[INFO] cloning repository https://github.com/MucTepDayH16/leet-code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MucTepDayH16/leet-code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMucTepDayH16%2Fleet-code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMucTepDayH16%2Fleet-code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 219df5a84c261149686f0c0ae49381671172d238
[INFO] checking MucTepDayH16/leet-code against try#1bd50d4315eb15970d395b6be5823f9384707693 for pr-140151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMucTepDayH16%2Fleet-code" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MucTepDayH16/leet-code on toolchain 1bd50d4315eb15970d395b6be5823f9384707693
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1bd50d4315eb15970d395b6be5823f9384707693" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MucTepDayH16/leet-code
[INFO] finished tweaking git repo https://github.com/MucTepDayH16/leet-code
[INFO] tweaked toml for git repo https://github.com/MucTepDayH16/leet-code written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/MucTepDayH16/leet-code 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" "+1bd50d4315eb15970d395b6be5823f9384707693" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1bd50d4315eb15970d395b6be5823f9384707693" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 06a532c453ba6dc9b5b204e83bfb19cc1e355e5f81f3f25f64ba6fa0ec19ca2c
[INFO] running `Command { std: "docker" "start" "-a" "06a532c453ba6dc9b5b204e83bfb19cc1e355e5f81f3f25f64ba6fa0ec19ca2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06a532c453ba6dc9b5b204e83bfb19cc1e355e5f81f3f25f64ba6fa0ec19ca2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06a532c453ba6dc9b5b204e83bfb19cc1e355e5f81f3f25f64ba6fa0ec19ca2c", kill_on_drop: false }`
[INFO] [stdout] 06a532c453ba6dc9b5b204e83bfb19cc1e355e5f81f3f25f64ba6fa0ec19ca2c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1bd50d4315eb15970d395b6be5823f9384707693" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 183108fe43a80669d0505dda69e977a1428376225d5c7ee9c97afab872171b30
[INFO] running `Command { std: "docker" "start" "-a" "183108fe43a80669d0505dda69e977a1428376225d5c7ee9c97afab872171b30", kill_on_drop: false }`
[INFO] [stderr]     Checking regular-expression-matching v0.1.0 (/opt/rustwide/workdir/regular-expression-matching)
[INFO] [stderr]     Checking group-anagrams v0.1.0 (/opt/rustwide/workdir/group-anagrams)
[INFO] [stdout] warning: unused imports: `BTreeSet` and `cmp::*`
[INFO] [stdout]  --> group-anagrams/src/main.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 |         collections::{BTreeMap, BTreeSet},
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout] 3 |         cmp::*,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BTreeSet` and `cmp::*`
[INFO] [stdout]  --> group-anagrams/src/main.rs:2:33
[INFO] [stdout]   |
[INFO] [stdout] 2 |         collections::{BTreeMap, BTreeSet},
[INFO] [stdout]   |                                 ^^^^^^^^
[INFO] [stdout] 3 |         cmp::*,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to `<[T; N] as IntoIterator>::into_iter` in Rust 2021
[INFO] [stdout]   --> group-anagrams/src/main.rs:33:21
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let strs = strs.into_iter().map(|s| s.to_string()).collect();
[INFO] [stdout]    |                     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 33 -     let strs = strs.into_iter().map(|s| s.to_string()).collect();
[INFO] [stdout] 33 +     let strs = strs.iter().map(|s| s.to_string()).collect();
[INFO] [stdout]    |
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 33 -     let strs = strs.into_iter().map(|s| s.to_string()).collect();
[INFO] [stdout] 33 +     let strs = IntoIterator::into_iter(strs).map(|s| s.to_string()).collect();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> regular-expression-matching/src/main.rs:116:32
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn is_match(s: String, mut p: String) -> bool {
[INFO] [stdout]     |                                ----^
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to `<[T; N] as IntoIterator>::into_iter` in Rust 2021
[INFO] [stdout]   --> group-anagrams/src/main.rs:33:21
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let strs = strs.into_iter().map(|s| s.to_string()).collect();
[INFO] [stdout]    |                     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/IntoIterator-for-arrays.html>
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 33 -     let strs = strs.into_iter().map(|s| s.to_string()).collect();
[INFO] [stdout] 33 +     let strs = strs.iter().map(|s| s.to_string()).collect();
[INFO] [stdout]    |
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 33 -     let strs = strs.into_iter().map(|s| s.to_string()).collect();
[INFO] [stdout] 33 +     let strs = IntoIterator::into_iter(strs).map(|s| s.to_string()).collect();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> regular-expression-matching/src/main.rs:116:32
[INFO] [stdout]     |
[INFO] [stdout] 116 |     pub fn is_match(s: String, mut p: String) -> bool {
[INFO] [stdout]     |                                ----^
[INFO] [stdout]     |                                |
[INFO] [stdout]     |                                help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "183108fe43a80669d0505dda69e977a1428376225d5c7ee9c97afab872171b30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "183108fe43a80669d0505dda69e977a1428376225d5c7ee9c97afab872171b30", kill_on_drop: false }`
[INFO] [stdout] 183108fe43a80669d0505dda69e977a1428376225d5c7ee9c97afab872171b30
