{{vtable.shim}}::h88a14f9b2e79f9de
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x55578ecd6217 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf31256ba38644b65
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   43:     0x55578ecd6217 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h100ad77f3448041b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/alloc/src/boxed.rs:1971:9
[INFO] [stdout]   44:     0x55578ecd6217 - std::sys::pal::unix::thread::Thread::new::thread_start::h1a22ded422ce395b
[INFO] [stdout]                                at /rustc/733b47ea4b1b86216f14ef56e49440c33933f230/library/std/src/sys/pal/unix/thread.rs:97:17
[INFO] [stdout]   45:     0x7a34159d2aa4 - <unknown>
[INFO] [stdout]   46:     0x7a3415a5fa34 - clone
[INFO] [stdout]   47:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     structures::vector::test::test_vector
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 5 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr] error: test failed, to rerun pass `--lib`
[INFO] running `Command { std: "docker" "inspect" "763fc31ad0e9ce23e0a110092104a983a672db3791865082091a25c85ea57e3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "763fc31ad0e9ce23e0a110092104a983a672db3791865082091a25c85ea57e3e", kill_on_drop: false }`
[INFO] [stdout] 763fc31ad0e9ce23e0a110092104a983a672db3791865082091a25c85ea57e3e
