[INFO] fetching crate rust_observable 0.2.1... [INFO] checking rust_observable-0.2.1 against try#52ae2445414b2a196b318d85c2819995c6e5f1aa for pr-133397 [INFO] extracting crate rust_observable 0.2.1 into /workspace/builds/worker-4-tc2/source [INFO] validating manifest of crates.io crate rust_observable 0.2.1 on toolchain 52ae2445414b2a196b318d85c2819995c6e5f1aa [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52ae2445414b2a196b318d85c2819995c6e5f1aa" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate rust_observable 0.2.1 [INFO] finished tweaking crates.io crate rust_observable 0.2.1 [INFO] tweaked toml for crates.io crate rust_observable 0.2.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52ae2445414b2a196b318d85c2819995c6e5f1aa" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 5 packages to latest compatible versions [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+52ae2445414b2a196b318d85c2819995c6e5f1aa" "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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+52ae2445414b2a196b318d85c2819995c6e5f1aa" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] ac977e15c5f5b281cad1620ada73517da26a59b8eb67be64755db43656c7729e [INFO] running `Command { std: "docker" "start" "-a" "ac977e15c5f5b281cad1620ada73517da26a59b8eb67be64755db43656c7729e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "ac977e15c5f5b281cad1620ada73517da26a59b8eb67be64755db43656c7729e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ac977e15c5f5b281cad1620ada73517da26a59b8eb67be64755db43656c7729e", kill_on_drop: false }` [INFO] [stdout] ac977e15c5f5b281cad1620ada73517da26a59b8eb67be64755db43656c7729e [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" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+52ae2445414b2a196b318d85c2819995c6e5f1aa" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] db7db1f011f6d484f67b07df9d3b6d40f837dbe66991c019bf761e4f3ea74180 [INFO] running `Command { std: "docker" "start" "-a" "db7db1f011f6d484f67b07df9d3b6d40f837dbe66991c019bf761e4f3ea74180", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.92 [INFO] [stderr] Compiling unicode-ident v1.0.14 [INFO] [stderr] Compiling quote v1.0.37 [INFO] [stderr] Compiling syn v2.0.89 [INFO] [stderr] Compiling rust_observable_literal v0.1.0 [INFO] [stderr] Checking rust_observable v0.2.1 (/opt/rustwide/workdir) [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/lib.rs:251:58 [INFO] [stdout] | [INFO] [stdout] 251 | *this.cleanup.write().unwrap() = Some(Arc::clone(&cleanup)); [INFO] [stdout] | ---------- ^^^^^^^^ expected `&Arc`, found `&<... as FnOnce<...>>::Output` [INFO] [stdout] | | [INFO] [stdout] | arguments to this function are incorrect [INFO] [stdout] | [INFO] [stdout] = note: expected reference `&std::sync::Arc` [INFO] [stdout] found reference `&<(dyn Fn<(SubscriptionObserver,)> + Send + Sync + 'static) as FnOnce<(SubscriptionObserver,)>>::Output` [INFO] [stdout] = help: consider constraining the associated type `<(dyn Fn<(SubscriptionObserver,)> + Send + Sync + 'static) as FnOnce<(SubscriptionObserver,)>>::Output` to `std::sync::Arc` [INFO] [stdout] = note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html [INFO] [stdout] note: method defined here [INFO] [stdout] --> /rustc/52ae2445414b2a196b318d85c2819995c6e5f1aa/library/core/src/clone.rs:165:8 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0308]: mismatched types [INFO] [stdout] --> src/lib.rs:251:58 [INFO] [stdout] | [INFO] [stdout] 251 | *this.cleanup.write().unwrap() = Some(Arc::clone(&cleanup)); [INFO] [stdout] | ---------- ^^^^^^^^ expected `&Arc`, found `&<... as FnOnce<...>>::Output` [INFO] [stdout] | | [INFO] [stdout] | arguments to this function are incorrect [INFO] [stdout] | [INFO] [stdout] = note: expected reference `&Arc` [INFO] [stdout] found reference `&<(dyn Fn<(SubscriptionObserver,)> + Send + Sync + 'static) as FnOnce<(SubscriptionObserver,)>>::Output` [INFO] [stdout] = help: consider constraining the associated type `<(dyn Fn<(SubscriptionObserver,)> + Send + Sync + 'static) as FnOnce<(SubscriptionObserver,)>>::Output` to `Arc` [INFO] [stdout] = note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html [INFO] [stdout] note: method defined here [INFO] [stdout] --> /rustc/52ae2445414b2a196b318d85c2819995c6e5f1aa/library/core/src/clone.rs:165:8 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stderr] error: could not compile `rust_observable` (lib) due to 1 previous error [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] For more information about this error, try `rustc --explain E0308`. [INFO] [stdout] [INFO] [stderr] error: could not compile `rust_observable` (lib test) due to 1 previous error [INFO] running `Command { std: "docker" "inspect" "db7db1f011f6d484f67b07df9d3b6d40f837dbe66991c019bf761e4f3ea74180", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "db7db1f011f6d484f67b07df9d3b6d40f837dbe66991c019bf761e4f3ea74180", kill_on_drop: false }` [INFO] [stdout] db7db1f011f6d484f67b07df9d3b6d40f837dbe66991c019bf761e4f3ea74180