[INFO] fetching crate flo_binding 1.1.0...
[INFO] testing flo_binding-1.1.0 against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] extracting crate flo_binding 1.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate flo_binding 1.1.0 on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flo_binding 1.1.0
[INFO] finished tweaking crates.io crate flo_binding 1.1.0
[INFO] tweaked toml for crates.io crate flo_binding 1.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 93821dc287f618f607b0d26e6a49c666b14c974d624d169e46f245fe7c21d7ad
[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" "93821dc287f618f607b0d26e6a49c666b14c974d624d169e46f245fe7c21d7ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "93821dc287f618f607b0d26e6a49c666b14c974d624d169e46f245fe7c21d7ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93821dc287f618f607b0d26e6a49c666b14c974d624d169e46f245fe7c21d7ad", kill_on_drop: false }`
[INFO] [stdout] 93821dc287f618f607b0d26e6a49c666b14c974d624d169e46f245fe7c21d7ad
[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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", 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] f29a6b816cabdd37dd1eceef365bdcffcded26c489d299bb2fe67e2d731c4ba5
[INFO] running `Command { std: "docker" "start" "-a" "f29a6b816cabdd37dd1eceef365bdcffcded26c489d299bb2fe67e2d731c4ba5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.35
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]    Compiling once_cell v1.4.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.16
[INFO] [stderr]    Compiling futures-sink v0.3.5
[INFO] [stderr]    Compiling futures-core v0.3.5
[INFO] [stderr]    Compiling futures-io v0.3.5
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling pin-project v0.4.22
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling futures-executor v0.3.5
[INFO] [stderr]    Compiling futures v0.3.5
[INFO] [stderr]    Compiling desync v0.5.0
[INFO] [stderr]    Compiling flo_binding v1.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `watcher`
[INFO] [stdout]   --> src/follow.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     watcher: Box<dyn Releasable>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.65s
[INFO] running `Command { std: "docker" "inspect" "f29a6b816cabdd37dd1eceef365bdcffcded26c489d299bb2fe67e2d731c4ba5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f29a6b816cabdd37dd1eceef365bdcffcded26c489d299bb2fe67e2d731c4ba5", kill_on_drop: false }`
[INFO] [stdout] f29a6b816cabdd37dd1eceef365bdcffcded26c489d299bb2fe67e2d731c4ba5
[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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fcc49b6e8ff6a5d9da5a2f8128ab4a99ce019c7adc71b46317fa091ee06ce04
[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" "5fcc49b6e8ff6a5d9da5a2f8128ab4a99ce019c7adc71b46317fa091ee06ce04", kill_on_drop: false }`
[INFO] [stderr]    Compiling flo_binding v1.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `watcher`
[INFO] [stdout]   --> src/follow.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     watcher: Box<dyn Releasable>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::prelude`
[INFO] [stdout]    --> src/follow.rs:118:9
[INFO] [stdout]     |
[INFO] [stdout] 118 |     use futures::prelude::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `watcher`
[INFO] [stdout]   --> src/follow.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     watcher: Box<dyn Releasable>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 6.58s
[INFO] running `Command { std: "docker" "inspect" "5fcc49b6e8ff6a5d9da5a2f8128ab4a99ce019c7adc71b46317fa091ee06ce04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fcc49b6e8ff6a5d9da5a2f8128ab4a99ce019c7adc71b46317fa091ee06ce04", kill_on_drop: false }`
[INFO] [stdout] 5fcc49b6e8ff6a5d9da5a2f8128ab4a99ce019c7adc71b46317fa091ee06ce04
[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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "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] 277d58035222dcc5d6643b6defd7446c538f08bb7bcb7b0bf5a41ce609a5e58b
[INFO] running `Command { std: "docker" "start" "-a" "277d58035222dcc5d6643b6defd7446c538f08bb7bcb7b0bf5a41ce609a5e58b", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `futures::prelude`
[INFO] [stderr]    --> src/follow.rs:118:9
[INFO] [stderr]     |
[INFO] [stderr] 118 |     use futures::prelude::*;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `watcher`
[INFO] [stderr]   --> src/follow.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     watcher: Box<dyn Releasable>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `watcher`
[INFO] [stderr]   --> src/follow.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     watcher: Box<dyn Releasable>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/flo_binding-de75ea206da7e0d8
[INFO] [stdout] running 38 tests
[INFO] [stdout] test bindref::test::bind_ref_from_value ... ok
[INFO] [stdout] test bindref::test::bindref_matches_core_value_when_created_from_ref ... ok
[INFO] [stdout] test bindref::test::bindref_matches_core_value ... ok
[INFO] [stdout] test follow::test::stream_is_immediately_ready_after_write ... ok
[INFO] [stdout] test test::binding_context_is_notified ... ok
[INFO] [stdout] test follow::test::follow_stream_has_initial_value ... ok
[INFO] [stdout] test test::can_compute_value ... ok
[INFO] [stdout] test bindref::test::bind_ref_from_computed ... ok
[INFO] [stdout] test follow::test::stream_is_unready_after_first_read ... ok
[INFO] [stdout] test follow::test::follow_stream_updates ... ok
[INFO] [stdout] test test::can_recursively_compute_values ... ok
[INFO] [stdout] test test::can_create_binding ... ok
[INFO] [stdout] test test::can_recompute_value ... ok
[INFO] [stdout] test test::computed_caches_values ... ok
[INFO] [stdout] test test::computed_doesnt_notify_more_than_once ... ok
[INFO] [stdout] test test::computed_notifies_of_changes ... ok
[INFO] [stdout] test test::can_recursively_compute_values_2 ... ok
[INFO] [stdout] test bind_stream::test::stream_in_all_values ... ok
[INFO] [stdout] test test::can_recursively_compute_values_3 ... ok
[INFO] [stdout] test test::can_update_binding ... ok
[INFO] [stdout] test test::dispatches_multiple_notifications ... ok
[INFO] [stdout] test test::notified_on_change ... ok
[INFO] [stdout] test test::notifies_after_each_change ... ok
[INFO] [stdout] test bind_stream::test::stream_processes_updates ... ok
[INFO] [stdout] test bind_stream::test::notifies_on_change ... ok
[INFO] [stdout] test test::computed_only_recomputes_as_needed ... ok
[INFO] [stdout] test test::not_notified_on_no_change ... ok
[INFO] [stdout] test test::release_only_affects_one_notification ... ok
[INFO] [stdout] test test::computed_propagates_changes ... ok
[INFO] [stdout] test test::computed_stops_notifying_when_released ... ok
[INFO] [stdout] test test::computed_stops_notifying_once_out_of_scope ... ok
[INFO] [stdout] test test::stops_notifying_after_release ... ok
[INFO] [stdout] test test::computed_switches_dependencies ... ok
[INFO] [stdout] test bind_stream::test::no_notification_on_no_change ... ok
[INFO] [stdout] test follow::test::will_wake_when_binding_is_updated ... ok
[INFO] [stdout] test test::panics_if_computed_generated_during_binding ... ok
[INFO] [stdout] test test::change_during_computation_recomputes ... ok
[INFO] [stdout] test follow::test::computed_updates_during_read ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 38 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests flo_binding
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "277d58035222dcc5d6643b6defd7446c538f08bb7bcb7b0bf5a41ce609a5e58b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "277d58035222dcc5d6643b6defd7446c538f08bb7bcb7b0bf5a41ce609a5e58b", kill_on_drop: false }`
[INFO] [stdout] 277d58035222dcc5d6643b6defd7446c538f08bb7bcb7b0bf5a41ce609a5e58b