[INFO] cloning repository https://github.com/johnsonjsyuen/diy_db_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/johnsonjsyuen/diy_db_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnsonjsyuen%2Fdiy_db_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnsonjsyuen%2Fdiy_db_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5346883d5adff3f16a0a4b7e92a047f9e318335a
[INFO] checking johnsonjsyuen/diy_db_rust against master#b2728d5426bab1d8c39709768c7e22b7f66dde5d for pr-135852
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnsonjsyuen%2Fdiy_db_rust" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/johnsonjsyuen/diy_db_rust on toolchain b2728d5426bab1d8c39709768c7e22b7f66dde5d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/johnsonjsyuen/diy_db_rust
[INFO] finished tweaking git repo https://github.com/johnsonjsyuen/diy_db_rust
[INFO] tweaked toml for git repo https://github.com/johnsonjsyuen/diy_db_rust written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/johnsonjsyuen/diy_db_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" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3782a5a6b9c1122c0e354ef3c5c76c5bdc881374546b864a58e293366427f8e9
[INFO] running `Command { std: "docker" "start" "-a" "3782a5a6b9c1122c0e354ef3c5c76c5bdc881374546b864a58e293366427f8e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3782a5a6b9c1122c0e354ef3c5c76c5bdc881374546b864a58e293366427f8e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3782a5a6b9c1122c0e354ef3c5c76c5bdc881374546b864a58e293366427f8e9", kill_on_drop: false }`
[INFO] [stdout] 3782a5a6b9c1122c0e354ef3c5c76c5bdc881374546b864a58e293366427f8e9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:c80049f3b88b82089a44e0f06d0d6029d44b96b7257e55a1cd63dbc9f4c33334" "/opt/rustwide/cargo-home/bin/cargo" "+b2728d5426bab1d8c39709768c7e22b7f66dde5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bfd0e7012ba62e4b32899dd396ceaabee5b5f217dc97ca3e67138540dcc6ac60
[INFO] running `Command { std: "docker" "start" "-a" "bfd0e7012ba62e4b32899dd396ceaabee5b5f217dc97ca3e67138540dcc6ac60", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.75
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling anyhow v1.0.79
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking bytes v1.5.0
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]     Checking memmap2 v0.9.3
[INFO] [stderr]    Compiling zerocopy-derive v0.7.32
[INFO] [stderr]     Checking zerocopy v0.7.32
[INFO] [stderr]     Checking diy-db-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `BNODE_NODE` should have an upper camel case name
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     BNODE_NODE = 1,
[INFO] [stdout]    |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `BnodeNode`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `BNODE_LEAF` should have an upper camel case name
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     BNODE_LEAF = 2, // leaf nodes with values
[INFO] [stdout]    |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `BnodeLeaf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `BNODE_NODE` should have an upper camel case name
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 |     BNODE_NODE = 1,
[INFO] [stdout]    |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `BnodeNode`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `BNODE_LEAF` should have an upper camel case name
[INFO] [stdout]   --> src/main.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     BNODE_LEAF = 2, // leaf nodes with values
[INFO] [stdout]    |     ^^^^^^^^^^ help: convert the identifier to upper camel case: `BnodeLeaf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nodeID`
[INFO] [stdout]   --> src/main.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn get(nodeID: u64) -> BNode { // dereference a pointer
[INFO] [stdout]    |            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_nodeID`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/main.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn new(node: BNode) -> u64 {  // allocate a new page
[INFO] [stdout]    |            ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nodeID`
[INFO] [stdout]   --> src/main.rs:98:12
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn del(nodeID: u64) -> Result<(), anyhow::Error> { // deallocate a page
[INFO] [stdout]    |            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_nodeID`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `HEADER` is never used
[INFO] [stdout]   --> src/main.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const HEADER: usize = 4;
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BTREE_PAGE_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const BTREE_PAGE_SIZE: u16 = 4096;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BTREE_MAX_KEY_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 | const BTREE_MAX_KEY_SIZE: u16 = 1000;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BTREE_MAX_VAL_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const BTREE_MAX_VAL_SIZE: u16 = 3000;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `NodeType` is never used
[INFO] [stdout]   --> src/main.rs:15:6
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum NodeType {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BNode` is never constructed
