[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 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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] f98b911031740368c7a2b6ef264dabf9dd5623ef510bfee02b04bf4533aca664
[INFO] running `"docker" "start" "-a" "f98b911031740368c7a2b6ef264dabf9dd5623ef510bfee02b04bf4533aca664"`
[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 1.65s
[INFO] running `"docker" "inspect" "f98b911031740368c7a2b6ef264dabf9dd5623ef510bfee02b04bf4533aca664"`
[INFO] running `"docker" "rm" "-f" "f98b911031740368c7a2b6ef264dabf9dd5623ef510bfee02b04bf4533aca664"`
[INFO] [stdout] f98b911031740368c7a2b6ef264dabf9dd5623ef510bfee02b04bf4533aca664
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] e88434cea4157ca70df4d01e97e4901a5fdbb09a3b25f2315f83653c82608897
[INFO] running `"docker" "start" "-a" "e88434cea4157ca70df4d01e97e4901a5fdbb09a3b25f2315f83653c82608897"`
[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 0.75s
[INFO] running `"docker" "inspect" "e88434cea4157ca70df4d01e97e4901a5fdbb09a3b25f2315f83653c82608897"`
[INFO] running `"docker" "rm" "-f" "e88434cea4157ca70df4d01e97e4901a5fdbb09a3b25f2315f83653c82608897"`
[INFO] [stdout] e88434cea4157ca70df4d01e97e4901a5fdbb09a3b25f2315f83653c82608897
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 99685e918b2f1b2349904e9dff53a2462dcdad492110164ca1e5e9cb8a4afac2
[INFO] running `"docker" "start" "-a" "99685e918b2f1b2349904e9dff53a2462dcdad492110164ca1e5e9cb8a4afac2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/meibo-c0445976ed2b0bc3
[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" "99685e918b2f1b2349904e9dff53a2462dcdad492110164ca1e5e9cb8a4afac2"`
[INFO] running `"docker" "rm" "-f" "99685e918b2f1b2349904e9dff53a2462dcdad492110164ca1e5e9cb8a4afac2"`
[INFO] [stdout] 99685e918b2f1b2349904e9dff53a2462dcdad492110164ca1e5e9cb8a4afac2