[INFO] fetching crate flo_binding 2.0.0...
[INFO] testing flo_binding-2.0.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate flo_binding 2.0.0 into /workspace/builds/worker-51/source
[INFO] validating manifest of crates.io crate flo_binding 2.0.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flo_binding 2.0.0
[INFO] finished tweaking crates.io crate flo_binding 2.0.0
[INFO] tweaked toml for crates.io crate flo_binding 2.0.0 written to /workspace/builds/worker-51/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 03a79c3ad0b7f544393ce8a2b33603c03e423e1bba99da293fcbdbee6706c643
[INFO] running `Command { std: "docker" "start" "-a" "03a79c3ad0b7f544393ce8a2b33603c03e423e1bba99da293fcbdbee6706c643", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03a79c3ad0b7f544393ce8a2b33603c03e423e1bba99da293fcbdbee6706c643", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03a79c3ad0b7f544393ce8a2b33603c03e423e1bba99da293fcbdbee6706c643", kill_on_drop: false }`
[INFO] [stdout] 03a79c3ad0b7f544393ce8a2b33603c03e423e1bba99da293fcbdbee6706c643
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05234a233f3eafca0c55d8dd86af4e5caef1c1e27266f454e46278ef88445a36
[INFO] running `Command { std: "docker" "start" "-a" "05234a233f3eafca0c55d8dd86af4e5caef1c1e27266f454e46278ef88445a36", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]    Compiling futures-task v0.3.17
[INFO] [stderr]    Compiling futures-sink v0.3.17
[INFO] [stderr]    Compiling futures-io v0.3.17
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling flo_rope v0.1.0
[INFO] [stderr]    Compiling futures-macro v0.3.17
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling futures-executor v0.3.17
[INFO] [stderr]    Compiling futures v0.3.17
[INFO] [stderr]    Compiling flo_stream v0.4.0
[INFO] [stderr]    Compiling desync v0.7.0
[INFO] [stderr]    Compiling flo_binding v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.87s
[INFO] running `Command { std: "docker" "inspect" "05234a233f3eafca0c55d8dd86af4e5caef1c1e27266f454e46278ef88445a36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05234a233f3eafca0c55d8dd86af4e5caef1c1e27266f454e46278ef88445a36", kill_on_drop: false }`
[INFO] [stdout] 05234a233f3eafca0c55d8dd86af4e5caef1c1e27266f454e46278ef88445a36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ee7505903978a51c67741117e26a200d565333cde0af6c3a929408072863379
[INFO] running `Command { std: "docker" "start" "-a" "8ee7505903978a51c67741117e26a200d565333cde0af6c3a929408072863379", kill_on_drop: false }`
[INFO] [stderr]    Compiling flo_binding v2.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.74s
[INFO] running `Command { std: "docker" "inspect" "8ee7505903978a51c67741117e26a200d565333cde0af6c3a929408072863379", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ee7505903978a51c67741117e26a200d565333cde0af6c3a929408072863379", kill_on_drop: false }`
[INFO] [stdout] 8ee7505903978a51c67741117e26a200d565333cde0af6c3a929408072863379
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-51/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4ac801f4c3b697e12c27d6a0108c332ee61db9099852e5ed1d1f603beca41772
[INFO] running `Command { std: "docker" "start" "-a" "4ac801f4c3b697e12c27d6a0108c332ee61db9099852e5ed1d1f603beca41772", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/flo_binding-afa2a2ed268ecbfa)
[INFO] [stdout] 
[INFO] [stdout] running 40 tests
[INFO] [stdout] test bindref::test::bind_ref_from_computed ... ok
[INFO] [stdout] test bindref::test::bind_ref_from_value ... ok
[INFO] [stdout] test bindref::test::bindref_matches_core_value ... ok
[INFO] [stdout] test bindref::test::bindref_matches_core_value_when_created_from_ref ... ok
[INFO] [stdout] test test::binding_context_is_notified ... ok
[INFO] [stdout] test test::can_create_binding ... ok
[INFO] [stdout] test test::can_compute_value ... ok
[INFO] [stdout] test test::can_recompute_value ... ok
[INFO] [stdout] test follow::test::stream_is_unready_after_first_read ... ok
[INFO] [stdout] test test::can_recursively_compute_values ... ok
[INFO] [stdout] test follow::test::follow_stream_updates ... ok
[INFO] [stdout] test follow::test::stream_is_immediately_ready_after_write ... ok
[INFO] [stdout] test test::can_recursively_compute_values_2 ... ok
[INFO] [stdout] test follow::test::follow_stream_has_initial_value ... ok
[INFO] [stdout] test test::can_update_binding ... ok
[INFO] [stdout] test test::can_recursively_compute_values_3 ... ok
[INFO] [stdout] test test::computed_caches_values ... ok
[INFO] [stdout] test test::computed_doesnt_notify_more_than_once ... ok
[INFO] [stdout] test rope_binding::tests::mutable_rope_sends_changes_to_stream ... ok
[INFO] [stdout] test test::computed_notifies_of_changes ... ok
[INFO] [stdout] test test::computed_propagates_changes ... ok
[INFO] [stdout] test test::computed_only_recomputes_as_needed ... ok
[INFO] [stdout] test test::computed_stops_notifying_once_out_of_scope ... ok
[INFO] [stdout] test rope_binding::tests::pull_from_mutable_binding ... ok
[INFO] [stdout] test test::computed_switches_dependencies ... ok
[INFO] [stdout] test test::computed_stops_notifying_when_released ... ok
[INFO] [stdout] test test::dispatches_multiple_notifications ... ok
[INFO] [stdout] test test::not_notified_on_no_change ... ok
[INFO] [stdout] test test::notified_on_change ... ok
[INFO] [stdout] test test::notifies_after_each_change ... ok
[INFO] [stdout] test test::stops_notifying_after_release ... ok
[INFO] [stdout] test test::release_only_affects_one_notification ... ok
[INFO] [stdout] test bind_stream::test::no_notification_on_no_change ... ok
[INFO] [stdout] test bind_stream::test::stream_processes_updates ... ok
[INFO] [stdout] test bind_stream::test::stream_in_all_values ... ok
[INFO] [stdout] test bind_stream::test::notifies_on_change ... ok
[INFO] [stdout] test test::panics_if_computed_generated_during_binding - should panic ... ok
[INFO] [stdout] test follow::test::will_wake_when_binding_is_updated ... ok
[INFO] [stdout] test test::change_during_computation_recomputes ... ok
[INFO] [stderr]    Doc-tests flo_binding
[INFO] [stdout] test follow::test::computed_updates_during_read ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 40 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.61s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 80) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.79s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4ac801f4c3b697e12c27d6a0108c332ee61db9099852e5ed1d1f603beca41772", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ac801f4c3b697e12c27d6a0108c332ee61db9099852e5ed1d1f603beca41772", kill_on_drop: false }`
[INFO] [stdout] 4ac801f4c3b697e12c27d6a0108c332ee61db9099852e5ed1d1f603beca41772