[INFO] fetching crate holly 0.5.3...
[INFO] checking holly-0.5.3 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate holly 0.5.3 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate holly 0.5.3
[INFO] finished tweaking crates.io crate holly 0.5.3
[INFO] tweaked toml for crates.io crate holly 0.5.3 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate holly 0.5.3 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 73 packages to latest compatible versions
[INFO] [stderr]       Adding bytes v0.4.12 (available: v1.10.1)
[INFO] [stderr]       Adding futures v0.1.31 (available: v0.3.31)
[INFO] [stderr]       Adding parking_lot v0.8.0 (available: v0.12.5)
[INFO] [stderr]       Adding tokio v0.1.22 (available: v1.48.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa2b474689c57192f4a7a54fff5a9284ce588fc68d4b46236a753f1898df55e7
[INFO] running `Command { std: "docker" "start" "-a" "aa2b474689c57192f4a7a54fff5a9284ce588fc68d4b46236a753f1898df55e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa2b474689c57192f4a7a54fff5a9284ce588fc68d4b46236a753f1898df55e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa2b474689c57192f4a7a54fff5a9284ce588fc68d4b46236a753f1898df55e7", kill_on_drop: false }`
[INFO] [stdout] aa2b474689c57192f4a7a54fff5a9284ce588fc68d4b46236a753f1898df55e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f67d9d8a6d1fb2a28564daa008ab910cb69d7603c0fc57e0b5a30b8edc43b248
[INFO] running `Command { std: "docker" "start" "-a" "f67d9d8a6d1fb2a28564daa008ab910cb69d7603c0fc57e0b5a30b8edc43b248", kill_on_drop: false }`
[INFO] [stderr]     Checking lock_api v0.2.0
[INFO] [stderr]    Compiling parking_lot_core v0.5.0
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]    Compiling parking_lot v0.8.0
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking tokio-io v0.1.13
[INFO] [stderr]     Checking tokio-threadpool v0.1.18
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking tokio-codec v0.1.2
[INFO] [stderr]     Checking tokio-reactor v0.1.12
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio-fs v0.1.7
[INFO] [stderr]     Checking tokio-uds v0.2.7
[INFO] [stderr]     Checking tokio-tcp v0.1.4
[INFO] [stderr]     Checking tokio-udp v0.1.6
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking holly v0.5.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/stream.rs:31:21
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub struct KillCord(oneshot::Sender<()>);
[INFO] [stdout]    |            -------- ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `KillCord` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `holly` (lib) due to 9 previous errors; 1 warning emitted
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/stream.rs:31:21
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub struct KillCord(oneshot::Sender<()>);
[INFO] [stdout]    |            -------- ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `KillCord` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<(Option<T>, Box<dyn futures::Stream<Error = Void, Item = T> + std::marker::Send>)>>, (Void, Box<dyn futures::Stream<Error = Void, Item = T> + std::marker::Send>)>
[INFO] [stdout]    --> src/fold.rs:146:44
[INFO] [stdout]     |
[INFO] [stdout] 146 |                 Some(ref mut set) => match set.poll() {
[INFO] [stdout]     |                                            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:157:65
[INFO] [stdout]     |
[INFO] [stdout] 157 |       fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error> {
[INFO] [stdout]     |  _________________________________________________________________^
[INFO] [stdout] 158 | |         if self.done {
[INFO] [stdout] 159 | |             return Ok(Async::Ready(None))
[INFO] [stdout] ...   |
[INFO] [stdout] 170 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:159:20
[INFO] [stdout]     |
[INFO] [stdout] 159 |             return Ok(Async::Ready(None))
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:161:9
[INFO] [stdout]     |
[INFO] [stdout] 161 | /         match self.stream.poll() {
[INFO] [stdout] 162 | |             Err(e) => Ok(Async::Ready(Some(Event::Error(self.id.clone(), e)))),
[INFO] [stdout] 163 | |             Ok(Async::NotReady) => Ok(Async::NotReady),
[INFO] [stdout] 164 | |             Ok(Async::Ready(None)) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 168 | |             Ok(Async::Ready(Some(x))) => Ok(Async::Ready(Some(Event::Item(self.id.clone(), x))))
