[INFO] crate snowflake-rs 0.1.1 is already in cache
[INFO] extracting crate snowflake-rs 0.1.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/snowflake-rs/0.1.1
[INFO] extracting crate snowflake-rs 0.1.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/snowflake-rs/0.1.1
[INFO] validating manifest of snowflake-rs-0.1.1 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 snowflake-rs-0.1.1 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 snowflake-rs-0.1.1
[INFO] finished frobbing snowflake-rs-0.1.1
[INFO] frobbed toml for snowflake-rs-0.1.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/snowflake-rs/0.1.1/Cargo.toml
[INFO] started frobbing snowflake-rs-0.1.1
[INFO] finished frobbing snowflake-rs-0.1.1
[INFO] frobbed toml for snowflake-rs-0.1.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/snowflake-rs/0.1.1/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] [stderr]     Blocking waiting for file lock on package cache
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing snowflake-rs-0.1.1 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-4/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/snowflake-rs/0.1.1:/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] 5e54bc70eb4fc3b40abc0fa513d52643f5110e988769b1336c6db836355e7a1f
[INFO] running `"docker" "start" "-a" "5e54bc70eb4fc3b40abc0fa513d52643f5110e988769b1336c6db836355e7a1f"`
[INFO] [stderr]    Compiling snowflake-rs v0.1.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `"docker" "inspect" "5e54bc70eb4fc3b40abc0fa513d52643f5110e988769b1336c6db836355e7a1f"`
[INFO] running `"docker" "rm" "-f" "5e54bc70eb4fc3b40abc0fa513d52643f5110e988769b1336c6db836355e7a1f"`
[INFO] [stdout] 5e54bc70eb4fc3b40abc0fa513d52643f5110e988769b1336c6db836355e7a1f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/snowflake-rs/0.1.1:/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] 573d7a720f718b22991c36c5426e3092ab10d38b23ed1945b2c29a4d06b48a94
[INFO] running `"docker" "start" "-a" "573d7a720f718b22991c36c5426e3092ab10d38b23ed1945b2c29a4d06b48a94"`
[INFO] [stderr]    Compiling snowflake-rs v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/snowflake.rs:136:13
[INFO] [stderr]     |
[INFO] [stderr] 136 |             t.join();
[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 1.12s
[INFO] running `"docker" "inspect" "573d7a720f718b22991c36c5426e3092ab10d38b23ed1945b2c29a4d06b48a94"`
[INFO] running `"docker" "rm" "-f" "573d7a720f718b22991c36c5426e3092ab10d38b23ed1945b2c29a4d06b48a94"`
[INFO] [stdout] 573d7a720f718b22991c36c5426e3092ab10d38b23ed1945b2c29a4d06b48a94
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/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/snowflake-rs/0.1.1:/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] b1ad0532b354fc40d669e43c2ab8b720c82f33ef3138aeccb590135343dae0aa
[INFO] running `"docker" "start" "-a" "b1ad0532b354fc40d669e43c2ab8b720c82f33ef3138aeccb590135343dae0aa"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/snowflake_rs-2bba27b2c2c3d94d
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test snowflake::test::loop_test ... ok
[INFO] [stdout] multi thread:[9] generate 1000 ids cost 0.000889460 s
[INFO] [stdout] multi thread:[1] generate 1000 ids cost 0.000883557 s
[INFO] [stdout] multi thread:[7] generate 1000 ids cost 0.001777317 s
[INFO] [stdout] multi thread:[4] generate 1000 ids cost 0.000863194 s
[INFO] [stdout] multi thread:[8] generate 1000 ids cost 0.002041940 s
[INFO] [stdout] multi thread:[5] generate 1000 ids cost 0.000255199 s
[INFO] [stdout] multi thread:[2] generate 1000 ids cost 0.000263839 s
[INFO] [stdout] multi thread:[3] generate 1000 ids cost 0.000262639 s
[INFO] [stdout] multi thread:[6] generate 1000 ids cost 0.000269709 s
[INFO] [stdout] test snowflake::test::multi_thread ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests snowflake-rs
[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" "b1ad0532b354fc40d669e43c2ab8b720c82f33ef3138aeccb590135343dae0aa"`
[INFO] running `"docker" "rm" "-f" "b1ad0532b354fc40d669e43c2ab8b720c82f33ef3138aeccb590135343dae0aa"`
[INFO] [stdout] b1ad0532b354fc40d669e43c2ab8b720c82f33ef3138aeccb590135343dae0aa