[INFO] fetching crate futures-promises 0.1.11... [INFO] checking futures-promises-0.1.11 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577 [INFO] extracting crate futures-promises 0.1.11 into /workspace/builds/worker-4-tc2/source [INFO] started tweaking crates.io crate futures-promises 0.1.11 [INFO] finished tweaking crates.io crate futures-promises 0.1.11 [INFO] tweaked toml for crates.io crate futures-promises 0.1.11 written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate futures-promises 0.1.11 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] Updating crates.io index [INFO] [stderr] Locking 1 package to latest compatible version [INFO] [stderr] Adding futures v0.1.31 (available: v0.3.31) [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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] c568c89909adcb99b32f106293dc102ca6ffc5a81b4a5d18716f1c458e724aaf [INFO] running `Command { std: "docker" "start" "-a" "c568c89909adcb99b32f106293dc102ca6ffc5a81b4a5d18716f1c458e724aaf", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c568c89909adcb99b32f106293dc102ca6ffc5a81b4a5d18716f1c458e724aaf", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c568c89909adcb99b32f106293dc102ca6ffc5a81b4a5d18716f1c458e724aaf", kill_on_drop: false }` [INFO] [stdout] c568c89909adcb99b32f106293dc102ca6ffc5a81b4a5d18716f1c458e724aaf [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 98751dd8fde6190eae93f1badf82cbc78b88ceef72866262115eba961415b129 [INFO] running `Command { std: "docker" "start" "-a" "98751dd8fde6190eae93f1badf82cbc78b88ceef72866262115eba961415b129", kill_on_drop: false }` [INFO] [stderr] Checking futures-promises v0.1.11 (/opt/rustwide/workdir) [INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression [INFO] [stdout] --> src/lib.rs:55:19 [INFO] [stdout] | [INFO] [stdout] 55 | match (&mut guard.1) { [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 55 - match (&mut guard.1) { [INFO] [stdout] 55 + match &mut guard.1 { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unnecessary parentheses around `match` scrutinee expression [INFO] [stdout] --> src/lib.rs:55:19 [INFO] [stdout] | [INFO] [stdout] 55 | match (&mut guard.1) { [INFO] [stdout] | ^ ^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: remove these parentheses [INFO] [stdout] | [INFO] [stdout] 55 - match (&mut guard.1) { [INFO] [stdout] 55 + match &mut guard.1 { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>>>, Infallible> [INFO] [stdout] --> src/lib.rs:52:93 [INFO] [stdout] | [INFO] [stdout] 52 | fn poll(&mut self) -> Poll::Item>, ::Error> { [INFO] [stdout] | _____________________________________________________________________________________________^ [INFO] [stdout] 53 | | self.task.register(); [INFO] [stdout] 54 | | let mut guard = self.content.lock().unwrap(); [INFO] [stdout] 55 | | match (&mut guard.1) { [INFO] [stdout] ... | [INFO] [stdout] 66 | | } [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>>>, Infallible> [INFO] [stdout] --> src/lib.rs:52:93 [INFO] [stdout] | [INFO] [stdout] 52 | fn poll(&mut self) -> Poll::Item>, ::Error> { [INFO] [stdout] | _____________________________________________________________________________________________^ [INFO] [stdout] 53 | | self.task.register(); [INFO] [stdout] 54 | | let mut guard = self.content.lock().unwrap(); [INFO] [stdout] 55 | | match (&mut guard.1) { [INFO] [stdout] ... | [INFO] [stdout] 66 | | } [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>>>, Infallible> [INFO] [stdout] --> src/lib.rs:55:13 [INFO] [stdout] | [INFO] [stdout] 55 | / match (&mut guard.1) { [INFO] [stdout] 56 | | StreamState::NotReady => Ok(Async::NotReady), [INFO] [stdout] 57 | | StreamState::Closed => Ok(Async::Ready(None)), [INFO] [stdout] 58 | | StreamState::Ready(count) => { [INFO] [stdout] ... | [INFO] [stdout] 65 | | } [INFO] [stdout] | |_____________^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>>>, Infallible> [INFO] [stdout] --> src/lib.rs:56:42 [INFO] [stdout] | [INFO] [stdout] 56 | StreamState::NotReady => Ok(Async::NotReady), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>>>, Infallible> [INFO] [stdout] --> src/lib.rs:57:40 [INFO] [stdout] | [INFO] [stdout] 57 | StreamState::Closed => Ok(Async::Ready(None)), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>>>, Infallible> [INFO] [stdout] --> src/lib.rs:58:46 [INFO] [stdout] | [INFO] [stdout] 58 | StreamState::Ready(count) => { [INFO] [stdout] | ______________________________________________^ [INFO] [stdout] 59 | | *count -= 1; [INFO] [stdout] 60 | | if *count <= 0 { [INFO] [stdout] 61 | | (*guard).1 = StreamState::NotReady; [INFO] [stdout] 62 | | } [INFO] [stdout] 63 | | Ok(Async::Ready(Some(self.content.clone()))) [INFO] [stdout] 64 | | } [INFO] [stdout] | |_________________^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>>>, Infallible> [INFO] [stdout] --> src/lib.rs:63:21 [INFO] [stdout] | [INFO] [stdout] 63 | Ok(Async::Ready(Some(self.content.clone()))) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/lib.rs:108:21 [INFO] [stdout] | [INFO] [stdout] 108 | pub fn lock(&self) -> WatchedVariableAccessor { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 108 | pub fn lock(&self) -> WatchedVariableAccessor<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>>>, Infallible> [INFO] [stdout] --> src/lib.rs:55:13 [INFO] [stdout] | [INFO] [stdout] 55 | / match (&mut guard.1) { [INFO] [stdout] 56 | | StreamState::NotReady => Ok(Async::NotReady), [INFO] [stdout] 57 | | StreamState::Closed => Ok(Async::Ready(None)), [INFO] [stdout] 58 | | StreamState::Ready(count) => { [INFO] [stdout] ... | [INFO] [stdout] 65 | | } [INFO] [stdout] | |_____________^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>>>, Infallible> [INFO] [stdout] --> src/lib.rs:56:42 [INFO] [stdout] | [INFO] [stdout] 56 | StreamState::NotReady => Ok(Async::NotReady), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>>>, Infallible> [INFO] [stdout] --> src/lib.rs:57:40 [INFO] [stdout] | [INFO] [stdout] 57 | StreamState::Closed => Ok(Async::Ready(None)), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>>>, Infallible> [INFO] [stdout] --> src/lib.rs:58:46 [INFO] [stdout] | [INFO] [stdout] 58 | StreamState::Ready(count) => { [INFO] [stdout] | ______________________________________________^ [INFO] [stdout] 59 | | *count -= 1; [INFO] [stdout] 60 | | if *count <= 0 { [INFO] [stdout] 61 | | (*guard).1 = StreamState::NotReady; [INFO] [stdout] 62 | | } [INFO] [stdout] 63 | | Ok(Async::Ready(Some(self.content.clone()))) [INFO] [stdout] 64 | | } [INFO] [stdout] | |_________________^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: this type will no longer be must used: Result>>>, Infallible> [INFO] [stdout] --> src/lib.rs:63:21 [INFO] [stdout] | [INFO] [stdout] 63 | Ok(Async::Ready(Some(self.content.clone()))) [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing [INFO] [stdout] --> src/lib.rs:108:21 [INFO] [stdout] | [INFO] [stdout] 108 | pub fn lock(&self) -> WatchedVariableAccessor { [INFO] [stdout] | ^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here [INFO] [stdout] | | [INFO] [stdout] | the lifetime is elided here [INFO] [stdout] | [INFO] [stdout] = help: the same lifetime is referred to in inconsistent ways, making the signature confusing [INFO] [stdout] = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default [INFO] [stdout] help: use `'_` for type paths [INFO] [stdout] | [INFO] [stdout] 108 | pub fn lock(&self) -> WatchedVariableAccessor<'_, T> { [INFO] [stdout] | +++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `futures-promises` (lib) due to 6 previous errors; 2 warnings emitted [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: could not compile `futures-promises` (lib test) due to 6 previous errors; 2 warnings emitted [INFO] running `Command { std: "docker" "inspect" "98751dd8fde6190eae93f1badf82cbc78b88ceef72866262115eba961415b129", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "98751dd8fde6190eae93f1badf82cbc78b88ceef72866262115eba961415b129", kill_on_drop: false }` [INFO] [stdout] 98751dd8fde6190eae93f1badf82cbc78b88ceef72866262115eba961415b129