[INFO] updating cached repository ollef/measured-splay-tree.rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ollef/measured-splay-tree.rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ollef/measured-splay-tree.rs" "work/ex/beta-1.38-1/sources/1.37.0/gh/ollef/measured-splay-tree.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/ollef/measured-splay-tree.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ollef/measured-splay-tree.rs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ollef/measured-splay-tree.rs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ollef/measured-splay-tree.rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 87238b3b7806ea48b05f521cb805ca885e77397a
[INFO] sha for GitHub repo ollef/measured-splay-tree.rs: 87238b3b7806ea48b05f521cb805ca885e77397a
[INFO] validating manifest of ollef/measured-splay-tree.rs 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 ollef/measured-splay-tree.rs 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 ollef/measured-splay-tree.rs
[INFO] finished frobbing ollef/measured-splay-tree.rs
[INFO] frobbed toml for ollef/measured-splay-tree.rs written to work/ex/beta-1.38-1/sources/1.37.0/gh/ollef/measured-splay-tree.rs/Cargo.toml
[INFO] started frobbing ollef/measured-splay-tree.rs
[INFO] finished frobbing ollef/measured-splay-tree.rs
[INFO] frobbed toml for ollef/measured-splay-tree.rs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/ollef/measured-splay-tree.rs/Cargo.toml
[INFO] crate ollef/measured-splay-tree.rs 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 ollef/measured-splay-tree.rs 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-4/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/ollef/measured-splay-tree.rs:/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] 5dbd567732bbed3568cb3e6389820b0cd50f972a5602469b306108936754ea4f
[INFO] running `"docker" "start" "-a" "5dbd567732bbed3568cb3e6389820b0cd50f972a5602469b306108936754ea4f"`
[INFO] [stderr]    Compiling measured-splay-tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: enum is never used: `SplitResult`
[INFO] [stderr]   --> src/main.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | enum SplitResult<M, T> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_empty`
[INFO] [stderr]   --> src/main.rs:97:5
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn is_empty(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `split`
[INFO] [stderr]    --> src/main.rs:148:5
[INFO] [stderr]     |
[INFO] [stderr] 148 |     fn split<F: Fn(&M) -> bool>(self, pred: F) -> SplitResult<M, T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `chars`
[INFO] [stderr]    --> src/main.rs:437:5
[INFO] [stderr]     |
[INFO] [stderr] 437 |     fn chars<'a>(&'a self) -> impl Iterator<Item = char> + 'a {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.37s
[INFO] running `"docker" "inspect" "5dbd567732bbed3568cb3e6389820b0cd50f972a5602469b306108936754ea4f"`
[INFO] running `"docker" "rm" "-f" "5dbd567732bbed3568cb3e6389820b0cd50f972a5602469b306108936754ea4f"`
[INFO] [stdout] 5dbd567732bbed3568cb3e6389820b0cd50f972a5602469b306108936754ea4f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/ollef/measured-splay-tree.rs:/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] c29e64375c7f2a3ea2fdc5e87b0167d774c598c32dd321b6170b0556b954a57f
[INFO] running `"docker" "start" "-a" "c29e64375c7f2a3ea2fdc5e87b0167d774c598c32dd321b6170b0556b954a57f"`
[INFO] [stderr]    Compiling measured-splay-tree v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: enum is never used: `SplitResult`
[INFO] [stderr]   --> src/main.rs:36:1
[INFO] [stderr]    |
[INFO] [stderr] 36 | enum SplitResult<M, T> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_empty`
[INFO] [stderr]   --> src/main.rs:97:5
[INFO] [stderr]    |
[INFO] [stderr] 97 |     fn is_empty(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `split`
[INFO] [stderr]    --> src/main.rs:148:5
[INFO] [stderr]     |
[INFO] [stderr] 148 |     fn split<F: Fn(&M) -> bool>(self, pred: F) -> SplitResult<M, T> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `chars`
[INFO] [stderr]    --> src/main.rs:437:5
[INFO] [stderr]     |
[INFO] [stderr] 437 |     fn chars<'a>(&'a self) -> impl Iterator<Item = char> + 'a {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `"docker" "inspect" "c29e64375c7f2a3ea2fdc5e87b0167d774c598c32dd321b6170b0556b954a57f"`
[INFO] running `"docker" "rm" "-f" "c29e64375c7f2a3ea2fdc5e87b0167d774c598c32dd321b6170b0556b954a57f"`
[INFO] [stdout] c29e64375c7f2a3ea2fdc5e87b0167d774c598c32dd321b6170b0556b954a57f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/ollef/measured-splay-tree.rs:/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] f7072eb7b0f710f3be294f96a6b1d921ad8c5659c7c916268232c39faacf3bc4
[INFO] running `"docker" "start" "-a" "f7072eb7b0f710f3be294f96a6b1d921ad8c5659c7c916268232c39faacf3bc4"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/measured_splay_tree-2b2ef3f972e957ab
[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" "f7072eb7b0f710f3be294f96a6b1d921ad8c5659c7c916268232c39faacf3bc4"`
[INFO] running `"docker" "rm" "-f" "f7072eb7b0f710f3be294f96a6b1d921ad8c5659c7c916268232c39faacf3bc4"`
[INFO] [stdout] f7072eb7b0f710f3be294f96a6b1d921ad8c5659c7c916268232c39faacf3bc4