[INFO] cloning repository https://github.com/Bnowako/storage_engine
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Bnowako/storage_engine" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBnowako%2Fstorage_engine", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBnowako%2Fstorage_engine'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 99a9f040c98c9c8afcea6d34aa244c4cb51f56a3
[INFO] checking Bnowako/storage_engine against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBnowako%2Fstorage_engine" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Bnowako/storage_engine on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Bnowako/storage_engine
[INFO] finished tweaking git repo https://github.com/Bnowako/storage_engine
[INFO] tweaked toml for git repo https://github.com/Bnowako/storage_engine written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Bnowako/storage_engine 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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 429789718d478895a3bc8c6a59cb85db72e0b038e44ed32ff46000da8978d6a6
[INFO] running `Command { std: "docker" "start" "-a" "429789718d478895a3bc8c6a59cb85db72e0b038e44ed32ff46000da8978d6a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "429789718d478895a3bc8c6a59cb85db72e0b038e44ed32ff46000da8978d6a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "429789718d478895a3bc8c6a59cb85db72e0b038e44ed32ff46000da8978d6a6", kill_on_drop: false }`
[INFO] [stdout] 429789718d478895a3bc8c6a59cb85db72e0b038e44ed32ff46000da8978d6a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 515276e828aac2fcd0ca63c50c12a51618072189446475d5e7997736ade7d30e
[INFO] running `Command { std: "docker" "start" "-a" "515276e828aac2fcd0ca63c50c12a51618072189446475d5e7997736ade7d30e", kill_on_drop: false }`
[INFO] [stderr]     Checking storage_engine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `MemTable`
[INFO] [stdout]  --> src/main.rs:3:35
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::mem_table::mem_table::{MemTable, new};
[INFO] [stdout]   |                                   ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Pair`, `new`
[INFO] [stdout]   --> src/mem_table.rs:34:35
[INFO] [stdout]    |
[INFO] [stdout] 34 | use crate::mem_table::mem_table::{new, Pair};
[INFO] [stdout]    |                                   ^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `MemTable`
[INFO] [stdout]  --> src/main.rs:3:35
[INFO] [stdout]   |
[INFO] [stdout] 3 | use crate::mem_table::mem_table::{MemTable, new};
[INFO] [stdout]   |                                   ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]   --> src/mem_table.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |                 Ok(pos) => {}
[INFO] [stdout]    |                    ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]   --> src/mem_table.rs:28:21
[INFO] [stdout]    |
[INFO] [stdout] 28 |                 Err(pos) => { None }
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a = new();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `values` is never read
[INFO] [stdout]  --> src/mem_table.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub struct MemTable {
[INFO] [stdout]   |                -------- field in this struct
[INFO] [stdout] 3 |         pub values: Vec<Pair>,
[INFO] [stdout]   |             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `key` and `value` are never read
[INFO] [stdout]   --> src/mem_table.rs:13:20
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub struct Pair {
[INFO] [stdout]    |                ---- fields in this struct
[INFO] [stdout] 13 |         pub(crate) key: String,
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 14 |         pub(crate) value: Vec<u8>,
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add` and `get` are never used
[INFO] [stdout]   --> src/mem_table.rs:19:16
[INFO] [stdout]    |
[INFO] [stdout] 18 |     impl MemTable {
[INFO] [stdout]    |     ------------- methods in this implementation
[INFO] [stdout] 19 |         pub fn add(&mut self, pair: Pair) {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |         pub fn get(&self, key: String) -> Option<&Pair> {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]   --> src/mem_table.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |                 Ok(pos) => {}
[INFO] [stdout]    |                    ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]   --> src/mem_table.rs:28:21
[INFO] [stdout]    |
[INFO] [stdout] 28 |                 Err(pos) => { None }
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a = new();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> src/mem_table.rs:14:20
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub struct Pair {
[INFO] [stdout]    |                ---- field in this struct
[INFO] [stdout] 13 |         pub(crate) key: String,
[INFO] [stdout] 14 |         pub(crate) value: Vec<u8>,
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] running `Command { std: "docker" "inspect" "515276e828aac2fcd0ca63c50c12a51618072189446475d5e7997736ade7d30e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "515276e828aac2fcd0ca63c50c12a51618072189446475d5e7997736ade7d30e", kill_on_drop: false }`
[INFO] [stdout] 515276e828aac2fcd0ca63c50c12a51618072189446475d5e7997736ade7d30e
[INFO] checking Bnowako/storage_engine against try#36dbcaee1a55543dfc181be52a69d99ff46ff62f for pr-122960-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBnowako%2Fstorage_engine" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Bnowako/storage_engine on toolchain 36dbcaee1a55543dfc181be52a69d99ff46ff62f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Bnowako/storage_engine
