[INFO] fetching crate udt 0.2.0...
[INFO] testing udt-0.2.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate udt 0.2.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate udt 0.2.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate udt 0.2.0
[INFO] removed path dependency libudt4-sys from crates.io crate udt 0.2.0
[INFO] finished tweaking crates.io crate udt 0.2.0
[INFO] tweaked toml for crates.io crate udt 0.2.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5467cc3927ac0191ae8fb06798eccfb565bf9632b6644e37d79a68d7e4e0a518
[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" "5467cc3927ac0191ae8fb06798eccfb565bf9632b6644e37d79a68d7e4e0a518", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5467cc3927ac0191ae8fb06798eccfb565bf9632b6644e37d79a68d7e4e0a518", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5467cc3927ac0191ae8fb06798eccfb565bf9632b6644e37d79a68d7e4e0a518", kill_on_drop: false }`
[INFO] [stdout] 5467cc3927ac0191ae8fb06798eccfb565bf9632b6644e37d79a68d7e4e0a518
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93fbbf2e340961e0b18d7e5a8200810e819a220363d4af5178f87d0968dd5fe6
[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" "93fbbf2e340961e0b18d7e5a8200810e819a220363d4af5178f87d0968dd5fe6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libudt4-sys v0.2.0
[INFO] [stderr]    Compiling udt v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:92:1
[INFO] [stdout]     |
[INFO] [stdout] 92  | / bitflags! {
[INFO] [stdout] 93  | | /// This is a bitflag field that can be constructed with `UDT_EPOLL_IN`, `UDT_EPOLL_OUT`, or
[INFO] [stdout] 94  | | /// `UDT_EPOLL_ERR`
[INFO] [stdout] 95  | | ///
[INFO] [stdout] ...   |
[INFO] [stdout] 112 | |     }
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:92:1
[INFO] [stdout]     |
[INFO] [stdout] 92  | / bitflags! {
[INFO] [stdout] 93  | | /// This is a bitflag field that can be constructed with `UDT_EPOLL_IN`, `UDT_EPOLL_OUT`, or
[INFO] [stdout] 94  | | /// `UDT_EPOLL_ERR`
[INFO] [stdout] 95  | | ///
[INFO] [stdout] ...   |
[INFO] [stdout] 112 | |     }
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lib.rs:49:23
[INFO] [stdout]    |
[INFO] [stdout] 49 | use std::sync::{Once, ONCE_INIT};
[INFO] [stdout]    |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/lib.rs:134:25
[INFO] [stdout]     |
[INFO] [stdout] 134 |     static INIT: Once = ONCE_INIT;
[INFO] [stdout]     |                         ^^^^^^^^^ help: replace the use of the deprecated constant: `Once::new()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.67s
[INFO] running `Command { std: "docker" "inspect" "93fbbf2e340961e0b18d7e5a8200810e819a220363d4af5178f87d0968dd5fe6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93fbbf2e340961e0b18d7e5a8200810e819a220363d4af5178f87d0968dd5fe6", kill_on_drop: false }`
[INFO] [stdout] 93fbbf2e340961e0b18d7e5a8200810e819a220363d4af5178f87d0968dd5fe6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d41859226c3a7a410a9254c4ece6324be1b3676b87528734b531a427b383fade
[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" "d41859226c3a7a410a9254c4ece6324be1b3676b87528734b531a427b383fade", kill_on_drop: false }`
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:92:1
[INFO] [stdout]     |
[INFO] [stdout] 92  | / bitflags! {
[INFO] [stdout] 93  | | /// This is a bitflag field that can be constructed with `UDT_EPOLL_IN`, `UDT_EPOLL_OUT`, or
[INFO] [stdout] 94  | | /// `UDT_EPOLL_ERR`
[INFO] [stdout] 95  | | ///
[INFO] [stdout] ...   |
[INFO] [stdout] 112 | |     }
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:92:1
[INFO] [stdout]     |
[INFO] [stdout] 92  | / bitflags! {
[INFO] [stdout] 93  | | /// This is a bitflag field that can be constructed with `UDT_EPOLL_IN`, `UDT_EPOLL_OUT`, or
[INFO] [stdout] 94  | | /// `UDT_EPOLL_ERR`
[INFO] [stdout] 95  | | ///
[INFO] [stdout] ...   |
[INFO] [stdout] 112 | |     }
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lib.rs:49:23
[INFO] [stdout]    |
[INFO] [stdout] 49 | use std::sync::{Once, ONCE_INIT};
[INFO] [stdout]    |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/lib.rs:134:25
[INFO] [stdout]     |
[INFO] [stdout] 134 |     static INIT: Once = ONCE_INIT;
[INFO] [stdout]     |                         ^^^^^^^^^ help: replace the use of the deprecated constant: `Once::new()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling udt v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:92:1
[INFO] [stdout]     |
[INFO] [stdout] 92  | / bitflags! {
[INFO] [stdout] 93  | | /// This is a bitflag field that can be constructed with `UDT_EPOLL_IN`, `UDT_EPOLL_OUT`, or
[INFO] [stdout] 94  | | /// `UDT_EPOLL_ERR`
