[INFO] cloning repository https://github.com/dwrensha/zillions
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dwrensha/zillions" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdwrensha%2Fzillions", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdwrensha%2Fzillions'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6bfeda5fc6f5f12d91be3638ab92867198f0fa84
[INFO] checking dwrensha/zillions against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdwrensha%2Fzillions" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dwrensha/zillions
[INFO] finished tweaking git repo https://github.com/dwrensha/zillions
[INFO] tweaked toml for git repo https://github.com/dwrensha/zillions written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dwrensha/zillions on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dwrensha/zillions already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking dwrensha/zillions against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdwrensha%2Fzillions" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dwrensha/zillions
[INFO] finished tweaking git repo https://github.com/dwrensha/zillions
[INFO] tweaked toml for git repo https://github.com/dwrensha/zillions written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dwrensha/zillions on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dwrensha/zillions already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lazycell v0.4.0
[INFO] [stderr]   Downloaded num_cpus v1.3.0
[INFO] [stderr]   Downloaded tokio-io v0.1.0
[INFO] [stderr]   Downloaded bitflags v0.8.0
[INFO] [stderr]   Downloaded vec_map v0.7.0
[INFO] [stderr]   Downloaded net2 v0.2.27
[INFO] [stderr]   Downloaded bytes v0.4.1
[INFO] [stderr]   Downloaded tokio-core v0.1.6
[INFO] [stderr]   Downloaded futures v0.1.11
[INFO] [stderr]   Downloaded mio v0.6.6
[INFO] [stderr]   Downloaded libc v0.2.21
[INFO] [stderr]   Downloaded clap v2.21.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 77e0d149b6cc1dbaf7d664d2434dc36820d8422bd24d064b62090c2c40b6e3a6
[INFO] running `Command { std: "docker" "start" "-a" "77e0d149b6cc1dbaf7d664d2434dc36820d8422bd24d064b62090c2c40b6e3a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "77e0d149b6cc1dbaf7d664d2434dc36820d8422bd24d064b62090c2c40b6e3a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77e0d149b6cc1dbaf7d664d2434dc36820d8422bd24d064b62090c2c40b6e3a6", kill_on_drop: false }`
[INFO] [stdout] 77e0d149b6cc1dbaf7d664d2434dc36820d8422bd24d064b62090c2c40b6e3a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dfbad5fd40e7e98cea12c6eab0fa45891187e25656519014a3dc6374cc2d3b79
[INFO] running `Command { std: "docker" "start" "-a" "dfbad5fd40e7e98cea12c6eab0fa45891187e25656519014a3dc6374cc2d3b79", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]     Checking log v0.3.7
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]     Checking byteorder v1.0.0
[INFO] [stderr]     Checking futures v0.1.11
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking lazycell v0.4.0
[INFO] [stderr]     Checking vec_map v0.7.0
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking scoped-tls v0.1.0
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking bitflags v0.8.0
[INFO] [stderr]     Checking unicode-segmentation v1.1.0
[INFO] [stderr]     Checking byteorder v0.5.3
[INFO] [stderr]     Checking iovec v0.1.0
[INFO] [stderr]     Checking net2 v0.2.27
[INFO] [stderr]     Checking atty v0.2.2
[INFO] [stderr]     Checking num_cpus v1.3.0
[INFO] [stderr]     Checking term_size v0.2.3
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking bytes v0.4.1
[INFO] [stderr]     Checking clap v2.21.2
[INFO] [stderr]     Checking mio v0.6.6
[INFO] [stderr]     Checking tokio-io v0.1.0
[INFO] [stderr]     Checking futures-cpupool v0.1.5
[INFO] [stderr]     Checking tokio-core v0.1.6
[INFO] [stderr]     Checking zillions v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused macro definition: `fry`
[INFO] [stdout]   --> src/stresstest.rs:22:14
[INFO] [stdout]    |
[INFO] [stdout] 22 | macro_rules! fry {
[INFO] [stdout]    |              ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/stresstest.rs:488:5
[INFO] [stdout]     |
[INFO] [stdout] 488 |     try!(::std::io::BufRead::read_line(&mut child_stdout, &mut first_line));
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/stresstest.rs:478:21
[INFO] [stdout]     |
[INFO] [stdout] 478 |     let mut child = try!(::std::process::Command::new(executable)
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/stresstest.rs:499:20
[INFO] [stdout]     |
[INFO] [stdout] 499 |     let mut core = try!(::tokio_core::reactor::Core::new());
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/stresstest.rs:531:17
[INFO] [stdout]     |
[INFO] [stdout] 531 |                 try!(initialize_subscribers(
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/stresstest.rs:567:37
[INFO] [stdout]     |
[INFO] [stdout] 567 |         let successfully_received = try!(core.run(read_tasks));
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> src/commandline-client.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut socket = try!(::std::net::TcpStream::connect(addr));
[INFO] [stdout]   |                      ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/commandline-client.rs:11:27
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut read_stream = try!(socket.try_clone());
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]  --> src/commandline-client.rs:9:22
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let mut socket = try!(::std::net::TcpStream::connect(addr));