[INFO] [stdout] 169 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:162:23
[INFO] [stdout]     |
[INFO] [stdout] 162 |             Err(e) => Ok(Async::Ready(Some(Event::Error(self.id.clone(), e)))),
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:163:36
[INFO] [stdout]     |
[INFO] [stdout] 163 |             Ok(Async::NotReady) => Ok(Async::NotReady),
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:164:39
[INFO] [stdout]     |
[INFO] [stdout] 164 |               Ok(Async::Ready(None)) => {
[INFO] [stdout]     |  _______________________________________^
[INFO] [stdout] 165 | |                 self.done = true;
[INFO] [stdout] 166 | |                 Ok(Async::Ready(Some(Event::End(self.id.clone()))))
[INFO] [stdout] 167 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:166:17
[INFO] [stdout]     |
[INFO] [stdout] 166 |                 Ok(Async::Ready(Some(Event::End(self.id.clone()))))
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:168:42
[INFO] [stdout]     |
[INFO] [stdout] 168 |             Ok(Async::Ready(Some(x))) => Ok(Async::Ready(Some(Event::Item(self.id.clone(), x))))
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<(Option<T>, Box<dyn futures::Stream<Error = Void, Item = T> + std::marker::Send>)>>, (Void, Box<dyn futures::Stream<Error = Void, Item = T> + std::marker::Send>)>
[INFO] [stdout]    --> src/fold.rs:146:44
[INFO] [stdout]     |
[INFO] [stdout] 146 |                 Some(ref mut set) => match set.poll() {
[INFO] [stdout]     |                                            ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:157:65
[INFO] [stdout]     |
[INFO] [stdout] 157 |       fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error> {
[INFO] [stdout]     |  _________________________________________________________________^
[INFO] [stdout] 158 | |         if self.done {
[INFO] [stdout] 159 | |             return Ok(Async::Ready(None))
[INFO] [stdout] ...   |
[INFO] [stdout] 170 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:159:20
[INFO] [stdout]     |
[INFO] [stdout] 159 |             return Ok(Async::Ready(None))
[INFO] [stdout]     |                    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:161:9
[INFO] [stdout]     |
[INFO] [stdout] 161 | /         match self.stream.poll() {
[INFO] [stdout] 162 | |             Err(e) => Ok(Async::Ready(Some(Event::Error(self.id.clone(), e)))),
[INFO] [stdout] 163 | |             Ok(Async::NotReady) => Ok(Async::NotReady),
[INFO] [stdout] 164 | |             Ok(Async::Ready(None)) => {
[INFO] [stdout] ...   |
[INFO] [stdout] 168 | |             Ok(Async::Ready(Some(x))) => Ok(Async::Ready(Some(Event::Item(self.id.clone(), x))))
[INFO] [stdout] 169 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:162:23
[INFO] [stdout]     |
[INFO] [stdout] 162 |             Err(e) => Ok(Async::Ready(Some(Event::Error(self.id.clone(), e)))),
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:163:36
[INFO] [stdout]     |
[INFO] [stdout] 163 |             Ok(Async::NotReady) => Ok(Async::NotReady),
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:164:39
[INFO] [stdout]     |
[INFO] [stdout] 164 |               Ok(Async::Ready(None)) => {
[INFO] [stdout]     |  _______________________________________^
[INFO] [stdout] 165 | |                 self.done = true;
[INFO] [stdout] 166 | |                 Ok(Async::Ready(Some(Event::End(self.id.clone()))))
[INFO] [stdout] 167 | |             }
[INFO] [stdout]     | |_____________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:166:17
[INFO] [stdout]     |
[INFO] [stdout] 166 |                 Ok(Async::Ready(Some(Event::End(self.id.clone()))))
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<futures::Async<Option<Event<I, <S as futures::Stream>::Item, <S as futures::Stream>::Error>>>, Void>
[INFO] [stdout]    --> src/stream.rs:168:42
[INFO] [stdout]     |
[INFO] [stdout] 168 |             Ok(Async::Ready(Some(x))) => Ok(Async::Ready(Some(Event::Item(self.id.clone(), x))))
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `holly` (lib test) due to 9 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "f67d9d8a6d1fb2a28564daa008ab910cb69d7603c0fc57e0b5a30b8edc43b248", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f67d9d8a6d1fb2a28564daa008ab910cb69d7603c0fc57e0b5a30b8edc43b248", kill_on_drop: false }`
[INFO] [stdout] f67d9d8a6d1fb2a28564daa008ab910cb69d7603c0fc57e0b5a30b8edc43b248