[INFO] [stdout]   --> src/main.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct BNode {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/main.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl BNode {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 26 |     fn btype(&self) -> u16 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn nkeys(&self) -> u16 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |     fn setHeader(&mut self, btype: u16, nkeys: u16) -> Result<(), anyhow::Error> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn getPtr(&self, idx: u16) -> u64 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn setPtr(&mut self, idx: u16, val: u64) -> Result<(), anyhow::Error> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn offsetPos(node: &BNode, idx: u16) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     fn getOffset(&self, idx: u16) -> u16 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     fn setOffset(&mut self, idx: u16, offset: u16) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BTree` is never constructed
[INFO] [stdout]   --> src/main.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | struct BTree {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `get`, `new`, and `del` are never used
[INFO] [stdout]   --> src/main.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 91 | impl BTree {
[INFO] [stdout]    | ---------- associated functions in this implementation
[INFO] [stdout] 92 |     fn get(nodeID: u64) -> BNode { // dereference a pointer
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     fn new(node: BNode) -> u64 {  // allocate a new page
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 98 |     fn del(nodeID: u64) -> Result<(), anyhow::Error> { // deallocate a page
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `setHeader` should have a snake case name
[INFO] [stdout]   --> src/main.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 |     fn setHeader(&mut self, btype: u16, nkeys: u16) -> Result<(), anyhow::Error> {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `set_header`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `getPtr` should have a snake case name
[INFO] [stdout]   --> src/main.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn getPtr(&self, idx: u16) -> u64 {
[INFO] [stdout]    |        ^^^^^^ help: convert the identifier to snake case: `get_ptr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `setPtr` should have a snake case name
[INFO] [stdout]   --> src/main.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn setPtr(&mut self, idx: u16, val: u64) -> Result<(), anyhow::Error> {
[INFO] [stdout]    |        ^^^^^^ help: convert the identifier to snake case: `set_ptr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `offsetPos` should have a snake case name
[INFO] [stdout]   --> src/main.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn offsetPos(node: &BNode, idx: u16) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `offset_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `getOffset` should have a snake case name
[INFO] [stdout]   --> src/main.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn getOffset(&self, idx: u16) -> u16 {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `get_offset`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `setOffset` should have a snake case name
[INFO] [stdout]   --> src/main.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn setOffset(&mut self, idx: u16, offset: u16) {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `set_offset`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `nodeID` should have a snake case name
[INFO] [stdout]   --> src/main.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn get(nodeID: u64) -> BNode { // dereference a pointer
[INFO] [stdout]    |            ^^^^^^ help: convert the identifier to snake case: `node_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `nodeID` should have a snake case name
[INFO] [stdout]   --> src/main.rs:98:12
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn del(nodeID: u64) -> Result<(), anyhow::Error> { // deallocate a page
[INFO] [stdout]    |            ^^^^^^ help: convert the identifier to snake case: `node_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nodeID`
[INFO] [stdout]   --> src/main.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn get(nodeID: u64) -> BNode { // dereference a pointer
[INFO] [stdout]    |            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_nodeID`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `node`
[INFO] [stdout]   --> src/main.rs:95:12
[INFO] [stdout]    |
[INFO] [stdout] 95 |     fn new(node: BNode) -> u64 {  // allocate a new page
[INFO] [stdout]    |            ^^^^ help: if this is intentional, prefix it with an underscore: `_node`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nodeID`
[INFO] [stdout]   --> src/main.rs:98:12
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn del(nodeID: u64) -> Result<(), anyhow::Error> { // deallocate a page
[INFO] [stdout]    |            ^^^^^^ help: if this is intentional, prefix it with an underscore: `_nodeID`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `HEADER` is never used
[INFO] [stdout]   --> src/main.rs:10:7
[INFO] [stdout]    |
[INFO] [stdout] 10 | const HEADER: usize = 4;
[INFO] [stdout]    |       ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BTREE_PAGE_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | const BTREE_PAGE_SIZE: u16 = 4096;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BTREE_MAX_KEY_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:12:7
