[INFO] updating cached repository indutny/append-multi-log
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/indutny/append-multi-log
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/indutny/append-multi-log" "work/ex/beta-1.38-1/sources/1.37.0/gh/indutny/append-multi-log"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/indutny/append-multi-log'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/indutny/append-multi-log" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/indutny/append-multi-log"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/indutny/append-multi-log'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2169eb250dcd3477a1aabc9b72331e0597306b43
[INFO] sha for GitHub repo indutny/append-multi-log: 2169eb250dcd3477a1aabc9b72331e0597306b43
[INFO] validating manifest of indutny/append-multi-log 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 indutny/append-multi-log 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 indutny/append-multi-log
[INFO] finished frobbing indutny/append-multi-log
[INFO] frobbed toml for indutny/append-multi-log written to work/ex/beta-1.38-1/sources/1.37.0/gh/indutny/append-multi-log/Cargo.toml
[INFO] started frobbing indutny/append-multi-log
[INFO] finished frobbing indutny/append-multi-log
[INFO] frobbed toml for indutny/append-multi-log written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/indutny/append-multi-log/Cargo.toml
[INFO] crate indutny/append-multi-log 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 indutny/append-multi-log 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-7/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/indutny/append-multi-log:/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] d6e41f7c1e242808ef8ebb794c381ade9dc9d91639656e9b79fb736f65cc4927
[INFO] running `"docker" "start" "-a" "d6e41f7c1e242808ef8ebb794c381ade9dc9d91639656e9b79fb736f65cc4927"`
[INFO] [stderr]    Compiling append-log v0.1.4-dev
[INFO] [stderr]    Compiling append-multi-log v0.1.0-dev (/opt/crater/workdir)
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/error.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |             _ => write!(f, "{}", self.description()),
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `path`
[INFO] [stderr]   --> src/log.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     path: PathBuf,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `options`
[INFO] [stderr]   --> src/log.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     options: Options,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `logs`
[INFO] [stderr]   --> src/log.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     logs: Vec<Log>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `log_count`
[INFO] [stderr]   --> src/log.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     log_count: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `log_path`
[INFO] [stderr]   --> src/log.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn log_path(path: &Path, index: usize) -> PathBuf {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `"docker" "inspect" "d6e41f7c1e242808ef8ebb794c381ade9dc9d91639656e9b79fb736f65cc4927"`
[INFO] running `"docker" "rm" "-f" "d6e41f7c1e242808ef8ebb794c381ade9dc9d91639656e9b79fb736f65cc4927"`
[INFO] [stdout] d6e41f7c1e242808ef8ebb794c381ade9dc9d91639656e9b79fb736f65cc4927
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/indutny/append-multi-log:/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] cbd1346fd8473a0ef1b55f9eb7d3e190d2de08f468859feb371a6ee120cbe88a
[INFO] running `"docker" "start" "-a" "cbd1346fd8473a0ef1b55f9eb7d3e190d2de08f468859feb371a6ee120cbe88a"`
[INFO] [stderr]    Compiling tempfile v3.0.7
[INFO] [stderr]    Compiling append-multi-log v0.1.0-dev (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `tempfile::tempdir`
[INFO] [stderr]   --> src/log.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     use tempfile::tempdir;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable pattern
[INFO] [stderr]   --> src/error.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |             _ => write!(f, "{}", self.description()),
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `path`
[INFO] [stderr]   --> src/log.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     path: PathBuf,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `options`
[INFO] [stderr]   --> src/log.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     options: Options,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `logs`
[INFO] [stderr]   --> src/log.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     logs: Vec<Log>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `log_count`
[INFO] [stderr]   --> src/log.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     log_count: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.58s
[INFO] running `"docker" "inspect" "cbd1346fd8473a0ef1b55f9eb7d3e190d2de08f468859feb371a6ee120cbe88a"`
[INFO] running `"docker" "rm" "-f" "cbd1346fd8473a0ef1b55f9eb7d3e190d2de08f468859feb371a6ee120cbe88a"`
[INFO] [stdout] cbd1346fd8473a0ef1b55f9eb7d3e190d2de08f468859feb371a6ee120cbe88a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/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/indutny/append-multi-log:/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] db42fe76d5f1a6298e8917bf297d58387678559a985738779110039d66f5be6c
[INFO] running `"docker" "start" "-a" "db42fe76d5f1a6298e8917bf297d58387678559a985738779110039d66f5be6c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/append_multi_log-98d241d68064837a
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test log::tests::it_should_construct_proper_log_path ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests append-multi-log
[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" "db42fe76d5f1a6298e8917bf297d58387678559a985738779110039d66f5be6c"`
[INFO] running `"docker" "rm" "-f" "db42fe76d5f1a6298e8917bf297d58387678559a985738779110039d66f5be6c"`
[INFO] [stdout] db42fe76d5f1a6298e8917bf297d58387678559a985738779110039d66f5be6c