[INFO] crate file_diff 1.0.0 is already in cache
[INFO] extracting crate file_diff 1.0.0 into work/ex/beta-1.37-6/sources/1.36.0/reg/file_diff/1.0.0
[INFO] extracting crate file_diff 1.0.0 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/file_diff/1.0.0
[INFO] validating manifest of file_diff-1.0.0 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 file_diff-1.0.0 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 file_diff-1.0.0
[INFO] finished frobbing file_diff-1.0.0
[INFO] frobbed toml for file_diff-1.0.0 written to work/ex/beta-1.37-6/sources/1.36.0/reg/file_diff/1.0.0/Cargo.toml
[INFO] started frobbing file_diff-1.0.0
[INFO] finished frobbing file_diff-1.0.0
[INFO] frobbed toml for file_diff-1.0.0 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/file_diff/1.0.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 file_diff-1.0.0 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-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/file_diff/1.0.0:/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] 1116f736ea21b85b80790b5ba7108e6571a8327f5983672ed54197b83fde9c4e
[INFO] running `"docker" "start" "-a" "1116f736ea21b85b80790b5ba7108e6571a8327f5983672ed54197b83fde9c4e"`
[INFO] [stderr]    Compiling file_diff v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let mut buff1 : &mut [u8] = &mut [0; 1024];
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let mut buff2 : &mut [u8] = &mut [0; 1024];
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `"docker" "inspect" "1116f736ea21b85b80790b5ba7108e6571a8327f5983672ed54197b83fde9c4e"`
[INFO] running `"docker" "rm" "-f" "1116f736ea21b85b80790b5ba7108e6571a8327f5983672ed54197b83fde9c4e"`
[INFO] [stdout] 1116f736ea21b85b80790b5ba7108e6571a8327f5983672ed54197b83fde9c4e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/file_diff/1.0.0:/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] 2b4b50af68889df439b94bf4de04c2a70753b13345f7e93303191fed7d1983c3
[INFO] running `"docker" "start" "-a" "2b4b50af68889df439b94bf4de04c2a70753b13345f7e93303191fed7d1983c3"`
[INFO] [stderr]    Compiling file_diff v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let mut buff1 : &mut [u8] = &mut [0; 1024];
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let mut buff2 : &mut [u8] = &mut [0; 1024];
[INFO] [stderr]    |         ----^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "2b4b50af68889df439b94bf4de04c2a70753b13345f7e93303191fed7d1983c3"`
[INFO] running `"docker" "rm" "-f" "2b4b50af68889df439b94bf4de04c2a70753b13345f7e93303191fed7d1983c3"`
[INFO] [stdout] 2b4b50af68889df439b94bf4de04c2a70753b13345f7e93303191fed7d1983c3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/file_diff/1.0.0:/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] 236a27537d0b45018da1490b2bd1a3d725851b7a025bd05db2b2333bb763221f
[INFO] running `"docker" "start" "-a" "236a27537d0b45018da1490b2bd1a3d725851b7a025bd05db2b2333bb763221f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/file_diff-aaa2c0a28e9c2ba7
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::diff_different_binary_files ... ok
[INFO] [stdout] test tests::diff_identical_binary_files ... ok
[INFO] [stdout] test tests::diff_different_text_files ... ok
[INFO] [stdout] test tests::diff_the_same_binary_file ... ok
[INFO] [stdout] test tests::diff_the_same_text_file ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests file_diff
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs -  (line 33) ... ok
[INFO] [stdout] test src/lib.rs -  (line 14) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "236a27537d0b45018da1490b2bd1a3d725851b7a025bd05db2b2333bb763221f"`
[INFO] running `"docker" "rm" "-f" "236a27537d0b45018da1490b2bd1a3d725851b7a025bd05db2b2333bb763221f"`
[INFO] [stdout] 236a27537d0b45018da1490b2bd1a3d725851b7a025bd05db2b2333bb763221f