[INFO] fetching crate outer_cgi 0.2.0...
[INFO] checking outer_cgi-0.2.0 against beta-2020-07-24 for pr-75494-beta
[INFO] extracting crate outer_cgi 0.2.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate outer_cgi 0.2.0 on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate outer_cgi 0.2.0
[INFO] finished tweaking crates.io crate outer_cgi 0.2.0
[INFO] tweaked toml for crates.io crate outer_cgi 0.2.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 12927563077b0ef2f6a6eef90d36d52c0f7d18dfd14d70384b000d326a4a8080
[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" "12927563077b0ef2f6a6eef90d36d52c0f7d18dfd14d70384b000d326a4a8080", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12927563077b0ef2f6a6eef90d36d52c0f7d18dfd14d70384b000d326a4a8080", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12927563077b0ef2f6a6eef90d36d52c0f7d18dfd14d70384b000d326a4a8080", kill_on_drop: false }`
[INFO] [stdout] 12927563077b0ef2f6a6eef90d36d52c0f7d18dfd14d70384b000d326a4a8080
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86d65dafbeceec5cfed5c647fcf893a22bcc38d5e1fa6dc5b0068f0a8f612a33
[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" "86d65dafbeceec5cfed5c647fcf893a22bcc38d5e1fa6dc5b0068f0a8f612a33", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.76
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking crossbeam-epoch v0.4.3
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking parking_lot_core v0.2.14
[INFO] [stderr]     Checking parking_lot v0.5.5
[INFO] [stderr]     Checking crossbeam-channel v0.1.3
[INFO] [stderr]     Checking ctrlc v3.1.6
[INFO] [stderr]     Checking outer_cgi v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/unix.rs:106:60
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub fn fix_fds(env: &HashMap<String,String>) -> Option<Box<Listener>> {
[INFO] [stdout]     |                                                            ^^^^^^^^ help: use `dyn`: `dyn Listener`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/fcgi.rs:451:22
[INFO] [stdout]     |
[INFO] [stdout] 451 |     where H: Fn(&mut IO, HashMap<String, String>)
[INFO] [stdout]     |                      ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/fcgi.rs:479:22
[INFO] [stdout]     |
[INFO] [stdout] 479 |     where H: Fn(&mut IO, HashMap<String, String>) -> io::Result<i32> {
[INFO] [stdout]     |                      ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/fcgi.rs:640:28
[INFO] [stdout]     |
[INFO] [stdout] 640 | where H: 'static + Fn(&mut IO, HashMap<String, String>) -> io::Result<i32>
[INFO] [stdout]     |                            ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/fcgi.rs:636:41
[INFO] [stdout]     |
[INFO] [stdout] 636 | pub fn listen_loop<H>(mut listener: Box<Listener>, handler: H,
[INFO] [stdout]     |                                         ^^^^^^^^ help: use `dyn`: `dyn Listener`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/options.rs:37:60
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn fix_fds(env: &HashMap<String,String>) -> Option<Box<Listener>> {
[INFO] [stdout]    |                                                            ^^^^^^^^ help: use `dyn`: `dyn Listener`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/options.rs:161:53
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn handle_command_line<'a>(handlers: &mut [&mut OptionHandler],
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^ help: use `dyn`: `dyn OptionHandler`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:223:28
[INFO] [stdout]     |
[INFO] [stdout] 223 |       H: 'static + Fn(&mut IO, HashMap<String, String>) -> io::Result<i32>
[INFO] [stdout]     |                            ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:237:28
[INFO] [stdout]     |
[INFO] [stdout] 237 |       H: 'static + Fn(&mut IO, HashMap<String, String>) -> io::Result<i32>
[INFO] [stdout]     |                            ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:296:39
[INFO] [stdout]     |
[INFO] [stdout] 296 |                     let listener: Box<Listener> =
[INFO] [stdout]     |                                       ^^^^^^^^ help: use `dyn`: `dyn Listener`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/unix.rs:106:60
[INFO] [stdout]     |
[INFO] [stdout] 106 | pub fn fix_fds(env: &HashMap<String,String>) -> Option<Box<Listener>> {
[INFO] [stdout]     |                                                            ^^^^^^^^ help: use `dyn`: `dyn Listener`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/fcgi.rs:121:36
[INFO] [stdout]     |
[INFO] [stdout] 121 |     let mut b1: [u8; 1] = unsafe { std::mem::uninitialized() };
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/fcgi.rs:130:40
[INFO] [stdout]     |
[INFO] [stdout] 130 |         let mut b2: [u8; 3] = unsafe { std::mem::uninitialized() };
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/fcgi.rs:317:35
[INFO] [stdout]     |
[INFO] [stdout] 317 |                 recvbuf: unsafe { std::mem::uninitialized() },
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/fcgi.rs:325:31
[INFO] [stdout]     |
[INFO] [stdout] 325 |             sendbuf: unsafe { std::mem::uninitialized() },
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/fcgi.rs:451:22
[INFO] [stdout]     |
[INFO] [stdout] 451 |     where H: Fn(&mut IO, HashMap<String, String>)
[INFO] [stdout]     |                      ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/fcgi.rs:479:22