[INFO] [stdout] 95  | | ///
[INFO] [stdout] ...   |
[INFO] [stdout] 112 | |     }
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:92:1
[INFO] [stdout]     |
[INFO] [stdout] 92  | / bitflags! {
[INFO] [stdout] 93  | | /// This is a bitflag field that can be constructed with `UDT_EPOLL_IN`, `UDT_EPOLL_OUT`, or
[INFO] [stdout] 94  | | /// `UDT_EPOLL_ERR`
[INFO] [stdout] 95  | | ///
[INFO] [stdout] ...   |
[INFO] [stdout] 112 | |     }
[INFO] [stdout] 113 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]   --> src/lib.rs:49:23
[INFO] [stdout]    |
[INFO] [stdout] 49 | use std::sync::{Once, ONCE_INIT};
[INFO] [stdout]    |                       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/lib.rs:134:25
[INFO] [stdout]     |
[INFO] [stdout] 134 |     static INIT: Once = ONCE_INIT;
[INFO] [stdout]     |                         ^^^^^^^^^ help: replace the use of the deprecated constant: `Once::new()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]     --> src/lib.rs:1057:76
[INFO] [stdout]      |
[INFO] [stdout] 1057 |     sock.bind(SocketAddr::V4(SocketAddrV4::new(localhost, 0))).or_else(|e| Err(panic!("Failed to bind to {:?} --> {:?}", localhost, e)));
[INFO] [stdout]      |                                                                            ^^^ ------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout]      |                                                                            |
[INFO] [stdout]      |                                                                            unreachable call
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable call
[INFO] [stdout]     --> src/lib.rs:1078:76
[INFO] [stdout]      |
[INFO] [stdout] 1078 |     sock.bind(SocketAddr::V4(SocketAddrV4::new(localhost, 0))).or_else(|e| Err(panic!("Failed to bind to {:?} --> {:?}", localhost, e)));
[INFO] [stdout]      |                                                                            ^^^ ------------------------------------------------------- any code following this expression is unreachable
[INFO] [stdout]      |                                                                            |
[INFO] [stdout]      |                                                                            unreachable call
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]     --> src/lib.rs:1057:5
[INFO] [stdout]      |
[INFO] [stdout] 1057 |     sock.bind(SocketAddr::V4(SocketAddrV4::new(localhost, 0))).or_else(|e| Err(panic!("Failed to bind to {:?} --> {:?}", localhost, e)));
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]     --> src/lib.rs:1078:5
[INFO] [stdout]      |
[INFO] [stdout] 1078 |     sock.bind(SocketAddr::V4(SocketAddrV4::new(localhost, 0))).or_else(|e| Err(panic!("Failed to bind to {:?} --> {:?}", localhost, e)));
[INFO] [stdout]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.43s
[INFO] running `Command { std: "docker" "inspect" "d41859226c3a7a410a9254c4ece6324be1b3676b87528734b531a427b383fade", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d41859226c3a7a410a9254c4ece6324be1b3676b87528734b531a427b383fade", kill_on_drop: false }`
[INFO] [stdout] d41859226c3a7a410a9254c4ece6324be1b3676b87528734b531a427b383fade
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "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] a637b275483a3412e8c7b04fb5ed38e2b81393fde28102f1492fb4c797c6c384
[INFO] running `Command { std: "docker" "start" "-a" "a637b275483a3412e8c7b04fb5ed38e2b81393fde28102f1492fb4c797c6c384", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout] running 3 tests
[INFO] [stderr]    --> src/lib.rs:92:1
[INFO] [stderr]     |
[INFO] [stderr] 92  | / bitflags! {
[INFO] [stderr] 93  | | /// This is a bitflag field that can be constructed with `UDT_EPOLL_IN`, `UDT_EPOLL_OUT`, or
[INFO] [stderr] 94  | | /// `UDT_EPOLL_ERR`
[INFO] [stderr] 95  | | ///
[INFO] [stderr] ...   |
[INFO] [stderr] 112 | |     }
[INFO] [stderr] 113 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:92:1
[INFO] [stderr]     |
[INFO] [stderr] 92  | / bitflags! {
[INFO] [stderr] 93  | | /// This is a bitflag field that can be constructed with `UDT_EPOLL_IN`, `UDT_EPOLL_OUT`, or
[INFO] [stderr] 94  | | /// `UDT_EPOLL_ERR`
[INFO] [stderr] 95  | | ///
[INFO] [stderr] ...   |
[INFO] [stderr] 112 | |     }
[INFO] [stderr] 113 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stderr]   --> src/lib.rs:49:23
[INFO] [stderr]    |
[INFO] [stderr] 49 | use std::sync::{Once, ONCE_INIT};
[INFO] [stderr]    |                       ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stderr]    --> src/lib.rs:134:25
[INFO] [stderr]     |
