[INFO] updating cached repository noname007/leetcode-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/noname007/leetcode-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/noname007/leetcode-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/noname007/leetcode-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/noname007/leetcode-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/noname007/leetcode-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/noname007/leetcode-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/noname007/leetcode-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0cd921992f6a749f136f368ebc88bf94626964ba
[INFO] sha for GitHub repo noname007/leetcode-rust: 0cd921992f6a749f136f368ebc88bf94626964ba
[INFO] validating manifest of noname007/leetcode-rust 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 noname007/leetcode-rust 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 noname007/leetcode-rust
[INFO] finished frobbing noname007/leetcode-rust
[INFO] frobbed toml for noname007/leetcode-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/noname007/leetcode-rust/Cargo.toml
[INFO] started frobbing noname007/leetcode-rust
[INFO] finished frobbing noname007/leetcode-rust
[INFO] frobbed toml for noname007/leetcode-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/noname007/leetcode-rust/Cargo.toml
[INFO] crate noname007/leetcode-rust 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 noname007/leetcode-rust against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/noname007/leetcode-rust:/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] a55efbe636ecd894282546d5630e3534389bfd67edb8396b985e81e0d4264e51
[INFO] running `"docker" "start" "-a" "a55efbe636ecd894282546d5630e3534389bfd67edb8396b985e81e0d4264e51"`
[INFO] [stderr]    Compiling rust-leetcode v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]  --> src/leetcode7.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let i = 100_i8;
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]   --> src/leetcode7.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn reverse(x: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "a55efbe636ecd894282546d5630e3534389bfd67edb8396b985e81e0d4264e51"`
[INFO] running `"docker" "rm" "-f" "a55efbe636ecd894282546d5630e3534389bfd67edb8396b985e81e0d4264e51"`
[INFO] [stdout] a55efbe636ecd894282546d5630e3534389bfd67edb8396b985e81e0d4264e51
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/noname007/leetcode-rust:/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4313f2961509bf924e86166009b3cfded902b221c07e04be29a9d6922d0f1a49
[INFO] running `"docker" "start" "-a" "4313f2961509bf924e86166009b3cfded902b221c07e04be29a9d6922d0f1a49"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust-leetcode v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]  --> src/leetcode7.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let i = 100_i8;
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reverse`
[INFO] [stderr]   --> src/leetcode7.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub fn reverse(x: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "4313f2961509bf924e86166009b3cfded902b221c07e04be29a9d6922d0f1a49"`
[INFO] running `"docker" "rm" "-f" "4313f2961509bf924e86166009b3cfded902b221c07e04be29a9d6922d0f1a49"`
[INFO] [stdout] 4313f2961509bf924e86166009b3cfded902b221c07e04be29a9d6922d0f1a49
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/noname007/leetcode-rust:/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-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 015b6c7b164f5ac198413eaafde6b49d6d208339b9ba87cf506a02721bc569f4
[INFO] running `"docker" "start" "-a" "015b6c7b164f5ac198413eaafde6b49d6d208339b9ba87cf506a02721bc569f4"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_leetcode-87b29673860e9976
[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" "015b6c7b164f5ac198413eaafde6b49d6d208339b9ba87cf506a02721bc569f4"`
[INFO] running `"docker" "rm" "-f" "015b6c7b164f5ac198413eaafde6b49d6d208339b9ba87cf506a02721bc569f4"`
[INFO] [stdout] 015b6c7b164f5ac198413eaafde6b49d6d208339b9ba87cf506a02721bc569f4