[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-1.37-6/sources/1.36.0/gh/noname007/leetcode-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/noname007/leetcode-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/noname007/leetcode-rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/noname007/leetcode-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/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 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of noname007/leetcode-rust 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 noname007/leetcode-rust
[INFO] finished frobbing noname007/leetcode-rust
[INFO] frobbed toml for noname007/leetcode-rust written to work/ex/beta-1.37-6/sources/1.36.0/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-1.37-6/sources/beta-2019-07-23/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" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing noname007/leetcode-rust against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] d3621c2d60ff4eb63f20094a8dac59a7d5e2971d770c64d9e9d2364e199b35cf
[INFO] running `"docker" "start" "-a" "d3621c2d60ff4eb63f20094a8dac59a7d5e2971d770c64d9e9d2364e199b35cf"`
[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 0.94s
[INFO] running `"docker" "inspect" "d3621c2d60ff4eb63f20094a8dac59a7d5e2971d770c64d9e9d2364e199b35cf"`
[INFO] running `"docker" "rm" "-f" "d3621c2d60ff4eb63f20094a8dac59a7d5e2971d770c64d9e9d2364e199b35cf"`
[INFO] [stdout] d3621c2d60ff4eb63f20094a8dac59a7d5e2971d770c64d9e9d2364e199b35cf
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 5d4261293b0ad91f5799b28a3d88314607a955a8636c57da4384e8f2280ed040
[INFO] running `"docker" "start" "-a" "5d4261293b0ad91f5799b28a3d88314607a955a8636c57da4384e8f2280ed040"`
[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 0.84s
[INFO] running `"docker" "inspect" "5d4261293b0ad91f5799b28a3d88314607a955a8636c57da4384e8f2280ed040"`
[INFO] running `"docker" "rm" "-f" "5d4261293b0ad91f5799b28a3d88314607a955a8636c57da4384e8f2280ed040"`
[INFO] [stdout] 5d4261293b0ad91f5799b28a3d88314607a955a8636c57da4384e8f2280ed040
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 4d1d08963e1dadf075d8b84c879ce78a77bfbdc3d57f1cfa6555b8152be9fe70
[INFO] running `"docker" "start" "-a" "4d1d08963e1dadf075d8b84c879ce78a77bfbdc3d57f1cfa6555b8152be9fe70"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_leetcode-e19831da33304a1e
[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" "4d1d08963e1dadf075d8b84c879ce78a77bfbdc3d57f1cfa6555b8152be9fe70"`
[INFO] running `"docker" "rm" "-f" "4d1d08963e1dadf075d8b84c879ce78a77bfbdc3d57f1cfa6555b8152be9fe70"`
[INFO] [stdout] 4d1d08963e1dadf075d8b84c879ce78a77bfbdc3d57f1cfa6555b8152be9fe70