[INFO] finished tweaking git repo https://github.com/Bnowako/storage_engine
[INFO] tweaked toml for git repo https://github.com/Bnowako/storage_engine written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Bnowako/storage_engine 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" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4f11dec4f82fc9a628caebea5c681d3edbe548315c7ac7866b2183999a0ba66e
[INFO] running `Command { std: "docker" "start" "-a" "4f11dec4f82fc9a628caebea5c681d3edbe548315c7ac7866b2183999a0ba66e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4f11dec4f82fc9a628caebea5c681d3edbe548315c7ac7866b2183999a0ba66e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f11dec4f82fc9a628caebea5c681d3edbe548315c7ac7866b2183999a0ba66e", kill_on_drop: false }`
[INFO] [stdout] 4f11dec4f82fc9a628caebea5c681d3edbe548315c7ac7866b2183999a0ba66e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+36dbcaee1a55543dfc181be52a69d99ff46ff62f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f48422636140ecc229efca471faf66483d3bd433d38e220df3b025250a10cdbd
[INFO] running `Command { std: "docker" "start" "-a" "f48422636140ecc229efca471faf66483d3bd433d38e220df3b025250a10cdbd", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Checking storage_engine v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/main.rs from 2021 edition to 2024
[INFO] [stderr]        Fixed src/mem_table.rs (1 fix)
[INFO] [stderr]        Fixed src/main.rs (1 fix)
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]   --> src/mem_table.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |                 Ok(pos) => {}
[INFO] [stdout]    |                    ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]   --> src/mem_table.rs:28:21
[INFO] [stdout]    |
[INFO] [stdout] 28 |                 Err(pos) => { None }
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a = new();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `values` is never read
[INFO] [stdout]  --> src/mem_table.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 2 |     pub struct MemTable {
[INFO] [stdout]   |                -------- field in this struct
[INFO] [stdout] 3 |         pub values: Vec<Pair>,
[INFO] [stdout]   |             ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `key` and `value` are never read
[INFO] [stdout]   --> src/mem_table.rs:13:20
[INFO] [stdout]    |
[INFO] [stdout] 12 |     pub struct Pair {
[INFO] [stdout]    |                ---- fields in this struct
[INFO] [stdout] 13 |         pub(crate) key: String,
[INFO] [stdout]    |                    ^^^
[INFO] [stdout] 14 |         pub(crate) value: Vec<u8>,
[INFO] [stdout]    |                    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add` and `get` are never used
[INFO] [stdout]   --> src/mem_table.rs:19:16
[INFO] [stdout]    |
[INFO] [stdout] 18 |     impl MemTable {
[INFO] [stdout]    |     ------------- methods in this implementation
[INFO] [stdout] 19 |         pub fn add(&mut self, pair: Pair) {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |         pub fn get(&self, key: String) -> Option<&Pair> {
[INFO] [stdout]    |                ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `new` in this scope
[INFO] [stdout]   --> src/mem_table.rs:37:25
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let mut mem_table = new();
[INFO] [stdout]    |                         ^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function through its public re-export
[INFO] [stdout]    |
[INFO] [stdout] 1  + use crate::new;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Pair` in this scope
[INFO] [stdout]   --> src/mem_table.rs:38:19
[INFO] [stdout]    |
[INFO] [stdout] 38 |     mem_table.add(Pair { key: String::from("a"), value: vec![1, 4, 3] });
[INFO] [stdout]    |                   ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 1  + use crate::mem_table::mem_table::Pair;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0422]: cannot find struct, variant or union type `Pair` in this scope
[INFO] [stdout]   --> src/mem_table.rs:39:19
[INFO] [stdout]    |
[INFO] [stdout] 39 |     mem_table.add(Pair { key: String::from("b"), value: vec![1, 4, 3] });
[INFO] [stdout]    |                   ^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this struct
[INFO] [stdout]    |
[INFO] [stdout] 1  + use crate::mem_table::mem_table::Pair;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]   --> src/mem_table.rs:21:20
[INFO] [stdout]    |
[INFO] [stdout] 21 |                 Ok(pos) => {}
[INFO] [stdout]    |                    ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pos`
[INFO] [stdout]   --> src/mem_table.rs:28:21
[INFO] [stdout]    |
[INFO] [stdout] 28 |                 Err(pos) => { None }
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let a = new();
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0422, E0425.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0422`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `storage_engine` (bin "storage_engine" test) due to 4 previous errors; 3 warnings emitted
[INFO] [stderr] error: failed to migrate to next edition
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `cargo fix --edition --allow-no-vcs --allow-dirty --frozen --all --all-targets --message-format=json` (exit status: 101)
[INFO] running `Command { std: "docker" "inspect" "f48422636140ecc229efca471faf66483d3bd433d38e220df3b025250a10cdbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f48422636140ecc229efca471faf66483d3bd433d38e220df3b025250a10cdbd", kill_on_drop: false }`
[INFO] [stdout] f48422636140ecc229efca471faf66483d3bd433d38e220df3b025250a10cdbd