[INFO] fetching crate memdb 1.0.0... [INFO] testing memdb-1.0.0 against 1.59.0 for beta-1.60-1 [INFO] extracting crate memdb 1.0.0 into /workspace/builds/worker-7/source [INFO] validating manifest of crates.io crate memdb 1.0.0 on toolchain 1.59.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate memdb 1.0.0 [INFO] finished tweaking crates.io crate memdb 1.0.0 [INFO] tweaked toml for crates.io crate memdb 1.0.0 written to /workspace/builds/worker-7/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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" "+1.59.0" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 316b8f21fb9f4907e050088cd4e618e67de8c2310887b158c87bf49cf6af42a7 [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" "316b8f21fb9f4907e050088cd4e618e67de8c2310887b158c87bf49cf6af42a7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "316b8f21fb9f4907e050088cd4e618e67de8c2310887b158c87bf49cf6af42a7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "316b8f21fb9f4907e050088cd4e618e67de8c2310887b158c87bf49cf6af42a7", kill_on_drop: false }` [INFO] [stdout] 316b8f21fb9f4907e050088cd4e618e67de8c2310887b158c87bf49cf6af42a7 [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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f20d9ea75ebfb8cffd875ce5c6d4a8fc45dbfaf258b2307cf0052ef6befa59a4 [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" "f20d9ea75ebfb8cffd875ce5c6d4a8fc45dbfaf258b2307cf0052ef6befa59a4", kill_on_drop: false }` [INFO] [stderr] Compiling owning_ref v0.4.1 [INFO] [stderr] Compiling parking_lot_core v0.3.1 [INFO] [stderr] Compiling lock_api v0.1.5 [INFO] [stderr] Compiling parking_lot v0.6.4 [INFO] [stderr] Compiling memdb v1.0.0 (/opt/rustwide/workdir) [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/lib.rs:1:1 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(async_await)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute [INFO] [stdout] | [INFO] [stdout] = help: the feature `async_await` has been stable since 1.39.0 and no longer requires an attribute to enable [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: `must_use` attribute on `async` functions applies to the anonymous `Future` returned by the function, not the value within [INFO] [stdout] --> src/lib.rs:54:5 [INFO] [stdout] | [INFO] [stdout] 54 | #[must_use] [INFO] [stdout] | ^^^^^^^^^^^ [INFO] [stdout] 55 | #[inline] [INFO] [stdout] 56 | / pub async fn get(&self, key: impl AsRef<[u8]>) -> io::Result>> { [INFO] [stdout] 57 | | let key = key.as_ref().to_owned(); [INFO] [stdout] 58 | | let hashmap = &self.hashmap.read(); [INFO] [stdout] 59 | | Ok(hashmap.get(&key).cloned()) [INFO] [stdout] 60 | | } [INFO] [stdout] | |_____- this attribute does nothing, the `Future`s returned by async functions are already `must_use` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_attributes)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0554`. [INFO] [stdout] [INFO] [stderr] error: could not compile `memdb` due to 2 previous errors; 1 warning emitted [INFO] running `Command { std: "docker" "inspect" "f20d9ea75ebfb8cffd875ce5c6d4a8fc45dbfaf258b2307cf0052ef6befa59a4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f20d9ea75ebfb8cffd875ce5c6d4a8fc45dbfaf258b2307cf0052ef6befa59a4", kill_on_drop: false }` [INFO] [stdout] f20d9ea75ebfb8cffd875ce5c6d4a8fc45dbfaf258b2307cf0052ef6befa59a4