[INFO] updating cached repository https://github.com/qinxiaoguang/rs-lc
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/qinxiaoguang/rs-lc
[INFO] [stderr]    a1b18a3..a2fcec2  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a2fcec229200b0de09e09f6616469b2a5774098d
[INFO] checking qinxiaoguang/rs-lc against master#783139bd8fc3b94fac9a1bf81bba2c506e8221b6 for pr-72644
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqinxiaoguang%2Frs-lc" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/qinxiaoguang/rs-lc on toolchain 783139bd8fc3b94fac9a1bf81bba2c506e8221b6
[INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/qinxiaoguang/rs-lc
[INFO] finished tweaking git repo https://github.com/qinxiaoguang/rs-lc
[INFO] tweaked toml for git repo https://github.com/qinxiaoguang/rs-lc written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/qinxiaoguang/rs-lc already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a98a947664b781fbba55a8bda4301b99d97b407f1f7b258e7224f01470655785
[INFO] running `"docker" "start" "-a" "a98a947664b781fbba55a8bda4301b99d97b407f1f7b258e7224f01470655785"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking rs-lc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]  --> src/solution/l049.rs:2:33
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                                 ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/solution/l049.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | / macro_rules! sf {
[INFO] [stderr] 5 | |     ($str:expr) => {
[INFO] [stderr] 6 | |         String::from($str)
[INFO] [stderr] 7 | |     };
[INFO] [stderr] 8 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l049.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HashSet`
[INFO] [stderr]  --> src/solution/l049.rs:2:33
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::{HashMap, HashSet};
[INFO] [stderr]   |                                 ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/solution/l049.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | / macro_rules! set {
[INFO] [stderr] 25 | |     ($($k:expr),*) => {
[INFO] [stderr] 26 | |         {
[INFO] [stderr] 27 | |             let mut set = HashSet::new();
[INFO] [stderr] ...  |
[INFO] [stderr] 33 | |     };
[INFO] [stderr] 34 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l049.rs:14:17
[INFO] [stderr]    |
[INFO] [stderr] 14 |             let mut map = HashMap::new();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 45 |         let mut m = map![];
[INFO] [stderr]    |                     ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/solution/l049.rs:14:17
[INFO] [stderr]    |
[INFO] [stderr] 14 |             let mut map = HashMap::new();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] ...
[INFO] [stderr] 45 |         let mut m = map![];
[INFO] [stderr]    |                     ------ in this macro invocation
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.37s
[INFO] running `"docker" "inspect" "a98a947664b781fbba55a8bda4301b99d97b407f1f7b258e7224f01470655785"`
[INFO] running `"docker" "rm" "-f" "a98a947664b781fbba55a8bda4301b99d97b407f1f7b258e7224f01470655785"`
[INFO] [stdout] a98a947664b781fbba55a8bda4301b99d97b407f1f7b258e7224f01470655785