[INFO] [stdout]     |
[INFO] [stdout] 479 |     where H: Fn(&mut IO, HashMap<String, String>) -> io::Result<i32> {
[INFO] [stdout]     |                      ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/fcgi.rs:640:28
[INFO] [stdout]     |
[INFO] [stdout] 640 | where H: 'static + Fn(&mut IO, HashMap<String, String>) -> io::Result<i32>
[INFO] [stdout]     |                            ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/fcgi.rs:636:41
[INFO] [stdout]     |
[INFO] [stdout] 636 | pub fn listen_loop<H>(mut listener: Box<Listener>, handler: H,
[INFO] [stdout]     |                                         ^^^^^^^^ help: use `dyn`: `dyn Listener`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/options.rs:37:60
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn fix_fds(env: &HashMap<String,String>) -> Option<Box<Listener>> {
[INFO] [stdout]    |                                                            ^^^^^^^^ help: use `dyn`: `dyn Listener`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/options.rs:161:53
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn handle_command_line<'a>(handlers: &mut [&mut OptionHandler],
[INFO] [stdout]     |                                                     ^^^^^^^^^^^^^ help: use `dyn`: `dyn OptionHandler`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:223:28
[INFO] [stdout]     |
[INFO] [stdout] 223 |       H: 'static + Fn(&mut IO, HashMap<String, String>) -> io::Result<i32>
[INFO] [stdout]     |                            ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:237:28
[INFO] [stdout]     |
[INFO] [stdout] 237 |       H: 'static + Fn(&mut IO, HashMap<String, String>) -> io::Result<i32>
[INFO] [stdout]     |                            ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:296:39
[INFO] [stdout]     |
[INFO] [stdout] 296 |                     let listener: Box<Listener> =
[INFO] [stdout]     |                                       ^^^^^^^^ help: use `dyn`: `dyn Listener`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/fcgi.rs:121:36
[INFO] [stdout]     |
[INFO] [stdout] 121 |     let mut b1: [u8; 1] = unsafe { std::mem::uninitialized() };
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/fcgi.rs:130:40
[INFO] [stdout]     |
[INFO] [stdout] 130 |         let mut b2: [u8; 3] = unsafe { std::mem::uninitialized() };
[INFO] [stdout]     |                                        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/fcgi.rs:317:35
[INFO] [stdout]     |
[INFO] [stdout] 317 |                 recvbuf: unsafe { std::mem::uninitialized() },
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stdout]    --> src/fcgi.rs:325:31
[INFO] [stdout]     |
[INFO] [stdout] 325 |             sendbuf: unsafe { std::mem::uninitialized() },
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:337:25
[INFO] [stdout]     |
[INFO] [stdout] 337 |                     let mut listener
[INFO] [stdout]     |                         ----^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:337:25
[INFO] [stdout]     |
[INFO] [stdout] 337 |                     let mut listener
[INFO] [stdout]     |                         ----^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]   --> src/unix.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |         nix::unistd::close(write_fd).is_ok(); // ignore error
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]   --> src/unix.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |             nix::unistd::close(write_fd).is_ok(); // ignore result
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]   --> src/unix.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             nix::unistd::close(read_fd).is_ok(); // ignore result
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/fcgi.rs:677:13
[INFO] [stdout]     |
[INFO] [stdout] 677 |             listen_tx.send(to_send).is_ok();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]   --> src/unix.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |         nix::unistd::close(write_fd).is_ok(); // ignore error
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]   --> src/unix.rs:63:13
[INFO] [stdout]    |
[INFO] [stdout] 63 |             nix::unistd::close(write_fd).is_ok(); // ignore result
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]   --> src/unix.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             nix::unistd::close(read_fd).is_ok(); // ignore result
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stdout]    --> src/fcgi.rs:677:13
[INFO] [stdout]     |
[INFO] [stdout] 677 |             listen_tx.send(to_send).is_ok();
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn handler(io: &mut IO, env: HashMap<String,String>) -> io::Result<i32> {
[INFO] [stdout]    |                     ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:12:21
[INFO] [stdout]    |
[INFO] [stdout] 12 | fn handler(io: &mut IO, env: HashMap<String,String>) -> io::Result<i32> {
[INFO] [stdout]    |                     ^^ help: use `dyn`: `dyn IO`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.94s
[INFO] running `Command { std: "docker" "inspect" "86d65dafbeceec5cfed5c647fcf893a22bcc38d5e1fa6dc5b0068f0a8f612a33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86d65dafbeceec5cfed5c647fcf893a22bcc38d5e1fa6dc5b0068f0a8f612a33", kill_on_drop: false }`
[INFO] [stdout] 86d65dafbeceec5cfed5c647fcf893a22bcc38d5e1fa6dc5b0068f0a8f612a33
