[INFO] updating cached repository fujiwara-yu/meibo_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fujiwara-yu/meibo_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fujiwara-yu/meibo_rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/fujiwara-yu/meibo_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/fujiwara-yu/meibo_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fujiwara-yu/meibo_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fujiwara-yu/meibo_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fujiwara-yu/meibo_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c16f93cdbbd8843278e14d794bf7c7ed243dd588
[INFO] sha for GitHub repo fujiwara-yu/meibo_rust: c16f93cdbbd8843278e14d794bf7c7ed243dd588
[INFO] validating manifest of fujiwara-yu/meibo_rust 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 fujiwara-yu/meibo_rust 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 fujiwara-yu/meibo_rust
[INFO] finished frobbing fujiwara-yu/meibo_rust
[INFO] frobbed toml for fujiwara-yu/meibo_rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/fujiwara-yu/meibo_rust/Cargo.toml
[INFO] started frobbing fujiwara-yu/meibo_rust
[INFO] finished frobbing fujiwara-yu/meibo_rust
[INFO] frobbed toml for fujiwara-yu/meibo_rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fujiwara-yu/meibo_rust/Cargo.toml
[INFO] crate fujiwara-yu/meibo_rust 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 fujiwara-yu/meibo_rust 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/fujiwara-yu/meibo_rust:/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] 1bb3912c0ee895fd9dca584bb3025debd820d37874a0bb675b0afc106aef93de
[INFO] running `"docker" "start" "-a" "1bb3912c0ee895fd9dca584bb3025debd820d37874a0bb675b0afc106aef93de"`
[INFO] [stderr]    Compiling meibo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:104:5
[INFO] [stderr]     |
[INFO] [stderr] 104 |     writeln!(f, "{}", write_csv); 
[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]     = 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 1.64s
[INFO] running `"docker" "inspect" "1bb3912c0ee895fd9dca584bb3025debd820d37874a0bb675b0afc106aef93de"`
[INFO] running `"docker" "rm" "-f" "1bb3912c0ee895fd9dca584bb3025debd820d37874a0bb675b0afc106aef93de"`
[INFO] [stdout] 1bb3912c0ee895fd9dca584bb3025debd820d37874a0bb675b0afc106aef93de
[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/fujiwara-yu/meibo_rust:/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] aefd2493b64bd3a1eb2b25863a5921c7a7be7133ac4ed6dfd65ed8ac9b421ee2
[INFO] running `"docker" "start" "-a" "aefd2493b64bd3a1eb2b25863a5921c7a7be7133ac4ed6dfd65ed8ac9b421ee2"`
[INFO] [stderr]    Compiling meibo v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:104:5
[INFO] [stderr]     |
[INFO] [stderr] 104 |     writeln!(f, "{}", write_csv); 
[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]     = 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 0.68s
[INFO] running `"docker" "inspect" "aefd2493b64bd3a1eb2b25863a5921c7a7be7133ac4ed6dfd65ed8ac9b421ee2"`
[INFO] running `"docker" "rm" "-f" "aefd2493b64bd3a1eb2b25863a5921c7a7be7133ac4ed6dfd65ed8ac9b421ee2"`
[INFO] [stdout] aefd2493b64bd3a1eb2b25863a5921c7a7be7133ac4ed6dfd65ed8ac9b421ee2
[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/fujiwara-yu/meibo_rust:/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] 0e52aa1e81918589de4c1b862925b424a6bd63b1d4fdbd0b4fdfa3a6027ccd1f
[INFO] running `"docker" "start" "-a" "0e52aa1e81918589de4c1b862925b424a6bd63b1d4fdbd0b4fdfa3a6027ccd1f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/meibo-5317fcad6a128f7a
[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" "0e52aa1e81918589de4c1b862925b424a6bd63b1d4fdbd0b4fdfa3a6027ccd1f"`
[INFO] running `"docker" "rm" "-f" "0e52aa1e81918589de4c1b862925b424a6bd63b1d4fdbd0b4fdfa3a6027ccd1f"`
[INFO] [stdout] 0e52aa1e81918589de4c1b862925b424a6bd63b1d4fdbd0b4fdfa3a6027ccd1f