[INFO] updating cached repository justinbarclay/diff
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/justinbarclay/diff
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/justinbarclay/diff" "work/ex/beta-1.38-1/sources/1.37.0/gh/justinbarclay/diff"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/justinbarclay/diff'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/justinbarclay/diff" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/justinbarclay/diff"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/justinbarclay/diff'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b474157f4d0d2d2c667ba0bd8f2457eda8ef12e
[INFO] sha for GitHub repo justinbarclay/diff: 3b474157f4d0d2d2c667ba0bd8f2457eda8ef12e
[INFO] validating manifest of justinbarclay/diff 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 justinbarclay/diff 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 justinbarclay/diff
[INFO] finished frobbing justinbarclay/diff
[INFO] frobbed toml for justinbarclay/diff written to work/ex/beta-1.38-1/sources/1.37.0/gh/justinbarclay/diff/Cargo.toml
[INFO] started frobbing justinbarclay/diff
[INFO] finished frobbing justinbarclay/diff
[INFO] frobbed toml for justinbarclay/diff written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/justinbarclay/diff/Cargo.toml
[INFO] crate justinbarclay/diff 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 justinbarclay/diff 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/justinbarclay/diff:/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] 00195b6546c9da5abd7a8cf016614913af17bc2e43c70e0ef467d09621132bb3
[INFO] running `"docker" "start" "-a" "00195b6546c9da5abd7a8cf016614913af17bc2e43c70e0ef467d09621132bb3"`
[INFO] [stderr]    Compiling rdiff v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `get`
[INFO] [stderr]   --> src/negative_array.rs:52:3
[INFO] [stderr]    |
[INFO] [stderr] 52 |   pub fn get(&self, offset: isize) -> isize {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `set`
[INFO] [stderr]   --> src/negative_array.rs:62:3
[INFO] [stderr]    |
[INFO] [stderr] 62 |   pub fn set(&mut self, offset: isize, value: isize) -> &mut NegativeArray {
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.48s
[INFO] running `"docker" "inspect" "00195b6546c9da5abd7a8cf016614913af17bc2e43c70e0ef467d09621132bb3"`
[INFO] running `"docker" "rm" "-f" "00195b6546c9da5abd7a8cf016614913af17bc2e43c70e0ef467d09621132bb3"`
[INFO] [stdout] 00195b6546c9da5abd7a8cf016614913af17bc2e43c70e0ef467d09621132bb3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/justinbarclay/diff:/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] 78a469fe94d1e1eb429ebee8260c8524f0b978e1e3c1660084d1abaa58aff880
[INFO] running `"docker" "start" "-a" "78a469fe94d1e1eb429ebee8260c8524f0b978e1e3c1660084d1abaa58aff880"`
[INFO] [stderr]    Compiling rdiff v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.11s
[INFO] running `"docker" "inspect" "78a469fe94d1e1eb429ebee8260c8524f0b978e1e3c1660084d1abaa58aff880"`
[INFO] running `"docker" "rm" "-f" "78a469fe94d1e1eb429ebee8260c8524f0b978e1e3c1660084d1abaa58aff880"`
[INFO] [stdout] 78a469fe94d1e1eb429ebee8260c8524f0b978e1e3c1660084d1abaa58aff880
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/justinbarclay/diff:/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] 940aa21c5bff7db59dbf28f196f169fa415fe0078f1eb2e24c49e50ae97fd2ed
[INFO] running `"docker" "start" "-a" "940aa21c5bff7db59dbf28f196f169fa415fe0078f1eb2e24c49e50ae97fd2ed"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rdiff-79d4f9e1de2a004e
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test diff::tests::gen_edit_graph ... ok
[INFO] [stdout] test diff::tests::gen_edit_graph_without_newlines ... ok
[INFO] [stdout] test diff::tests::gen_an_edit_sequence_for_a_diff_of_zero ... ok
[INFO] [stdout] test diff::tests::a_short_squence_where_they_are_the_same ... ok
[INFO] [stdout] test diff::tests::short_edit_sequence_for_empty_string ... ok
[INFO] [stdout] test diff::tests::greedy_diff ... ok
[INFO] [stdout] test diff::tests::short_edit_sequence_where_nothing_matches ... ok
[INFO] [stdout] test diff::tests::short_edit_sequence ... ok
[INFO] [stdout] test negative_array::tests::using_get_and_set ... ok
[INFO] [stdout] test negative_array::tests::indexing_an_array ... ok
[INFO] [stdout] test negative_array::tests::creating_a_new_array ... ok
[INFO] [stdout] test diff::tests::split_string_hello ... ok
[INFO] [stdout] test diff::tests::short_edit_sequence_where_they_are_the_same ... ok
[INFO] [stdout] test diff::tests::short_edit_sequence_without_newlines ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "940aa21c5bff7db59dbf28f196f169fa415fe0078f1eb2e24c49e50ae97fd2ed"`
[INFO] running `"docker" "rm" "-f" "940aa21c5bff7db59dbf28f196f169fa415fe0078f1eb2e24c49e50ae97fd2ed"`
[INFO] [stdout] 940aa21c5bff7db59dbf28f196f169fa415fe0078f1eb2e24c49e50ae97fd2ed