[INFO] [stdout]    |
[INFO] [stdout] 12 | const BTREE_MAX_KEY_SIZE: u16 = 1000;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BTREE_MAX_VAL_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:13:7
[INFO] [stdout]    |
[INFO] [stdout] 13 | const BTREE_MAX_VAL_SIZE: u16 = 3000;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `NodeType` is never used
[INFO] [stdout]   --> src/main.rs:15:6
[INFO] [stdout]    |
[INFO] [stdout] 15 | enum NodeType {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BNode` is never constructed
[INFO] [stdout]   --> src/main.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct BNode {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/main.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl BNode {
[INFO] [stdout]    | ---------- associated items in this implementation
[INFO] [stdout] 26 |     fn btype(&self) -> u16 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |     fn nkeys(&self) -> u16 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |     fn setHeader(&mut self, btype: u16, nkeys: u16) -> Result<(), anyhow::Error> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn getPtr(&self, idx: u16) -> u64 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |     fn setPtr(&mut self, idx: u16, val: u64) -> Result<(), anyhow::Error> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 48 |     fn offsetPos(node: &BNode, idx: u16) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 53 |     fn getOffset(&self, idx: u16) -> u16 {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 |     fn setOffset(&mut self, idx: u16, offset: u16) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `BTree` is never constructed
[INFO] [stdout]   --> src/main.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | struct BTree {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `get`, `new`, and `del` are never used
[INFO] [stdout]   --> src/main.rs:92:8
[INFO] [stdout]    |
[INFO] [stdout] 91 | impl BTree {
[INFO] [stdout]    | ---------- associated functions in this implementation
[INFO] [stdout] 92 |     fn get(nodeID: u64) -> BNode { // dereference a pointer
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |     fn new(node: BNode) -> u64 {  // allocate a new page
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 98 |     fn del(nodeID: u64) -> Result<(), anyhow::Error> { // deallocate a page
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `setHeader` should have a snake case name
[INFO] [stdout]   --> src/main.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 |     fn setHeader(&mut self, btype: u16, nkeys: u16) -> Result<(), anyhow::Error> {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `set_header`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `getPtr` should have a snake case name
[INFO] [stdout]   --> src/main.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn getPtr(&self, idx: u16) -> u64 {
[INFO] [stdout]    |        ^^^^^^ help: convert the identifier to snake case: `get_ptr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `setPtr` should have a snake case name
[INFO] [stdout]   --> src/main.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn setPtr(&mut self, idx: u16, val: u64) -> Result<(), anyhow::Error> {
[INFO] [stdout]    |        ^^^^^^ help: convert the identifier to snake case: `set_ptr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `offsetPos` should have a snake case name
[INFO] [stdout]   --> src/main.rs:48:8
[INFO] [stdout]    |
[INFO] [stdout] 48 |     fn offsetPos(node: &BNode, idx: u16) -> usize {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `offset_pos`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `getOffset` should have a snake case name
[INFO] [stdout]   --> src/main.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn getOffset(&self, idx: u16) -> u16 {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `get_offset`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `setOffset` should have a snake case name
[INFO] [stdout]   --> src/main.rs:62:8
[INFO] [stdout]    |
[INFO] [stdout] 62 |     fn setOffset(&mut self, idx: u16, offset: u16) {
[INFO] [stdout]    |        ^^^^^^^^^ help: convert the identifier to snake case: `set_offset`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `nodeID` should have a snake case name
[INFO] [stdout]   --> src/main.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 92 |     fn get(nodeID: u64) -> BNode { // dereference a pointer
[INFO] [stdout]    |            ^^^^^^ help: convert the identifier to snake case: `node_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `nodeID` should have a snake case name
[INFO] [stdout]   --> src/main.rs:98:12
[INFO] [stdout]    |
[INFO] [stdout] 98 |     fn del(nodeID: u64) -> Result<(), anyhow::Error> { // deallocate a page
[INFO] [stdout]    |            ^^^^^^ help: convert the identifier to snake case: `node_id`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.38s
[INFO] running `Command { std: "docker" "inspect" "bfd0e7012ba62e4b32899dd396ceaabee5b5f217dc97ca3e67138540dcc6ac60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfd0e7012ba62e4b32899dd396ceaabee5b5f217dc97ca3e67138540dcc6ac60", kill_on_drop: false }`
[INFO] [stdout] bfd0e7012ba62e4b32899dd396ceaabee5b5f217dc97ca3e67138540dcc6ac60