[INFO] updating cached repository euclidr/leetcode
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/euclidr/leetcode
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/euclidr/leetcode" "work/ex/beta-1.38-1/sources/1.37.0/gh/euclidr/leetcode"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/euclidr/leetcode'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/euclidr/leetcode" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/euclidr/leetcode"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of euclidr/leetcode on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing euclidr/leetcode against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] b9fb0f252917db56c68518305cec0d47bb32e6283470ebc67aba46b6499da426
[INFO] running `"docker" "start" "-a" "b9fb0f252917db56c68518305cec0d47bb32e6283470ebc67aba46b6499da426"`
[INFO] [stderr] warning: unused manifest key: examples
[INFO] [stderr]    Compiling libc v0.2.59
[INFO] [stderr]    Compiling spin v0.5.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling rand_chacha v0.2.0
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling getrandom v0.1.6
[INFO] [stderr]    Compiling rand_core v0.5.0
[INFO] [stderr]    Compiling rand v0.7.0
[INFO] [stderr]    Compiling leetcode v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.54s
[INFO] running `"docker" "inspect" "b9fb0f252917db56c68518305cec0d47bb32e6283470ebc67aba46b6499da426"`
[INFO] running `"docker" "rm" "-f" "b9fb0f252917db56c68518305cec0d47bb32e6283470ebc67aba46b6499da426"`
[INFO] [stdout] b9fb0f252917db56c68518305cec0d47bb32e6283470ebc67aba46b6499da426
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 63822b95dd946c9451d0bcb366623e81678e0c602426a36ff103c84f5eab1b7d
[INFO] running `"docker" "start" "-a" "63822b95dd946c9451d0bcb366623e81678e0c602426a36ff103c84f5eab1b7d"`
[INFO] [stderr] warning: unused manifest key: examples
[INFO] [stderr]    Compiling leetcode v0.1.0 (/opt/crater/workdir)
[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] 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]     Finished dev [unoptimized + debuginfo] target(s) in 17.21s
[INFO] running `"docker" "inspect" "63822b95dd946c9451d0bcb366623e81678e0c602426a36ff103c84f5eab1b7d"`
[INFO] running `"docker" "rm" "-f" "63822b95dd946c9451d0bcb366623e81678e0c602426a36ff103c84f5eab1b7d"`
[INFO] [stdout] 63822b95dd946c9451d0bcb366623e81678e0c602426a36ff103c84f5eab1b7d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] d5bb361f835be78c76b1c3467a56c5748bab25a9c9ed535b74e93ae8c4ad930f
[INFO] running `"docker" "start" "-a" "d5bb361f835be78c76b1c3467a56c5748bab25a9c9ed535b74e93ae8c4ad930f"`
[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-2bf8ea96ffceeb27
[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" "d5bb361f835be78c76b1c3467a56c5748bab25a9c9ed535b74e93ae8c4ad930f"`
[INFO] running `"docker" "rm" "-f" "d5bb361f835be78c76b1c3467a56c5748bab25a9c9ed535b74e93ae8c4ad930f"`
[INFO] [stdout] d5bb361f835be78c76b1c3467a56c5748bab25a9c9ed535b74e93ae8c4ad930f