[INFO] cloning repository euclidr/leetcode
[INFO] running `"git" "clone" "--bare" "git://github.com/euclidr/leetcode.git" "work/cache/sources/gh/euclidr/leetcode"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/euclidr/leetcode'...
[INFO] running `"git" "clone" "work/cache/sources/gh/euclidr/leetcode" "work/ex/beta-1.37-6/sources/1.36.0/gh/euclidr/leetcode"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/euclidr/leetcode'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/euclidr/leetcode" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/euclidr/leetcode"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/euclidr/leetcode'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d0fd94dcead5f085970644d07296a5b8c8a093b4
[INFO] sha for GitHub repo euclidr/leetcode: d0fd94dcead5f085970644d07296a5b8c8a093b4
[INFO] validating manifest of euclidr/leetcode on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of euclidr/leetcode on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing euclidr/leetcode
[INFO] finished frobbing euclidr/leetcode
[INFO] frobbed toml for euclidr/leetcode written to work/ex/beta-1.37-6/sources/1.36.0/gh/euclidr/leetcode/Cargo.toml
[INFO] started frobbing euclidr/leetcode
[INFO] finished frobbing euclidr/leetcode
[INFO] frobbed toml for euclidr/leetcode written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/euclidr/leetcode/Cargo.toml
[INFO] crate euclidr/leetcode already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing euclidr/leetcode against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/euclidr/leetcode:/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=warn" "-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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 90c628871ad48c3915158ea6bb4b4fb246df885e6a62db159c5cab53119f67d8
[INFO] running `"docker" "start" "-a" "90c628871ad48c3915158ea6bb4b4fb246df885e6a62db159c5cab53119f67d8"`
[INFO] [stderr] warning: unused manifest key: examples
[INFO] [stderr]    Compiling leetcode v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "90c628871ad48c3915158ea6bb4b4fb246df885e6a62db159c5cab53119f67d8"`
[INFO] running `"docker" "rm" "-f" "90c628871ad48c3915158ea6bb4b4fb246df885e6a62db159c5cab53119f67d8"`
[INFO] [stdout] 90c628871ad48c3915158ea6bb4b4fb246df885e6a62db159c5cab53119f67d8
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/euclidr/leetcode:/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] be0745ffbe5a85fceb1cbd5cd2244af010a3c837becda245f0cb98ed326f2d53
[INFO] running `"docker" "start" "-a" "be0745ffbe5a85fceb1cbd5cd2244af010a3c837becda245f0cb98ed326f2d53"`
[INFO] [stderr] warning: unused manifest key: examples
[INFO] [stderr]    Compiling leetcode v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> examples/p710.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |         unreachable!()
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_code)] on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]   --> examples/p710.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn new(N: i32, mut blacklist: Vec<i32>) -> Self {
[INFO] [stderr]    |            ^ help: convert the identifier to snake case: `n`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Solution`
[INFO] [stderr]   --> examples/p437.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | struct Solution;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `path_sum`
[INFO] [stderr]   --> examples/p437.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     pub fn path_sum(root: Option<Rc<RefCell<TreeNode>>>, sum: i32) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.74s
[INFO] running `"docker" "inspect" "be0745ffbe5a85fceb1cbd5cd2244af010a3c837becda245f0cb98ed326f2d53"`
[INFO] running `"docker" "rm" "-f" "be0745ffbe5a85fceb1cbd5cd2244af010a3c837becda245f0cb98ed326f2d53"`
[INFO] [stdout] be0745ffbe5a85fceb1cbd5cd2244af010a3c837becda245f0cb98ed326f2d53
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/euclidr/leetcode:/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 80b6dab5c4834db0284432db12d53bf7785d78b6a05dc287b1a911f62bde0f92
[INFO] running `"docker" "start" "-a" "80b6dab5c4834db0284432db12d53bf7785d78b6a05dc287b1a911f62bde0f92"`
[INFO] [stderr] warning: unused manifest key: examples
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/leetcode-66ebbe289173deee
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "80b6dab5c4834db0284432db12d53bf7785d78b6a05dc287b1a911f62bde0f92"`
[INFO] running `"docker" "rm" "-f" "80b6dab5c4834db0284432db12d53bf7785d78b6a05dc287b1a911f62bde0f92"`
[INFO] [stdout] 80b6dab5c4834db0284432db12d53bf7785d78b6a05dc287b1a911f62bde0f92