[INFO] cloning repository https://github.com/drllama07/B-Tree-in-rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/drllama07/B-Tree-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrllama07%2FB-Tree-in-rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrllama07%2FB-Tree-in-rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 522a8a54447144ff01623b2e6c23ceeacf99a4d2 [INFO] checking drllama07/B-Tree-in-rust against try#78c81ee3917a99dcff6e2e6822800f0492c415c3 for pr-148967 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdrllama07%2FB-Tree-in-rust" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/drllama07/B-Tree-in-rust [INFO] finished tweaking git repo https://github.com/drllama07/B-Tree-in-rust [INFO] tweaked toml for git repo https://github.com/drllama07/B-Tree-in-rust written to /workspace/builds/worker-7-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/drllama07/B-Tree-in-rust on toolchain 78c81ee3917a99dcff6e2e6822800f0492c415c3 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+78c81ee3917a99dcff6e2e6822800f0492c415c3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/drllama07/B-Tree-in-rust 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" "+78c81ee3917a99dcff6e2e6822800f0492c415c3" "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-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+78c81ee3917a99dcff6e2e6822800f0492c415c3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b68737da597d363c2dd5a35df1cb7d2404e8db336d71dce66ca3d317bdd08a92 [INFO] running `Command { std: "docker" "start" "-a" "b68737da597d363c2dd5a35df1cb7d2404e8db336d71dce66ca3d317bdd08a92", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b68737da597d363c2dd5a35df1cb7d2404e8db336d71dce66ca3d317bdd08a92", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b68737da597d363c2dd5a35df1cb7d2404e8db336d71dce66ca3d317bdd08a92", kill_on_drop: false }` [INFO] [stdout] b68737da597d363c2dd5a35df1cb7d2404e8db336d71dce66ca3d317bdd08a92 [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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+78c81ee3917a99dcff6e2e6822800f0492c415c3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 146c089d9e7f08704501d8bd18c7df78d68b6018f7421a4da1d0f3e3833d24a6 [INFO] running `Command { std: "docker" "start" "-a" "146c089d9e7f08704501d8bd18c7df78d68b6018f7421a4da1d0f3e3833d24a6", kill_on_drop: false }` [INFO] [stderr] Checking b_plus_tree v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `std::cmp::min` [INFO] [stdout] --> src/btrees.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::cmp::min; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::cmp::min` [INFO] [stdout] --> src/btrees.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::cmp::min; [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable pattern [INFO] [stdout] --> src/btrees.rs:43:13 [INFO] [stdout] | [INFO] [stdout] 43 | _ => panic!("---") [INFO] [stdout] | ^ no value can reach this [INFO] [stdout] | [INFO] [stdout] note: multiple earlier patterns match some of the same values [INFO] [stdout] --> src/btrees.rs:43:13 [INFO] [stdout] | [INFO] [stdout] 34 | NodeType::Internal(keys) => { [INFO] [stdout] | ------------------------ matches some of the same values [INFO] [stdout] ... [INFO] [stdout] 42 | NodeType::Leaf(_) => panic!("There are no children of leaf nodes"), [INFO] [stdout] | ----------------- matches some of the same values [INFO] [stdout] 43 | _ => panic!("---") [INFO] [stdout] | ^ collectively making this unreachable [INFO] [stdout] = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable pattern [INFO] [stdout] --> src/btrees.rs:133:11 [INFO] [stdout] | [INFO] [stdout] 133 | _ => panic!("Undefined structure") [INFO] [stdout] | ^ no value can reach this [INFO] [stdout] | [INFO] [stdout] note: multiple earlier patterns match some of the same values [INFO] [stdout] --> src/btrees.rs:133:11 [INFO] [stdout] | [INFO] [stdout] 107 | NodeType::Leaf(keyvalue) => { [INFO] [stdout] | ------------------------ matches some of the same values [INFO] [stdout] ... [INFO] [stdout] 110 | NodeType::Internal(keys) => { [INFO] [stdout] | ------------------------ matches some of the same values [INFO] [stdout] ... [INFO] [stdout] 133 | _ => panic!