[INFO] updating cached repository Fortunato28/imprecise-diff
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Fortunato28/imprecise-diff
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Fortunato28/imprecise-diff" "work/ex/beta-1.38-1/sources/1.37.0/gh/Fortunato28/imprecise-diff"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Fortunato28/imprecise-diff'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Fortunato28/imprecise-diff" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Fortunato28/imprecise-diff"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Fortunato28/imprecise-diff'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1c37826ffa25cecd878d2e61a18fb64c87dd244c
[INFO] sha for GitHub repo Fortunato28/imprecise-diff: 1c37826ffa25cecd878d2e61a18fb64c87dd244c
[INFO] validating manifest of Fortunato28/imprecise-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 Fortunato28/imprecise-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 Fortunato28/imprecise-diff
[INFO] finished frobbing Fortunato28/imprecise-diff
[INFO] frobbed toml for Fortunato28/imprecise-diff written to work/ex/beta-1.38-1/sources/1.37.0/gh/Fortunato28/imprecise-diff/Cargo.toml
[INFO] started frobbing Fortunato28/imprecise-diff
[INFO] finished frobbing Fortunato28/imprecise-diff
[INFO] frobbed toml for Fortunato28/imprecise-diff written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Fortunato28/imprecise-diff/Cargo.toml
[INFO] crate Fortunato28/imprecise-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 Fortunato28/imprecise-diff 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-2/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/Fortunato28/imprecise-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] a7917bcb2dd20fc96dbbdd55e2563a726b276912e525bf314e3c53943bace923
[INFO] running `"docker" "start" "-a" "a7917bcb2dd20fc96dbbdd55e2563a726b276912e525bf314e3c53943bace923"`
[INFO] [stderr]    Compiling distance v0.4.0
[INFO] [stderr]    Compiling imprecise-diff v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         fill_files_list(&mut current_dir);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:81:21
[INFO] [stderr]    |
[INFO] [stderr] 81 |                     fs::remove_file(result_file);
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:124:9
[INFO] [stderr]     |
[INFO] [stderr] 124 |         write!(&mut result_diff_file, "{}\n", line);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.55s
[INFO] running `"docker" "inspect" "a7917bcb2dd20fc96dbbdd55e2563a726b276912e525bf314e3c53943bace923"`
[INFO] running `"docker" "rm" "-f" "a7917bcb2dd20fc96dbbdd55e2563a726b276912e525bf314e3c53943bace923"`
[INFO] [stdout] a7917bcb2dd20fc96dbbdd55e2563a726b276912e525bf314e3c53943bace923
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/Fortunato28/imprecise-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] e805a91e5d9931fa4a259f74d54b4bf8f31dafc114edf92f45e7c885fa9d24a0
[INFO] running `"docker" "start" "-a" "e805a91e5d9931fa4a259f74d54b4bf8f31dafc114edf92f45e7c885fa9d24a0"`
[INFO] [stderr]    Compiling imprecise-diff v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `test_vec`
[INFO] [stderr]    --> src/main.rs:224:17
[INFO] [stderr]     |
[INFO] [stderr] 224 |         let mut test_vec: Vec<String> = Vec::new();
[INFO] [stderr]     |                 ^^^^^^^^ help: consider prefixing with an underscore: `_test_vec`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:224:13
[INFO] [stderr]     |
[INFO] [stderr] 224 |         let mut test_vec: Vec<String> = Vec::new();
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         fill_files_list(&mut current_dir);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/main.rs:81:21
[INFO] [stderr]    |
[INFO] [stderr] 81 |                     fs::remove_file(result_file);
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:124:9
[INFO] [stderr]     |
[INFO] [stderr] 124 |         write!(&mut result_diff_file, "{}\n", line);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "e805a91e5d9931fa4a259f74d54b4bf8f31dafc114edf92f45e7c885fa9d24a0"`
[INFO] running `"docker" "rm" "-f" "e805a91e5d9931fa4a259f74d54b4bf8f31dafc114edf92f45e7c885fa9d24a0"`
[INFO] [stdout] e805a91e5d9931fa4a259f74d54b4bf8f31dafc114edf92f45e7c885fa9d24a0
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/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/Fortunato28/imprecise-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 0d11ff62cab927f99958607a20a47e5686d36cd05331a839987c4133a6a505b5
[INFO] running `"docker" "start" "-a" "0d11ff62cab927f99958607a20a47e5686d36cd05331a839987c4133a6a505b5"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/imprecise_diff-8929b99304e23859
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::test_dir_data_new ... ok
[INFO] [stdout] test tests::levenshtein_distance ... ok
[INFO] [stdout] test tests::contains_very_similar ... ok
[INFO] [stdout] test tests::another_levenshtein_distance ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "0d11ff62cab927f99958607a20a47e5686d36cd05331a839987c4133a6a505b5"`
[INFO] running `"docker" "rm" "-f" "0d11ff62cab927f99958607a20a47e5686d36cd05331a839987c4133a6a505b5"`
[INFO] [stdout] 0d11ff62cab927f99958607a20a47e5686d36cd05331a839987c4133a6a505b5