[INFO] crate flo_binding 1.0.0 is already in cache
[INFO] extracting crate flo_binding 1.0.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/flo_binding/1.0.0
[INFO] extracting crate flo_binding 1.0.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/flo_binding/1.0.0
[INFO] validating manifest of flo_binding-1.0.0 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_binding-1.0.0 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_binding-1.0.0
[INFO] finished frobbing flo_binding-1.0.0
[INFO] frobbed toml for flo_binding-1.0.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/flo_binding/1.0.0/Cargo.toml
[INFO] started frobbing flo_binding-1.0.0
[INFO] finished frobbing flo_binding-1.0.0
[INFO] frobbed toml for flo_binding-1.0.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/flo_binding/1.0.0/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_binding-1.0.0 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/flo_binding/1.0.0:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 0f5ef59a9f7a67f565d8867b6381d6b6ee3b049311239945c44925f7b1c4bc01
[INFO] running `"docker" "start" "-a" "0f5ef59a9f7a67f565d8867b6381d6b6ee3b049311239945c44925f7b1c4bc01"`
[INFO] [stderr]    Compiling desync v0.4.1
[INFO] [stderr]    Compiling flo_binding v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/computed.rs:232:17
[INFO] [stderr]     |
[INFO] [stderr] 232 |             let mut to_notify = ComputedBinding { core: to_notify };
[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] warning: field is never used: `watcher`
[INFO] [stderr]   --> src/follow.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     watcher: Box<dyn Releasable>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.04s
[INFO] running `"docker" "inspect" "0f5ef59a9f7a67f565d8867b6381d6b6ee3b049311239945c44925f7b1c4bc01"`
[INFO] running `"docker" "rm" "-f" "0f5ef59a9f7a67f565d8867b6381d6b6ee3b049311239945c44925f7b1c4bc01"`
[INFO] [stdout] 0f5ef59a9f7a67f565d8867b6381d6b6ee3b049311239945c44925f7b1c4bc01
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/flo_binding/1.0.0:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 8238c7e5fc209e647f59a74450ceb8163fc492eb3565816fb373d1ca744c033c
[INFO] running `"docker" "start" "-a" "8238c7e5fc209e647f59a74450ceb8163fc492eb3565816fb373d1ca744c033c"`
[INFO] [stderr]    Compiling flo_binding v1.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/computed.rs:232:17
[INFO] [stderr]     |
[INFO] [stderr] 232 |             let mut to_notify = ComputedBinding { core: to_notify };
[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] warning: field is never used: `watcher`
[INFO] [stderr]   --> src/follow.rs:47:5
[INFO] [stderr]    |
[INFO] [stderr] 47 |     watcher: Box<dyn Releasable>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.21s
[INFO] running `"docker" "inspect" "8238c7e5fc209e647f59a74450ceb8163fc492eb3565816fb373d1ca744c033c"`
[INFO] running `"docker" "rm" "-f" "8238c7e5fc209e647f59a74450ceb8163fc492eb3565816fb373d1ca744c033c"`
[INFO] [stdout] 8238c7e5fc209e647f59a74450ceb8163fc492eb3565816fb373d1ca744c033c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/flo_binding/1.0.0:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 7ad688c2c8a0f9a52e14b69aa1b806aa0d71c4849b00d774e09664a76eeec7d1
[INFO] running `"docker" "start" "-a" "7ad688c2c8a0f9a52e14b69aa1b806aa0d71c4849b00d774e09664a76eeec7d1"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/flo_binding-a280e06d1bd2b136
[INFO] [stdout] 
[INFO] [stdout] running 38 tests
[INFO] [stdout] test bindref::test::bind_ref_from_value ... ok
[INFO] [stdout] test bindref::test::bind_ref_from_computed ... 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 follow::test::stream_is_immediate_ready_after_write ... ok
[INFO] [stdout] test follow::test::follow_stream_has_initial_value ... 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::binding_context_is_notified ... ok
[INFO] [stdout] test test::can_compute_value ... ok
[INFO] [stdout] test test::can_create_binding ... 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 test::can_recompute_value ... ok
[INFO] [stdout] test test::can_recursively_compute_values ... ok
[INFO] [stdout] test test::can_recursively_compute_values_2 ... ok
[INFO] [stdout] test test::can_update_binding ... ok
[INFO] [stdout] test test::can_recursively_compute_values_3 ... ok
[INFO] [stdout] test bind_stream::test::notifies_on_change ... ok
[INFO] [stdout] test bind_stream::test::no_notification_on_no_change ... 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 test::computed_caches_values ... ok
[INFO] [stdout] test test::computed_notifies_of_changes ... ok
[INFO] [stdout] test test::computed_propagates_changes ... ok
[INFO] [stdout] test test::computed_doesnt_notify_more_than_once ... ok
[INFO] [stdout] test test::computed_stops_notifying_when_released ... ok
[INFO] [stdout] test test::computed_switches_dependencies ... 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 test::release_only_affects_one_notification ... ok
[INFO] [stdout] test test::not_notified_on_no_change ... ok
[INFO] [stdout] test test::stops_notifying_after_release ... 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 `"docker" "inspect" "7ad688c2c8a0f9a52e14b69aa1b806aa0d71c4849b00d774e09664a76eeec7d1"`
[INFO] running `"docker" "rm" "-f" "7ad688c2c8a0f9a52e14b69aa1b806aa0d71c4849b00d774e09664a76eeec7d1"`
[INFO] [stdout] 7ad688c2c8a0f9a52e14b69aa1b806aa0d71c4849b00d774e09664a76eeec7d1