[INFO] cloning repository https://github.com/rusty-org/rusty-kv
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rusty-org/rusty-kv" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frusty-org%2Frusty-kv", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frusty-org%2Frusty-kv'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 569d6cd1d8bd23a22cf96da8635734292ff9c2d1
[INFO] checking rusty-org/rusty-kv against master#6eda7419e71fdbc1185ed5be7e6bff1a474ab5cd for pr-153721
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frusty-org%2Frusty-kv" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rusty-org/rusty-kv
[INFO] finished tweaking git repo https://github.com/rusty-org/rusty-kv
[INFO] tweaked toml for git repo https://github.com/rusty-org/rusty-kv written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rusty-org/rusty-kv on toolchain 6eda7419e71fdbc1185ed5be7e6bff1a474ab5cd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6eda7419e71fdbc1185ed5be7e6bff1a474ab5cd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rusty-org/rusty-kv 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" "+6eda7419e71fdbc1185ed5be7e6bff1a474ab5cd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] ad06e385840310dc7affe06379891d0c792d8c01ddedc0578b4de693accf05d6
[INFO] running `Command { std: "docker" "start" "ad06e385840310dc7affe06379891d0c792d8c01ddedc0578b4de693accf05d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ad06e385840310dc7affe06379891d0c792d8c01ddedc0578b4de693accf05d6" "/opt/rustwide/cargo-home/bin/cargo" "+6eda7419e71fdbc1185ed5be7e6bff1a474ab5cd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad06e385840310dc7affe06379891d0c792d8c01ddedc0578b4de693accf05d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ad06e385840310dc7affe06379891d0c792d8c01ddedc0578b4de693accf05d6" "/opt/rustwide/cargo-home/bin/cargo" "+6eda7419e71fdbc1185ed5be7e6bff1a474ab5cd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/commands/general/set.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     mut args: Vec<String>,
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/commands/general/set.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 |     mut args: Vec<String>,
[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: trait `Entity` is never used
[INFO] [stdout]   --> src/ds/mod.rs:15:11
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub trait Entity {
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KvHashMap` is never constructed
[INFO] [stdout]  --> src/ds/hmap.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct KvHashMap {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ds/hmap.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl KvHashMap {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] 10 |   pub fn new() -> Self {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KvSet` is never constructed
[INFO] [stdout]   --> src/ds/hset.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct KvSet {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ds/hset.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl KvSet {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 18 |   /// Creates a new empty set.
[INFO] [stdout] 19 |   pub fn new() -> Self {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KvLinkedList` is never constructed
[INFO] [stdout]   --> src/ds/llist.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct KvLinkedList {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push_front`, `push_back`, `pop_front`, and `pop_back` are never used
[INFO] [stdout]   --> src/ds/llist.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl KvLinkedList {
[INFO] [stdout]    | ----------------- associated items in this implementation
[INFO] [stdout] 16 |   /// Creates a new empty linked list.
[INFO] [stdout] 17 |   pub fn new() -> Self {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |   pub fn push_front(&mut self, value: String) {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |   pub fn push_back(&mut self, value: String) {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |   pub fn pop_front(&mut self) -> Option<String> {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |   pub fn pop_back(&mut self) -> Option<String> {
[INFO] [stdout]    |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KDB` is never constructed
[INFO] [stdout]  --> src/storage/kdb.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct KDB {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Entity` is never used
[INFO] [stdout]   --> src/ds/mod.rs:15:11
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub trait Entity {
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KvHashMap` is never constructed
[INFO] [stdout]  --> src/ds/hmap.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct KvHashMap {
[INFO] [stdout]   |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ds/hmap.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl KvHashMap {
[INFO] [stdout]    | -------------- associated function in this implementation
[INFO] [stdout] 10 |   pub fn new() -> Self {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KvSet` is never constructed
[INFO] [stdout]   --> src/ds/hset.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub struct KvSet {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/ds/hset.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl KvSet {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 18 |   /// Creates a new empty set.
[INFO] [stdout] 19 |   pub fn new() -> Self {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KvLinkedList` is never constructed
[INFO] [stdout]   --> src/ds/llist.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct KvLinkedList {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `push_front`, `push_back`, `pop_front`, and `pop_back` are never used
[INFO] [stdout]   --> src/ds/llist.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl KvLinkedList {
[INFO] [stdout]    | ----------------- associated items in this implementation
[INFO] [stdout] 16 |   /// Creates a new empty linked list.
[INFO] [stdout] 17 |   pub fn new() -> Self {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |   pub fn push_front(&mut self, value: String) {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |   pub fn push_back(&mut self, value: String) {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 34 |   pub fn pop_front(&mut self) -> Option<String> {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 39 |   pub fn pop_back(&mut self) -> Option<String> {
[INFO] [stdout]    |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `KDB` is never constructed
[INFO] [stdout]  --> src/storage/kdb.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct KDB {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.87s
[INFO] running `Command { std: "docker" "inspect" "ad06e385840310dc7affe06379891d0c792d8c01ddedc0578b4de693accf05d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad06e385840310dc7affe06379891d0c792d8c01ddedc0578b4de693accf05d6", kill_on_drop: false }`
[INFO] [stdout] ad06e385840310dc7affe06379891d0c792d8c01ddedc0578b4de693accf05d6
