[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 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] e40a8d79d8b4491318a33b874d1d3523c3701ec97b920335cb7726535899ce71
[INFO] running `"docker" "start" "-a" "e40a8d79d8b4491318a33b874d1d3523c3701ec97b920335cb7726535899ce71"`
[INFO] [stderr]    Compiling snowflake-rs v0.1.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `"docker" "inspect" "e40a8d79d8b4491318a33b874d1d3523c3701ec97b920335cb7726535899ce71"`
[INFO] running `"docker" "rm" "-f" "e40a8d79d8b4491318a33b874d1d3523c3701ec97b920335cb7726535899ce71"`
[INFO] [stdout] e40a8d79d8b4491318a33b874d1d3523c3701ec97b920335cb7726535899ce71
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] b902239a37fe621bcf9adcea21ecbc66f1cbfac85edb2cd8686c67a23768a066
[INFO] running `"docker" "start" "-a" "b902239a37fe621bcf9adcea21ecbc66f1cbfac85edb2cd8686c67a23768a066"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 0.93s
[INFO] running `"docker" "inspect" "b902239a37fe621bcf9adcea21ecbc66f1cbfac85edb2cd8686c67a23768a066"`
[INFO] running `"docker" "rm" "-f" "b902239a37fe621bcf9adcea21ecbc66f1cbfac85edb2cd8686c67a23768a066"`
[INFO] [stdout] b902239a37fe621bcf9adcea21ecbc66f1cbfac85edb2cd8686c67a23768a066
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 79a93f6c850e4be9e6649c92ca01f432b0213513800b702048d050e23b07fbab
[INFO] running `"docker" "start" "-a" "79a93f6c850e4be9e6649c92ca01f432b0213513800b702048d050e23b07fbab"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/snowflake_rs-845564da3e9fa418
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test snowflake::test::loop_test ... ok
[INFO] [stdout] multi thread:[3] generate 1000 ids cost 0.001506195 s
[INFO] [stdout] multi thread:[2] generate 1000 ids cost 0.002271544 s
[INFO] [stdout] multi thread:[4] generate 1000 ids cost 0.002406011 s
[INFO] [stdout] multi thread:[6] generate 1000 ids cost 0.002768494 s
[INFO] [stdout] multi thread:[5] generate 1000 ids cost 0.003577605 s
[INFO] [stdout] multi thread:[9] generate 1000 ids cost 0.003451742 s
[INFO] [stdout] multi thread:[8] generate 1000 ids cost 0.003384375 s
[INFO] [stdout] multi thread:[1] generate 1000 ids cost 0.004977231 s
[INFO] [stdout] multi thread:[7] generate 1000 ids cost 0.004896159 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" "79a93f6c850e4be9e6649c92ca01f432b0213513800b702048d050e23b07fbab"`
[INFO] running `"docker" "rm" "-f" "79a93f6c850e4be9e6649c92ca01f432b0213513800b702048d050e23b07fbab"`
[INFO] [stdout] 79a93f6c850e4be9e6649c92ca01f432b0213513800b702048d050e23b07fbab