("Undefined structure") [INFO] [stdout] | ^ collectively making this unreachable [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/btrees.rs:119:23 [INFO] [stdout] | [INFO] [stdout] 119 | let mut parent:u16; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `keyvalue` [INFO] [stdout] --> src/btrees.rs:107:26 [INFO] [stdout] | [INFO] [stdout] 107 | NodeType::Leaf(keyvalue) => { [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_keyvalue` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `parent_id` [INFO] [stdout] --> src/btrees.rs:140:23 [INFO] [stdout] | [INFO] [stdout] 140 | let (node_id, parent_id) = self.search(key); [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent_id` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `parent_id` [INFO] [stdout] --> src/btrees.rs:145:23 [INFO] [stdout] | [INFO] [stdout] 145 | let (node_id, parent_id) = self.search(key); [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent_id` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/btrees.rs:260:12 [INFO] [stdout] | [INFO] [stdout] 260 | let mut node = self.nodes.get_mut(¤t).unwrap(); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/btrees.rs:350:13 [INFO] [stdout] | [INFO] [stdout] 350 | let mut parent_node = self.nodes.get_mut(&parent).unwrap(); [INFO] [stdout] | ----^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/btrees.rs:333:21 [INFO] [stdout] | [INFO] [stdout] 333 | for i in 0..middle_index { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/btrees.rs:340:21 [INFO] [stdout] | [INFO] [stdout] 340 | for i in 0..middle_index { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/btrees.rs:430:13 [INFO] [stdout] | [INFO] [stdout] 430 | let mut node = self.nodes.get_mut(¤t).unwrap(); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/btrees.rs:549:22 [INFO] [stdout] | [INFO] [stdout] 549 | let mut moved_value = kvs.pop().unwrap(); [INFO] [stdout] | ----^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `last_idx` [INFO] [stdout] --> src/btrees.rs:550:22 [INFO] [stdout] | [INFO] [stdout] 550 | let last_idx = &kvs.len() -1; [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_idx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `kvs` [INFO] [stdout] --> src/btrees.rs:716:26 [INFO] [stdout] | [INFO] [stdout] 716 | NodeType::Leaf(kvs) => { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_kvs` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `child_id` is never read [INFO] [stdout] --> src/btrees.rs:701:28 [INFO] [stdout] | [INFO] [stdout] 701 | let mut child_id = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `KeyValue` should have a snake case name [INFO] [stdout] --> src/btrees.rs:161:28 [INFO] [stdout] | [INFO] [stdout] 161 | NodeType::Leaf(KeyValue) => { [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to snake case: `key_value` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `KeyValue` should have a snake case name [INFO] [stdout] --> src/btrees.rs:180:28 [INFO] [stdout] | [INFO] [stdout] 180 | NodeType::Leaf(KeyValue) => { [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to snake case: `key_value` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/btrees.rs:726:14 [INFO] [stdout] | [INFO] [stdout] 726 | mem::replace(pkvs, cells); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 726 | let _ = mem::replace(pkvs, cells); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable pattern [INFO] [stdout] --> src/btrees.rs:43:13 [INFO] [stdout] | [INFO] [stdout] 43 | _ => panic!("---") [INFO] [stdout] | ^ no value can reach this [INFO] [stdout] | [INFO] [stdout] note: multiple earlier patterns match some of the same values [INFO] [stdout] --> src/btrees.rs:43:13 [INFO] [stdout] | [INFO] [stdout] 34 | NodeType::Internal(keys) => { [INFO] [stdout] | ------------------------ matches some of the same values [INFO] [stdout] ... [INFO] [stdout] 42 | NodeType::Leaf(_) => panic!("There are no children of leaf nodes"), [INFO] [stdout] | ----------------- matches some of the same values [INFO] [stdout] 43 | _ => panic!("---") [INFO] [stdout] | ^ collectively making this unreachable [INFO] [stdout] = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unreachable pattern [INFO] [stdout] --> src/btrees.rs:133:11 [INFO] [stdout] | [INFO] [stdout] 133 | _ => panic!