[INFO] [stdout]   |                      ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/commandline-client.rs:11:27
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut read_stream = try!(socket.try_clone());
[INFO] [stdout]    |                           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition: `fry`
[INFO] [stdout]   --> src/stresstest.rs:22:14
[INFO] [stdout]    |
[INFO] [stdout] 22 | macro_rules! fry {
[INFO] [stdout]    |              ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/stresstest.rs:488:5
[INFO] [stdout]     |
[INFO] [stdout] 488 |     try!(::std::io::BufRead::read_line(&mut child_stdout, &mut first_line));
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/stresstest.rs:478:21
[INFO] [stdout]     |
[INFO] [stdout] 478 |     let mut child = try!(::std::process::Command::new(executable)
[INFO] [stdout]     |                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/stresstest.rs:499:20
[INFO] [stdout]     |
[INFO] [stdout] 499 |     let mut core = try!(::tokio_core::reactor::Core::new());
[INFO] [stdout]     |                    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/stresstest.rs:531:17
[INFO] [stdout]     |
[INFO] [stdout] 531 |                 try!(initialize_subscribers(
[INFO] [stdout]     |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/stresstest.rs:567:37
[INFO] [stdout]     |
[INFO] [stdout] 567 |         let successfully_received = try!(core.run(read_tasks));
[INFO] [stdout]     |                                     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/stresstest.rs:257:20
[INFO] [stdout]     |
[INFO] [stdout] 257 |     -> Result<(Box<Future<Item=u64, Error=::std::io::Error> + Send>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 257 |     -> Result<(Box<dyn Future<Item=u64, Error=::std::io::Error> + Send>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/stresstest.rs:258:20
[INFO] [stdout]     |
[INFO] [stdout] 258 |                  Box<Future<Item=Vec<::futures::sync::mpsc::UnboundedSender<ChannelElem>>,
[INFO] [stdout]     |  ____________________^
[INFO] [stdout] 259 | |                           Error=::std::io::Error>>),
[INFO] [stdout]     | |_________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 258 |                Box<dyn Future<Item=Vec<::futures::sync::mpsc::UnboundedSender<ChannelElem>>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/stresstest.rs:339:12
[INFO] [stdout]     |
[INFO] [stdout] 339 |     -> Box<Future<Item=(), Error=::std::io::Error>>
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 339 |     -> Box<dyn Future<Item=(), Error=::std::io::Error>>
[INFO] [stdout]     |            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/stresstest.rs:257:20
[INFO] [stdout]     |
[INFO] [stdout] 257 |     -> Result<(Box<Future<Item=u64, Error=::std::io::Error> + Send>,
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 257 |     -> Result<(Box<dyn Future<Item=u64, Error=::std::io::Error> + Send>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/stresstest.rs:258:20
[INFO] [stdout]     |
[INFO] [stdout] 258 |                  Box<Future<Item=Vec<::futures::sync::mpsc::UnboundedSender<ChannelElem>>,
[INFO] [stdout]     |  ____________________^
[INFO] [stdout] 259 | |                           Error=::std::io::Error>>),
[INFO] [stdout]     | |_________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 258 |                Box<dyn Future<Item=Vec<::futures::sync::mpsc::UnboundedSender<ChannelElem>>,
[INFO] [stdout]     |                    +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/stresstest.rs:339:12
[INFO] [stdout]     |
[INFO] [stdout] 339 |     -> Box<Future<Item=(), Error=::std::io::Error>>
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 339 |     -> Box<dyn Future<Item=(), Error=::std::io::Error>>
[INFO] [stdout]     |            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/stresstest.rs:264:44
[INFO] [stdout]     |
[INFO] [stdout] 264 |       let mut subscriber_senders: Option<Box<Future<Item=Vec<::futures::sync::mpsc::UnboundedSender<ChannelElem>>,
[INFO] [stdout]     |  ____________________________________________^
[INFO] [stdout] 265 | |                                                   Error=::std::io::Error> + Send>> =
[INFO] [stdout]     | |________________________________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 264 |     let mut subscriber_senders: Option<Box<dyn Future<Item=Vec<::futures::sync::mpsc::UnboundedSender<ChannelElem>>,
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/stresstest.rs:264:44
[INFO] [stdout]     |
[INFO] [stdout] 264 |       let mut subscriber_senders: Option<Box<Future<Item=Vec<::futures::sync::mpsc::UnboundedSender<ChannelElem>>,
[INFO] [stdout]     |  ____________________________________________^
[INFO] [stdout] 265 | |                                                   Error=::std::io::Error> + Send>> =
[INFO] [stdout]     | |________________________________________________________________________________^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 264 |     let mut subscriber_senders: Option<Box<dyn Future<Item=Vec<::futures::sync::mpsc::UnboundedSender<ChannelElem>>,
[INFO] [stdout]     |                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.26s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: bitflags v0.8.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "dfbad5fd40e7e98cea12c6eab0fa45891187e25656519014a3dc6374cc2d3b79", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfbad5fd40e7e98cea12c6eab0fa45891187e25656519014a3dc6374cc2d3b79", kill_on_drop: false }`
[INFO] [stdout] dfbad5fd40e7e98cea12c6eab0fa45891187e25656519014a3dc6374cc2d3b79
