[INFO] crate stream_throttle 0.2.1 is already in cache
[INFO] extracting crate stream_throttle 0.2.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/stream_throttle/0.2.1
[INFO] extracting crate stream_throttle 0.2.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/stream_throttle/0.2.1
[INFO] validating manifest of stream_throttle-0.2.1 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of stream_throttle-0.2.1 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing stream_throttle-0.2.1
[INFO] finished frobbing stream_throttle-0.2.1
[INFO] frobbed toml for stream_throttle-0.2.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/stream_throttle/0.2.1/Cargo.toml
[INFO] started frobbing stream_throttle-0.2.1
[INFO] finished frobbing stream_throttle-0.2.1
[INFO] frobbed toml for stream_throttle-0.2.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/stream_throttle/0.2.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "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" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing stream_throttle-0.2.1 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/stream_throttle/0.2.1:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 0a9ebb3745b843e47384e9b7fc581d35dc3e56740ac62812d5acc44923472089
[INFO] running `"docker" "start" "-a" "0a9ebb3745b843e47384e9b7fc581d35dc3e56740ac62812d5acc44923472089"`
[INFO] [stderr]    Compiling stream_throttle v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/lib.rs:60:1
[INFO] [stderr]    |
[INFO] [stderr] 60 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/pool.rs:51:10
[INFO] [stderr]    |
[INFO] [stderr] 51 |                     for mut slot in &inner.slots {
[INFO] [stderr]    |                         ----^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `"docker" "inspect" "0a9ebb3745b843e47384e9b7fc581d35dc3e56740ac62812d5acc44923472089"`
[INFO] running `"docker" "rm" "-f" "0a9ebb3745b843e47384e9b7fc581d35dc3e56740ac62812d5acc44923472089"`
[INFO] [stdout] 0a9ebb3745b843e47384e9b7fc581d35dc3e56740ac62812d5acc44923472089
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/stream_throttle/0.2.1:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 846f886ebeab1500ea4b0d1336c753dc4ba8f31eea9a3f8db0c40779f006aa61
[INFO] running `"docker" "start" "-a" "846f886ebeab1500ea4b0d1336c753dc4ba8f31eea9a3f8db0c40779f006aa61"`
[INFO] [stderr]    Compiling stream_throttle v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/lib.rs:60:1
[INFO] [stderr]    |
[INFO] [stderr] 60 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/pool.rs:51:10
[INFO] [stderr]    |
[INFO] [stderr] 51 |                     for mut slot in &inner.slots {
[INFO] [stderr]    |                         ----^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.70s
[INFO] running `"docker" "inspect" "846f886ebeab1500ea4b0d1336c753dc4ba8f31eea9a3f8db0c40779f006aa61"`
[INFO] running `"docker" "rm" "-f" "846f886ebeab1500ea4b0d1336c753dc4ba8f31eea9a3f8db0c40779f006aa61"`
[INFO] [stdout] 846f886ebeab1500ea4b0d1336c753dc4ba8f31eea9a3f8db0c40779f006aa61
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/stream_throttle/0.2.1:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 04ef8bc902583bbf2d65643ebab4ca363883b8483c7b8e7dd4f6efb75fe152bd
[INFO] running `"docker" "start" "-a" "04ef8bc902583bbf2d65643ebab4ca363883b8483c7b8e7dd4f6efb75fe152bd"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/stream_throttle-99180d1795f071fb
[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] [stderr]    Doc-tests stream_throttle
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs -  (line 35) ... ok
[INFO] [stdout] test src/lib.rs -  (line 13) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "04ef8bc902583bbf2d65643ebab4ca363883b8483c7b8e7dd4f6efb75fe152bd"`
[INFO] running `"docker" "rm" "-f" "04ef8bc902583bbf2d65643ebab4ca363883b8483c7b8e7dd4f6efb75fe152bd"`
[INFO] [stdout] 04ef8bc902583bbf2d65643ebab4ca363883b8483c7b8e7dd4f6efb75fe152bd