[INFO] crate happiness_cli 0.1.31 is already in cache
[INFO] extracting crate happiness_cli 0.1.31 into work/ex/beta-1.38-1/sources/1.37.0/reg/happiness_cli/0.1.31
[INFO] extracting crate happiness_cli 0.1.31 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/happiness_cli/0.1.31
[INFO] validating manifest of happiness_cli-0.1.31 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 happiness_cli-0.1.31 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 happiness_cli-0.1.31
[INFO] finished frobbing happiness_cli-0.1.31
[INFO] frobbed toml for happiness_cli-0.1.31 written to work/ex/beta-1.38-1/sources/1.37.0/reg/happiness_cli/0.1.31/Cargo.toml
[INFO] started frobbing happiness_cli-0.1.31
[INFO] finished frobbing happiness_cli-0.1.31
[INFO] frobbed toml for happiness_cli-0.1.31 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/happiness_cli/0.1.31/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 happiness_cli-0.1.31 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/reg/happiness_cli/0.1.31:/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] 89d316fcbc31daf9add75d6fee6ac8f9a5a5aa93891931c7140987e3680fb2bf
[INFO] running `"docker" "start" "-a" "89d316fcbc31daf9add75d6fee6ac8f9a5a5aa93891931c7140987e3680fb2bf"`
[INFO] [stderr]    Compiling happiness_cli v0.1.31 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:291:2
[INFO] [stderr]     |
[INFO] [stderr] 291 |     fs::create_dir("./data_happiness");
[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] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.19s
[INFO] running `"docker" "inspect" "89d316fcbc31daf9add75d6fee6ac8f9a5a5aa93891931c7140987e3680fb2bf"`
[INFO] running `"docker" "rm" "-f" "89d316fcbc31daf9add75d6fee6ac8f9a5a5aa93891931c7140987e3680fb2bf"`
[INFO] [stdout] 89d316fcbc31daf9add75d6fee6ac8f9a5a5aa93891931c7140987e3680fb2bf
[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/reg/happiness_cli/0.1.31:/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] 768038c19b9acb28dd779ef69665a9dcd401496605495ed0f44f17c30a76dd37
[INFO] running `"docker" "start" "-a" "768038c19b9acb28dd779ef69665a9dcd401496605495ed0f44f17c30a76dd37"`
[INFO] [stderr]    Compiling happiness_cli v0.1.31 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:291:2
[INFO] [stderr]     |
[INFO] [stderr] 291 |     fs::create_dir("./data_happiness");
[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] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `"docker" "inspect" "768038c19b9acb28dd779ef69665a9dcd401496605495ed0f44f17c30a76dd37"`
[INFO] running `"docker" "rm" "-f" "768038c19b9acb28dd779ef69665a9dcd401496605495ed0f44f17c30a76dd37"`
[INFO] [stdout] 768038c19b9acb28dd779ef69665a9dcd401496605495ed0f44f17c30a76dd37
[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/reg/happiness_cli/0.1.31:/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] 54892893bb9f3bac9c23c35bc793d9a66f3a6d7ebcca75ec5459b0b58170dcac
[INFO] running `"docker" "start" "-a" "54892893bb9f3bac9c23c35bc793d9a66f3a6d7ebcca75ec5459b0b58170dcac"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/happiness_cli-faccbb066262baea
[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" "54892893bb9f3bac9c23c35bc793d9a66f3a6d7ebcca75ec5459b0b58170dcac"`
[INFO] running `"docker" "rm" "-f" "54892893bb9f3bac9c23c35bc793d9a66f3a6d7ebcca75ec5459b0b58170dcac"`
[INFO] [stdout] 54892893bb9f3bac9c23c35bc793d9a66f3a6d7ebcca75ec5459b0b58170dcac