[INFO] fetching crate rclist 0.0.1...
[INFO] testing rclist-0.0.1 against 1.60.0 for beta-1.61-1
[INFO] extracting crate rclist 0.0.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate rclist 0.0.1 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rclist 0.0.1
[INFO] finished tweaking crates.io crate rclist 0.0.1
[INFO] tweaked toml for crates.io crate rclist 0.0.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c79b57b79841519c8c851f1d7e735262c06ac69d7d7a45f0931515d9601adbef
[INFO] running `Command { std: "docker" "start" "-a" "c79b57b79841519c8c851f1d7e735262c06ac69d7d7a45f0931515d9601adbef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c79b57b79841519c8c851f1d7e735262c06ac69d7d7a45f0931515d9601adbef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c79b57b79841519c8c851f1d7e735262c06ac69d7d7a45f0931515d9601adbef", kill_on_drop: false }`
[INFO] [stdout] c79b57b79841519c8c851f1d7e735262c06ac69d7d7a45f0931515d9601adbef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 034dc45c09576782bdfc63c1f709b8ba95e6d74d395f2d64193069b873ed7c37
[INFO] running `Command { std: "docker" "start" "-a" "034dc45c09576782bdfc63c1f709b8ba95e6d74d395f2d64193069b873ed7c37", kill_on_drop: false }`
[INFO] [stderr]    Compiling rclist v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `downgrade` found for reference `&Rc<T>` in the current scope
[INFO] [stdout]   --> src/lib.rs:31:50
[INFO] [stdout]    |
[INFO] [stdout] 31 |             &Link::Strong(ref x) => Link::Weak(x.downgrade()),
[INFO] [stdout]    |                                                --^^^^^^^^^
[INFO] [stdout]    |                                                | |
[INFO] [stdout]    |                                                | this is an associated function, not a method
[INFO] [stdout]    |                                                help: use associated function syntax instead: `Rc::<T>::downgrade`
[INFO] [stdout]    |
[INFO] [stdout]    = note: found the following associated functions; to be used as methods, functions must have a `self` parameter
[INFO] [stdout]    = note: the candidate is defined in an impl for the type `Rc<T>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rclist` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "034dc45c09576782bdfc63c1f709b8ba95e6d74d395f2d64193069b873ed7c37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "034dc45c09576782bdfc63c1f709b8ba95e6d74d395f2d64193069b873ed7c37", kill_on_drop: false }`
[INFO] [stdout] 034dc45c09576782bdfc63c1f709b8ba95e6d74d395f2d64193069b873ed7c37