[INFO] fetching crate rusty-x 0.1.75...
[INFO] extracting crate rusty-x 0.1.75 into work/ex/beta-1.37-6/sources/1.36.0/reg/rusty-x/0.1.75
[INFO] extracting crate rusty-x 0.1.75 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rusty-x/0.1.75
[INFO] validating manifest of rusty-x-0.1.75 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 rusty-x-0.1.75 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 rusty-x-0.1.75
[INFO] finished frobbing rusty-x-0.1.75
[INFO] frobbed toml for rusty-x-0.1.75 written to work/ex/beta-1.37-6/sources/1.36.0/reg/rusty-x/0.1.75/Cargo.toml
[INFO] started frobbing rusty-x-0.1.75
[INFO] finished frobbing rusty-x-0.1.75
[INFO] frobbed toml for rusty-x-0.1.75 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rusty-x/0.1.75/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] [stderr]     Blocking waiting for file lock on package cache
[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 rusty-x-0.1.75 against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rusty-x/0.1.75:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 019ce28df7f5a3f8a38f4f844566da245344a4b34063088fb491ce86f173ba13
[INFO] running `"docker" "start" "-a" "019ce28df7f5a3f8a38f4f844566da245344a4b34063088fb491ce86f173ba13"`
[INFO] [stderr]    Compiling winapi v0.3.7
[INFO] [stderr]    Compiling derive_builder v0.7.2
[INFO] [stderr]    Compiling fuzzy-matcher v0.2.1
[INFO] [stderr]    Compiling ansi_colours v1.0.1
[INFO] [stderr]    Compiling onig_sys v69.1.0
[INFO] [stderr]    Compiling libgit2-sys v0.7.11
[INFO] [stderr]    Compiling line-wrap v0.1.1
[INFO] [stderr]    Compiling clicolors-control v0.2.0
[INFO] [stderr]    Compiling content_inspector v0.2.4
[INFO] [stderr]    Compiling darling_core v0.9.0
[INFO] [stderr]    Compiling tuikit v0.2.9
[INFO] [stderr]    Compiling timer v0.2.0
[INFO] [stderr]    Compiling console v0.6.2
[INFO] [stderr]    Compiling plist v0.4.2
[INFO] [stderr]    Compiling toml v0.4.10
[INFO] [stderr]    Compiling winconsole v0.10.0
[INFO] [stderr]    Compiling colored v1.8.0
[INFO] [stderr]    Compiling onig v4.3.2
[INFO] [stderr]    Compiling darling_macro v0.9.0
[INFO] [stderr]    Compiling syntect v3.2.0
[INFO] [stderr]    Compiling darling v0.9.0
[INFO] [stderr]    Compiling derive_builder_core v0.5.0
[INFO] [stderr]    Compiling skim v0.6.8
[INFO] [stderr]    Compiling git2 v0.7.5
[INFO] [stderr]    Compiling prettyprint v0.3.0
[INFO] [stderr]    Compiling rusty-x v0.1.75 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `count`
[INFO] [stderr]   --> src/x.rs:96:16
[INFO] [stderr]    |
[INFO] [stderr] 96 |         .map(|(count, entry, tags)| {
[INFO] [stderr]    |                ^^^^^ help: consider prefixing with an underscore: `_count`
[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/x.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let mut entries: Vec<fs::DirEntry> = fs::read_dir(&snippet_location.local)?
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1m 31s
[INFO] running `"docker" "inspect" "019ce28df7f5a3f8a38f4f844566da245344a4b34063088fb491ce86f173ba13"`
[INFO] running `"docker" "rm" "-f" "019ce28df7f5a3f8a38f4f844566da245344a4b34063088fb491ce86f173ba13"`
[INFO] [stdout] 019ce28df7f5a3f8a38f4f844566da245344a4b34063088fb491ce86f173ba13
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rusty-x/0.1.75:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1813770858fe13ad361e85e24507bcfa2b113b4ef26cd9f5abacc59f80e72079
[INFO] running `"docker" "start" "-a" "1813770858fe13ad361e85e24507bcfa2b113b4ef26cd9f5abacc59f80e72079"`
[INFO] [stderr]    Compiling rusty-x v0.1.75 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `count`
[INFO] [stderr]   --> src/x.rs:96:16
[INFO] [stderr]    |
[INFO] [stderr] 96 |         .map(|(count, entry, tags)| {
[INFO] [stderr]    |                ^^^^^ help: consider prefixing with an underscore: `_count`
[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/x.rs:38:13
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let mut entries: Vec<fs::DirEntry> = fs::read_dir(&snippet_location.local)?
[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]     Finished dev [unoptimized + debuginfo] target(s) in 2.23s
[INFO] running `"docker" "inspect" "1813770858fe13ad361e85e24507bcfa2b113b4ef26cd9f5abacc59f80e72079"`
[INFO] running `"docker" "rm" "-f" "1813770858fe13ad361e85e24507bcfa2b113b4ef26cd9f5abacc59f80e72079"`
[INFO] [stdout] 1813770858fe13ad361e85e24507bcfa2b113b4ef26cd9f5abacc59f80e72079
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/rusty-x/0.1.75:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] ecaf8ea71670daf8866672aba7e5ddc1a420cb712027a09e28d6cc1c645b485a
[INFO] running `"docker" "start" "-a" "ecaf8ea71670daf8866672aba7e5ddc1a420cb712027a09e28d6cc1c645b485a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rusty_x-4d23d27a717feebd
[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] [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/x-a5c554e4a5f3baf6
[INFO] [stderr]    Doc-tests rusty-x
[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" "ecaf8ea71670daf8866672aba7e5ddc1a420cb712027a09e28d6cc1c645b485a"`
[INFO] running `"docker" "rm" "-f" "ecaf8ea71670daf8866672aba7e5ddc1a420cb712027a09e28d6cc1c645b485a"`
[INFO] [stdout] ecaf8ea71670daf8866672aba7e5ddc1a420cb712027a09e28d6cc1c645b485a