[INFO] [stderr] 134 |     static INIT: Once = ONCE_INIT;
[INFO] [stderr]     |                         ^^^^^^^^^ help: replace the use of the deprecated constant: `Once::new()`
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:92:1
[INFO] [stderr]     |
[INFO] [stderr] 92  | / bitflags! {
[INFO] [stderr] 93  | | /// This is a bitflag field that can be constructed with `UDT_EPOLL_IN`, `UDT_EPOLL_OUT`, or
[INFO] [stderr] 94  | | /// `UDT_EPOLL_ERR`
[INFO] [stderr] 95  | | ///
[INFO] [stderr] ...   |
[INFO] [stderr] 112 | |     }
[INFO] [stderr] 113 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:92:1
[INFO] [stderr]     |
[INFO] [stderr] 92  | / bitflags! {
[INFO] [stderr] 93  | | /// This is a bitflag field that can be constructed with `UDT_EPOLL_IN`, `UDT_EPOLL_OUT`, or
[INFO] [stderr] 94  | | /// `UDT_EPOLL_ERR`
[INFO] [stderr] 95  | | ///
[INFO] [stderr] ...   |
[INFO] [stderr] 112 | |     }
[INFO] [stderr] 113 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stderr]   --> src/lib.rs:49:23
[INFO] [stderr]    |
[INFO] [stderr] 49 | use std::sync::{Once, ONCE_INIT};
[INFO] [stderr]    |                       ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stderr]    --> src/lib.rs:134:25
[INFO] [stderr]     |
[INFO] [stderr] 134 |     static INIT: Once = ONCE_INIT;
[INFO] [stderr]     |                         ^^^^^^^^^ help: replace the use of the deprecated constant: `Once::new()`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable call
[INFO] [stderr]     --> src/lib.rs:1057:76
[INFO] [stderr]      |
[INFO] [stderr] 1057 |     sock.bind(SocketAddr::V4(SocketAddrV4::new(localhost, 0))).or_else(|e| Err(panic!("Failed to bind to {:?} --> {:?}", localhost, e)));
[INFO] [stderr]      |                                                                            ^^^ ------------------------------------------------------- any code following this expression is unreachable
[INFO] [stderr]      |                                                                            |
[INFO] [stderr]      |                                                                            unreachable call
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable call
[INFO] [stderr]     --> src/lib.rs:1078:76
[INFO] [stderr]      |
[INFO] [stderr] 1078 |     sock.bind(SocketAddr::V4(SocketAddrV4::new(localhost, 0))).or_else(|e| Err(panic!("Failed to bind to {:?} --> {:?}", localhost, e)));
[INFO] [stderr]      |                                                                            ^^^ ------------------------------------------------------- any code following this expression is unreachable
[INFO] [stderr]      |                                                                            |
[INFO] [stderr]      |                                                                            unreachable call
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]     --> src/lib.rs:1057:5
[INFO] [stderr]      |
[INFO] [stderr] 1057 |     sock.bind(SocketAddr::V4(SocketAddrV4::new(localhost, 0))).or_else(|e| Err(panic!("Failed to bind to {:?} --> {:?}", localhost, e)));
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]     --> src/lib.rs:1078:5
[INFO] [stderr]      |
[INFO] [stderr] 1078 |     sock.bind(SocketAddr::V4(SocketAddrV4::new(localhost, 0))).or_else(|e| Err(panic!("Failed to bind to {:?} --> {:?}", localhost, e)));
[INFO] [stderr]      |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/udt-6140490885e84ee2
[INFO] [stdout] test test_udt_bind ... ok
[INFO] [stdout] test test_udt_socket ... ok
[INFO] [stdout] test test_udt_socket_state ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/test-a08fdae51042e7b6
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test test_epoll3 ... ok
[INFO] [stdout] test test_setsockopt ... ok
[INFO] [stdout] test test_getsockopt ... ok
[INFO] [stdout] test test_send ... ok
[INFO] [stdout] test test_sendmsg ... ok
[INFO] [stdout] test test_epoll ... ok
[INFO] [stdout] test test_epoll2 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests udt
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/lib.rs - (line 21) ... ok
[INFO] [stdout] test src/lib.rs - UdtOpts (line 188) ... ok
[INFO] [stdout] test src/lib.rs - EpollEvents (line 97) ... ok
[INFO] [stdout] test src/lib.rs - UdtSocket::getsockopt (line 844) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a637b275483a3412e8c7b04fb5ed38e2b81393fde28102f1492fb4c797c6c384", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a637b275483a3412e8c7b04fb5ed38e2b81393fde28102f1492fb4c797c6c384", kill_on_drop: false }`
[INFO] [stdout] a637b275483a3412e8c7b04fb5ed38e2b81393fde28102f1492fb4c797c6c384