[INFO] updating cached repository alexlai97/sorting_algorithm_demos
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/alexlai97/sorting_algorithm_demos
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/alexlai97/sorting_algorithm_demos" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/alexlai97/sorting_algorithm_demos"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/alexlai97/sorting_algorithm_demos'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alexlai97/sorting_algorithm_demos" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/alexlai97/sorting_algorithm_demos"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/alexlai97/sorting_algorithm_demos'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3bdfa390213822847cbb774117f87727f431825e
[INFO] sha for GitHub repo alexlai97/sorting_algorithm_demos: 3bdfa390213822847cbb774117f87727f431825e
[INFO] validating manifest of alexlai97/sorting_algorithm_demos on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of alexlai97/sorting_algorithm_demos on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing alexlai97/sorting_algorithm_demos
[INFO] finished frobbing alexlai97/sorting_algorithm_demos
[INFO] frobbed toml for alexlai97/sorting_algorithm_demos written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/alexlai97/sorting_algorithm_demos/Cargo.toml
[INFO] started frobbing alexlai97/sorting_algorithm_demos
[INFO] finished frobbing alexlai97/sorting_algorithm_demos
[INFO] frobbed toml for alexlai97/sorting_algorithm_demos written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/alexlai97/sorting_algorithm_demos/Cargo.toml
[INFO] crate alexlai97/sorting_algorithm_demos already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking alexlai97/sorting_algorithm_demos against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-7/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/alexlai97/sorting_algorithm_demos:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 628c43ea73d1e4437251bb365c74ceebac770756b2ce3d616d3f3dcfa97dfc8a
[INFO] running `"docker" "start" "-a" "628c43ea73d1e4437251bb365c74ceebac770756b2ce3d616d3f3dcfa97dfc8a"`
[INFO] [stderr]     Checking sorting_algs_demos v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `self::Node::*`
[INFO] [stderr]  --> src/binarytreesort.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use self::Node::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/binarytreesort.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn binarytreesort(mut array: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]   |                       ----^^^^^
[INFO] [stderr]   |                       |
[INFO] [stderr]   |                       help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Node`
[INFO] [stderr]   --> src/binarytreesort.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | enum Node {
[INFO] [stderr]    | ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `self::Node::*`
[INFO] [stderr]  --> src/binarytreesort.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use self::Node::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/binarytreesort.rs:3:23
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn binarytreesort(mut array: Vec<i32>) -> Vec<i32> {
[INFO] [stderr]   |                       ----^^^^^
[INFO] [stderr]   |                       |
[INFO] [stderr]   |                       help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Node`
[INFO] [stderr]   --> src/binarytreesort.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | enum Node {
[INFO] [stderr]    | ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `"docker" "inspect" "628c43ea73d1e4437251bb365c74ceebac770756b2ce3d616d3f3dcfa97dfc8a"`
[INFO] running `"docker" "rm" "-f" "628c43ea73d1e4437251bb365c74ceebac770756b2ce3d616d3f3dcfa97dfc8a"`
[INFO] [stdout] 628c43ea73d1e4437251bb365c74ceebac770756b2ce3d616d3f3dcfa97dfc8a