[INFO] crate messenger 0.1.0 is already in cache
[INFO] checking messenger-0.1.0 against master#4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb for pr-64672
[INFO] extracting crate messenger 0.1.0 into work/builds/worker-6/source
[INFO] validating manifest of crates.io crate messenger 0.1.0 on toolchain 4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate messenger 0.1.0
[INFO] finished tweaking crates.io crate messenger 0.1.0
[INFO] tweaked toml for crates.io crate messenger 0.1.0 written to work/builds/worker-6/source/Cargo.toml
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+4ff32c07da9d97e6dc315a4a5c9ffbb797cb27bb" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3a5efcb16f908ea0f1a0738eef630a40bdafcffb75eae52b7ba3020b1bdeb721
[INFO] running `"docker" "start" "-a" "3a5efcb16f908ea0f1a0738eef630a40bdafcffb75eae52b7ba3020b1bdeb721"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking messenger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/messenger.rs:9:24
[INFO] [stderr]   |
[INFO] [stderr] 9 | type Callback<T> = Box<Fn(Vec<T>)>;
[INFO] [stderr]   |                        ^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<T>)`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/messenger.rs:12:31
[INFO] [stderr]    |
[INFO] [stderr] 12 | type Subscribe<T> = (u32, Box<Fn(&T) -> Option<T>>);
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&T) -> Option<T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/messenger.rs:16:17
[INFO] [stderr]    |
[INFO] [stderr] 16 |     sender: Box<Sender<Item = Message<T>>>,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Sender<Item = Message<T>>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/messenger.rs:9:24
[INFO] [stderr]   |
[INFO] [stderr] 9 | type Callback<T> = Box<Fn(Vec<T>)>;
[INFO] [stderr]   |                        ^^^^^^^^^^ help: use `dyn`: `dyn Fn(Vec<T>)`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/messenger.rs:12:31
[INFO] [stderr]    |
[INFO] [stderr] 12 | type Subscribe<T> = (u32, Box<Fn(&T) -> Option<T>>);
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&T) -> Option<T>`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/messenger.rs:16:17
[INFO] [stderr]    |
[INFO] [stderr] 16 |     sender: Box<Sender<Item = Message<T>>>,
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Sender<Item = Message<T>>`
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused boxed `std::ops::Fn` trait object in tuple element 1 that must be used
[INFO] [stderr]   --> src/messenger.rs:87:17
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 subscribers.remove(index);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: closures are lazy and do nothing unless called
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(conservative_impl_trait)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused boxed `std::ops::Fn` trait object in tuple element 1 that must be used
[INFO] [stderr]   --> src/messenger.rs:87:17
[INFO] [stderr]    |
[INFO] [stderr] 87 |                 subscribers.remove(index);
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: closures are lazy and do nothing unless called
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'tokio::executor::current_thread': use tokio-current-thread crate or functions in tokio::runtime::current_thread instead
[INFO] [stderr]  --> tests/messenger_test.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use tokio::executor::current_thread;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'tokio::executor::current_thread::run': use block_on_all instead
[INFO] [stderr]   --> tests/messenger_test.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 |     current_thread::run(move |_| {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.03s
[INFO] running `"docker" "inspect" "3a5efcb16f908ea0f1a0738eef630a40bdafcffb75eae52b7ba3020b1bdeb721"`
[INFO] running `"docker" "rm" "-f" "3a5efcb16f908ea0f1a0738eef630a40bdafcffb75eae52b7ba3020b1bdeb721"`
[INFO] [stdout] 3a5efcb16f908ea0f1a0738eef630a40bdafcffb75eae52b7ba3020b1bdeb721