[INFO] cloning repository https://github.com/minsbee/date_structures_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/minsbee/date_structures_in_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fminsbee%2Fdate_structures_in_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fminsbee%2Fdate_structures_in_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1f50f8f319229890153322d5a77125773ec1ec49
[INFO] checking minsbee/date_structures_in_rust against master#e1613686e0efc80a1a18b1263625450a8de3fb04 for pr-154492-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fminsbee%2Fdate_structures_in_rust" "/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/minsbee/date_structures_in_rust
[INFO] finished tweaking git repo https://github.com/minsbee/date_structures_in_rust
[INFO] tweaked toml for git repo https://github.com/minsbee/date_structures_in_rust written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/minsbee/date_structures_in_rust on toolchain e1613686e0efc80a1a18b1263625450a8de3fb04
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/minsbee/date_structures_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" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7a80fe574169b90a679eab8b2c7c5af63a445531d856916acd0b6fac166610b3
[INFO] running `Command { std: "docker" "start" "-a" "7a80fe574169b90a679eab8b2c7c5af63a445531d856916acd0b6fac166610b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a80fe574169b90a679eab8b2c7c5af63a445531d856916acd0b6fac166610b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a80fe574169b90a679eab8b2c7c5af63a445531d856916acd0b6fac166610b3", kill_on_drop: false }`
[INFO] [stdout] 7a80fe574169b90a679eab8b2c7c5af63a445531d856916acd0b6fac166610b3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+e1613686e0efc80a1a18b1263625450a8de3fb04" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3873119714d99e3d284313384cb5a12f4cfec691f61b63c2495cb83c8270bd62
[INFO] running `Command { std: "docker" "start" "-a" "3873119714d99e3d284313384cb5a12f4cfec691f61b63c2495cb83c8270bd62", kill_on_drop: false }`
[INFO] [stderr]     Checking data_structures_in_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/ch01_array_and_vector/sec02_basic_vector.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut v2 = vec![1, 2, 3, 4, 5];
[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/ch01_array_and_vector/sec02_basic_vector.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut v2 = vec![1, 2, 3, 4, 5];
[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/ch01_array_and_vector/sec03_access_and_iterate_vector.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut vec1 = vec![10, 20, 30, 40, 50];
[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/ch01_array_and_vector/sec03_access_and_iterate_vector.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut vec1 = vec![10, 20, 30, 40, 50];
[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/ch01_array_and_vector/two_sum.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut a: usize = 0;
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/ch01_array_and_vector/two_sum.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     for i in 0..nums.len() {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/ch01_array_and_vector/two_sum.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut a: usize = 0;
[INFO] [stdout]   |         ----^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/ch01_array_and_vector/sec01_basic_array.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/ch01_array_and_vector/sec02_basic_vector.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/ch01_array_and_vector/two_sum.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     for i in 0..nums.len() {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum` is never used
[INFO] [stdout]  --> src/ch01_array_and_vector/two_sum.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/ch01_array_and_vector/two_sum.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/ch01_array_and_vector/sec01_basic_array.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> src/ch01_array_and_vector/sec02_basic_vector.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn main() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_sum` is never used
[INFO] [stdout]  --> src/ch01_array_and_vector/two_sum.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn two_sum(nums: Vec<i32>, target: i32) -> Vec<i32> {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> src/ch01_array_and_vector/two_sum.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 28 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "3873119714d99e3d284313384cb5a12f4cfec691f61b63c2495cb83c8270bd62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3873119714d99e3d284313384cb5a12f4cfec691f61b63c2495cb83c8270bd62", kill_on_drop: false }`
[INFO] [stdout] 3873119714d99e3d284313384cb5a12f4cfec691f61b63c2495cb83c8270bd62