[INFO] crate flo_stream 0.3.0 is already in cache
[INFO] extracting crate flo_stream 0.3.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/flo_stream/0.3.0
[INFO] extracting crate flo_stream 0.3.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/flo_stream/0.3.0
[INFO] validating manifest of flo_stream-0.3.0 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 flo_stream-0.3.0 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 flo_stream-0.3.0
[INFO] finished frobbing flo_stream-0.3.0
[INFO] frobbed toml for flo_stream-0.3.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/flo_stream/0.3.0/Cargo.toml
[INFO] started frobbing flo_stream-0.3.0
[INFO] finished frobbing flo_stream-0.3.0
[INFO] frobbed toml for flo_stream-0.3.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/flo_stream/0.3.0/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 flo_stream-0.3.0 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/flo_stream/0.3.0:/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] c9f50aaa816aa84f98aa471c862e4b00a67abefc9e350cf3eab393d027bb98ab
[INFO] running `"docker" "start" "-a" "c9f50aaa816aa84f98aa471c862e4b00a67abefc9e350cf3eab393d027bb98ab"`
[INFO] [stderr]    Compiling flo_stream v0.3.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `"docker" "inspect" "c9f50aaa816aa84f98aa471c862e4b00a67abefc9e350cf3eab393d027bb98ab"`
[INFO] running `"docker" "rm" "-f" "c9f50aaa816aa84f98aa471c862e4b00a67abefc9e350cf3eab393d027bb98ab"`
[INFO] [stdout] c9f50aaa816aa84f98aa471c862e4b00a67abefc9e350cf3eab393d027bb98ab
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/flo_stream/0.3.0:/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] 37049ff25d473de01510741efaa71636d516ab65458fea0f8037d6bd704d4ea7
[INFO] running `"docker" "start" "-a" "37049ff25d473de01510741efaa71636d516ab65458fea0f8037d6bd704d4ea7"`
[INFO] [stderr]    Compiling desync v0.3.0
[INFO] [stderr]    Compiling flo_stream v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `futures::stream::Chunks` in tuple element 1 that must be used
[INFO] [stderr]   --> examples/parallel_counter.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     executor::spawn(work_done).wait_future().unwrap();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]    = note: streams do nothing unless polled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.11s
[INFO] running `"docker" "inspect" "37049ff25d473de01510741efaa71636d516ab65458fea0f8037d6bd704d4ea7"`
[INFO] running `"docker" "rm" "-f" "37049ff25d473de01510741efaa71636d516ab65458fea0f8037d6bd704d4ea7"`
[INFO] [stdout] 37049ff25d473de01510741efaa71636d516ab65458fea0f8037d6bd704d4ea7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/flo_stream/0.3.0:/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] eae9f0cda256525e2cd4d60de57a4f3bc1d97738be704c640e67109f03719a4e
[INFO] running `"docker" "start" "-a" "eae9f0cda256525e2cd4d60de57a4f3bc1d97738be704c640e67109f03719a4e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/flo_stream-3bd2e5b8fbe7e7c3
[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]      Running /opt/crater/target/debug/deps/blocking-1b5b6a36852abc94
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test unblocks_if_there_are_sufficient_subscribers ... ok
[INFO] [stdout] test read_from_subscribers ... ok
[INFO] [stdout] test blocks_if_there_are_no_subscribers ... ok
[INFO] [stdout] test blocks_if_there_are_insufficient_subscribers ... ok
[INFO] [stdout] test read_from_thread_late_start ... ok
[INFO] [stdout] test read_from_thread ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/pubsub-3f42206cdaa6f0fe
[INFO] [stdout] running 12 tests
[INFO] [stdout] test clone_subscribers_after_reading ... ok
[INFO] [stdout] test clone_subscribers ... ok
[INFO] [stdout] test blocks_if_subscribers_are_full ... ok
[INFO] [stdout] test complete_on_multiple_subscribers ... ok
[INFO] [stdout] test expiring_removes_oldest_events_first ... ok
[INFO] [stdout] test single_receive_on_one_subscriber ... ok
[INFO] [stdout] test receive_on_one_subscriber ... ok
[INFO] [stdout] test complete_when_empty ... ok
[INFO] [stdout] test read_on_multiple_subscribers ... ok
[INFO] [stdout] test subscriber_closes_when_publisher_closes ... ok
[INFO] [stdout] test skip_messages_sent_before_subscription ... ok
[INFO] [stdout] test single_receive_on_two_subscribers ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 12 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests flo_stream
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 20) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "eae9f0cda256525e2cd4d60de57a4f3bc1d97738be704c640e67109f03719a4e"`
[INFO] running `"docker" "rm" "-f" "eae9f0cda256525e2cd4d60de57a4f3bc1d97738be704c640e67109f03719a4e"`
[INFO] [stdout] eae9f0cda256525e2cd4d60de57a4f3bc1d97738be704c640e67109f03719a4e