[INFO] crate diff_match_patch 0.1.0 is already in cache
[INFO] extracting crate diff_match_patch 0.1.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/diff_match_patch/0.1.0
[INFO] extracting crate diff_match_patch 0.1.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/diff_match_patch/0.1.0
[INFO] validating manifest of diff_match_patch-0.1.0 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 diff_match_patch-0.1.0 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 diff_match_patch-0.1.0
[INFO] finished frobbing diff_match_patch-0.1.0
[INFO] frobbed toml for diff_match_patch-0.1.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/diff_match_patch/0.1.0/Cargo.toml
[INFO] started frobbing diff_match_patch-0.1.0
[INFO] finished frobbing diff_match_patch-0.1.0
[INFO] frobbed toml for diff_match_patch-0.1.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/diff_match_patch/0.1.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 diff_match_patch-0.1.0 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/diff_match_patch/0.1.0:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] cdb0d5e98894f16d56d39704f892ab53ab6e23852f93115e381a6ac59f98d172
[INFO] running `"docker" "start" "-a" "cdb0d5e98894f16d56d39704f892ab53ab6e23852f93115e381a6ac59f98d172"`
[INFO] [stderr]    Compiling diff_match_patch v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/dmp.rs:868:13
[INFO] [stderr]     |
[INFO] [stderr] 868 |         let mut text1_trunc;
[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/dmp.rs:869:13
[INFO] [stderr]     |
[INFO] [stderr] 869 |         let mut text2_trunc;
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/dmp.rs:868:13
[INFO] [stderr]     |
[INFO] [stderr] 868 |         let mut text1_trunc;
[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/dmp.rs:869:13
[INFO] [stderr]     |
[INFO] [stderr] 869 |         let mut text2_trunc;
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.37s
[INFO] running `"docker" "inspect" "cdb0d5e98894f16d56d39704f892ab53ab6e23852f93115e381a6ac59f98d172"`
[INFO] running `"docker" "rm" "-f" "cdb0d5e98894f16d56d39704f892ab53ab6e23852f93115e381a6ac59f98d172"`
[INFO] [stdout] cdb0d5e98894f16d56d39704f892ab53ab6e23852f93115e381a6ac59f98d172
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/diff_match_patch/0.1.0:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] feae26c4f8808ce30022a72925b9b66d62711d1e06a43b553d1b1076094db757
[INFO] running `"docker" "start" "-a" "feae26c4f8808ce30022a72925b9b66d62711d1e06a43b553d1b1076094db757"`
[INFO] [stderr]    Compiling diff_match_patch v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/dmp.rs:868:13
[INFO] [stderr]     |
[INFO] [stderr] 868 |         let mut text1_trunc;
[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/dmp.rs:869:13
[INFO] [stderr]     |
[INFO] [stderr] 869 |         let mut text2_trunc;
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/dmp.rs:868:13
[INFO] [stderr]     |
[INFO] [stderr] 868 |         let mut text1_trunc;
[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/dmp.rs:869:13
[INFO] [stderr]     |
[INFO] [stderr] 869 |         let mut text2_trunc;
[INFO] [stderr]     |             ----^^^^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.79s
[INFO] running `"docker" "inspect" "feae26c4f8808ce30022a72925b9b66d62711d1e06a43b553d1b1076094db757"`
[INFO] running `"docker" "rm" "-f" "feae26c4f8808ce30022a72925b9b66d62711d1e06a43b553d1b1076094db757"`
[INFO] [stdout] feae26c4f8808ce30022a72925b9b66d62711d1e06a43b553d1b1076094db757
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/diff_match_patch/0.1.0:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 98dcc381bb0990885350a1a09fa6c8f4fd200ccf1f7d134d06d7fa8b6aa1cc9c
[INFO] running `"docker" "start" "-a" "98dcc381bb0990885350a1a09fa6c8f4fd200ccf1f7d134d06d7fa8b6aa1cc9c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/diff_match_patch-1f10150b2bc546da
[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] [stderr]      Running /opt/crater/target/debug/deps/main-f637932db5acf3a0
[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] [stderr]    Doc-tests diff_match_patch
[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" "98dcc381bb0990885350a1a09fa6c8f4fd200ccf1f7d134d06d7fa8b6aa1cc9c"`
[INFO] running `"docker" "rm" "-f" "98dcc381bb0990885350a1a09fa6c8f4fd200ccf1f7d134d06d7fa8b6aa1cc9c"`
[INFO] [stdout] 98dcc381bb0990885350a1a09fa6c8f4fd200ccf1f7d134d06d7fa8b6aa1cc9c