[INFO] fetching crate flo_stream 0.4.0...
[INFO] testing flo_stream-0.4.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate flo_stream 0.4.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate flo_stream 0.4.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flo_stream 0.4.0
[INFO] finished tweaking crates.io crate flo_stream 0.4.0
[INFO] tweaked toml for crates.io crate flo_stream 0.4.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate flo_stream 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4afaea38cc0653c4cb0286794332450b2d5390b2cc1265fc6096fdca76f2a10b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "4afaea38cc0653c4cb0286794332450b2d5390b2cc1265fc6096fdca76f2a10b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4afaea38cc0653c4cb0286794332450b2d5390b2cc1265fc6096fdca76f2a10b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4afaea38cc0653c4cb0286794332450b2d5390b2cc1265fc6096fdca76f2a10b", kill_on_drop: false }`
[INFO] [stdout] 4afaea38cc0653c4cb0286794332450b2d5390b2cc1265fc6096fdca76f2a10b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] efca3cba4471ac0602b7866445c81a9ac9a7e0729c8b73edf28a265fe9735baf
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "efca3cba4471ac0602b7866445c81a9ac9a7e0729c8b73edf28a265fe9735baf", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling futures-core v0.3.1
[INFO] [stderr]    Compiling futures-sink v0.3.1
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling futures-task v0.3.1
[INFO] [stderr]    Compiling futures-io v0.3.1
[INFO] [stderr]    Compiling smallvec v1.1.0
[INFO] [stderr]    Compiling futures-channel v0.3.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]    Compiling futures-util v0.3.1
[INFO] [stderr]    Compiling futures-executor v0.3.1
[INFO] [stderr]    Compiling futures v0.3.1
[INFO] [stderr]    Compiling flo_stream v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.03s
[INFO] running `Command { std: "docker" "inspect" "efca3cba4471ac0602b7866445c81a9ac9a7e0729c8b73edf28a265fe9735baf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efca3cba4471ac0602b7866445c81a9ac9a7e0729c8b73edf28a265fe9735baf", kill_on_drop: false }`
[INFO] [stdout] efca3cba4471ac0602b7866445c81a9ac9a7e0729c8b73edf28a265fe9735baf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65b02850c6a6676bce5bfaa759a50e195630dcf196e72ceafaf92d53745ba860
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "65b02850c6a6676bce5bfaa759a50e195630dcf196e72ceafaf92d53745ba860", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling num_cpus v1.11.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling desync v0.5.0
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling flo_stream v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 12.46s
[INFO] running `Command { std: "docker" "inspect" "65b02850c6a6676bce5bfaa759a50e195630dcf196e72ceafaf92d53745ba860", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65b02850c6a6676bce5bfaa759a50e195630dcf196e72ceafaf92d53745ba860", kill_on_drop: false }`
[INFO] [stdout] 65b02850c6a6676bce5bfaa759a50e195630dcf196e72ceafaf92d53745ba860
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] aff828b9ef9647a62dbe7f5000e9a50a1074d94c1d1a22b8c6123b67ee660bbf
[INFO] running `Command { std: "docker" "start" "-a" "aff828b9ef9647a62dbe7f5000e9a50a1074d94c1d1a22b8c6123b67ee660bbf", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/flo_stream-0ca3d7e3c8cbda51
[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/rustwide/target/debug/deps/blocking-ed7dfcb750027404
[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] [stderr]      Running /opt/rustwide/target/debug/deps/pubsub-0d315c5460302f57
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test clone_subscribers ... ok
[INFO] [stdout] test read_on_multiple_subscribers ... ok
[INFO] [stdout] test clone_subscribers_after_reading ... ok
[INFO] [stdout] test send_all_stream ... ok
[INFO] [stdout] test republish_3_times ... ok
[INFO] [stdout] test single_receive_on_one_subscriber ... ok
[INFO] [stdout] test skip_messages_sent_before_subscription ... ok
[INFO] [stdout] test receive_on_one_subscriber ... ok
[INFO] [stdout] test subscriber_closes_when_publisher_closes ... ok
[INFO] [stdout] test single_receive_on_two_subscribers ... ok
[INFO] [stdout] test complete_when_empty ... ok
[INFO] [stdout] test complete_on_multiple_subscribers ... ok
[INFO] [stdout] test blocks_if_subscribers_are_full ... ok
[INFO] [stdout] test expiring_removes_oldest_events_first ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/sink-55b26e0c4907be98
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test close_sink ... ok
[INFO] [stdout] test close_sink_same_thread ... ok
[INFO] [stdout] test send_stream_via_sink ... ok
[INFO] [stdout] test send_via_sink ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 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 `Command { std: "docker" "inspect" "aff828b9ef9647a62dbe7f5000e9a50a1074d94c1d1a22b8c6123b67ee660bbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aff828b9ef9647a62dbe7f5000e9a50a1074d94c1d1a22b8c6123b67ee660bbf", kill_on_drop: false }`
[INFO] [stdout] aff828b9ef9647a62dbe7f5000e9a50a1074d94c1d1a22b8c6123b67ee660bbf