("Undefined structure") [INFO] [stdout] | ^ no value can reach this [INFO] [stdout] | [INFO] [stdout] note: multiple earlier patterns match some of the same values [INFO] [stdout] --> src/btrees.rs:133:11 [INFO] [stdout] | [INFO] [stdout] 107 | NodeType::Leaf(keyvalue) => { [INFO] [stdout] | ------------------------ matches some of the same values [INFO] [stdout] ... [INFO] [stdout] 110 | NodeType::Internal(keys) => { [INFO] [stdout] | ------------------------ matches some of the same values [INFO] [stdout] ... [INFO] [stdout] 133 | _ => panic!("Undefined structure") [INFO] [stdout] | ^ collectively making this unreachable [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/btrees.rs:119:23 [INFO] [stdout] | [INFO] [stdout] 119 | let mut parent:u16; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `keyvalue` [INFO] [stdout] --> src/btrees.rs:107:26 [INFO] [stdout] | [INFO] [stdout] 107 | NodeType::Leaf(keyvalue) => { [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_keyvalue` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `parent_id` [INFO] [stdout] --> src/btrees.rs:140:23 [INFO] [stdout] | [INFO] [stdout] 140 | let (node_id, parent_id) = self.search(key); [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent_id` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `parent_id` [INFO] [stdout] --> src/btrees.rs:145:23 [INFO] [stdout] | [INFO] [stdout] 145 | let (node_id, parent_id) = self.search(key); [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_parent_id` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/btrees.rs:260:12 [INFO] [stdout] | [INFO] [stdout] 260 | let mut node = self.nodes.get_mut(¤t).unwrap(); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/btrees.rs:350:13 [INFO] [stdout] | [INFO] [stdout] 350 | let mut parent_node = self.nodes.get_mut(&parent).unwrap(); [INFO] [stdout] | ----^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/btrees.rs:333:21 [INFO] [stdout] | [INFO] [stdout] 333 | for i in 0..middle_index { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `i` [INFO] [stdout] --> src/btrees.rs:340:21 [INFO] [stdout] | [INFO] [stdout] 340 | for i in 0..middle_index { [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_i` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/btrees.rs:430:13 [INFO] [stdout] | [INFO] [stdout] 430 | let mut node = self.nodes.get_mut(¤t).unwrap(); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/btrees.rs:549:22 [INFO] [stdout] | [INFO] [stdout] 549 | let mut moved_value = kvs.pop().unwrap(); [INFO] [stdout] | ----^^^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `last_idx` [INFO] [stdout] --> src/btrees.rs:550:22 [INFO] [stdout] | [INFO] [stdout] 550 | let last_idx = &kvs.len() -1; [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_idx` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `kvs` [INFO] [stdout] --> src/btrees.rs:716:26 [INFO] [stdout] | [INFO] [stdout] 716 | NodeType::Leaf(kvs) => { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_kvs` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: value assigned to `child_id` is never read [INFO] [stdout] --> src/btrees.rs:701:28 [INFO] [stdout] | [INFO] [stdout] 701 | let mut child_id = 0; [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `KeyValue` should have a snake case name [INFO] [stdout] --> src/btrees.rs:161:28 [INFO] [stdout] | [INFO] [stdout] 161 | NodeType::Leaf(KeyValue) => { [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to snake case: `key_value` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable `KeyValue` should have a snake case name [INFO] [stdout] --> src/btrees.rs:180:28 [INFO] [stdout] | [INFO] [stdout] 180 | NodeType::Leaf(KeyValue) => { [INFO] [stdout] | ^^^^^^^^ help: convert the identifier to snake case: `key_value` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used [INFO] [stdout] --> src/btrees.rs:726:14 [INFO] [stdout] | [INFO] [stdout] 726 | mem::replace(pkvs, cells); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if you don't need the old value, you can just assign the new value directly [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 726 | let _ = mem::replace(pkvs, cells); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s [INFO] running `Command { std: "docker" "inspect" "146c089d9e7f08704501d8bd18c7df78d68b6018f7421a4da1d0f3e3833d24a6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "146c089d9e7f08704501d8bd18c7df78d68b6018f7421a4da1d0f3e3833d24a6", kill_on_drop: false }` [INFO] [stdout] 146c089d9e7f08704501d8bd18c7df78d68b6018f7421a4da1d0f3e3833d24a6