[INFO] updating cached repository green4free/binary_search_tree
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/green4free/binary_search_tree
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/green4free/binary_search_tree" "work/ex/beta-1.37-6/sources/1.36.0/gh/green4free/binary_search_tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/green4free/binary_search_tree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/green4free/binary_search_tree" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/green4free/binary_search_tree"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/green4free/binary_search_tree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c8a7034fe1006e71dc5ca5cccc0b05d7cfda50d9
[INFO] sha for GitHub repo green4free/binary_search_tree: c8a7034fe1006e71dc5ca5cccc0b05d7cfda50d9
[INFO] validating manifest of green4free/binary_search_tree 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 green4free/binary_search_tree 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 green4free/binary_search_tree
[INFO] finished frobbing green4free/binary_search_tree
[INFO] frobbed toml for green4free/binary_search_tree written to work/ex/beta-1.37-6/sources/1.36.0/gh/green4free/binary_search_tree/Cargo.toml
[INFO] started frobbing green4free/binary_search_tree
[INFO] finished frobbing green4free/binary_search_tree
[INFO] frobbed toml for green4free/binary_search_tree written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/green4free/binary_search_tree/Cargo.toml
[INFO] crate green4free/binary_search_tree 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 green4free/binary_search_tree 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-3/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/green4free/binary_search_tree:/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] 0bc2387e58c67a60e953973e0d5fca824ae3f2d3f7821de55850c313f3c9b25c
[INFO] running `"docker" "start" "-a" "0bc2387e58c67a60e953973e0d5fca824ae3f2d3f7821de55850c313f3c9b25c"`
[INFO] [stderr]    Compiling binary_search_tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/main.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |             Cons(data, ref left, ref right) => 1 + left.len() + right.len(),
[INFO] [stderr]    |                  ^^^^ help: consider prefixing with an underscore: `_data`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/main.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |             Cons(data, ref left, ref right) => {
[INFO] [stderr]    |                  ^^^^ help: consider prefixing with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `"docker" "inspect" "0bc2387e58c67a60e953973e0d5fca824ae3f2d3f7821de55850c313f3c9b25c"`
[INFO] running `"docker" "rm" "-f" "0bc2387e58c67a60e953973e0d5fca824ae3f2d3f7821de55850c313f3c9b25c"`
[INFO] [stdout] 0bc2387e58c67a60e953973e0d5fca824ae3f2d3f7821de55850c313f3c9b25c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/green4free/binary_search_tree:/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] 42198def2aaabbd092554e9fe3656d2a48ebbe896a8bbd2246a6e31c9edf2152
[INFO] running `"docker" "start" "-a" "42198def2aaabbd092554e9fe3656d2a48ebbe896a8bbd2246a6e31c9edf2152"`
[INFO] [stderr]    Compiling binary_search_tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/main.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |             Cons(data, ref left, ref right) => 1 + left.len() + right.len(),
[INFO] [stderr]    |                  ^^^^ help: consider prefixing with an underscore: `_data`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/main.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |             Cons(data, ref left, ref right) => {
[INFO] [stderr]    |                  ^^^^ help: consider prefixing with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
[INFO] running `"docker" "inspect" "42198def2aaabbd092554e9fe3656d2a48ebbe896a8bbd2246a6e31c9edf2152"`
[INFO] running `"docker" "rm" "-f" "42198def2aaabbd092554e9fe3656d2a48ebbe896a8bbd2246a6e31c9edf2152"`
[INFO] [stdout] 42198def2aaabbd092554e9fe3656d2a48ebbe896a8bbd2246a6e31c9edf2152
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/green4free/binary_search_tree:/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] 77c0a0015a04b451a36650f3814a9072a9d79306a3c9432529c58361230e812d
[INFO] running `"docker" "start" "-a" "77c0a0015a04b451a36650f3814a9072a9d79306a3c9432529c58361230e812d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/binary_search_tree-30eca396fe24c759
[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" "77c0a0015a04b451a36650f3814a9072a9d79306a3c9432529c58361230e812d"`
[INFO] running `"docker" "rm" "-f" "77c0a0015a04b451a36650f3814a9072a9d79306a3c9432529c58361230e812d"`
[INFO] [stdout] 77c0a0015a04b451a36650f3814a9072a9d79306a3c9432529c58361230e812d