[INFO] fetching crate virtual-node 0.2.16...
[INFO] testing virtual-node-0.2.16 against 1.55.0 for beta-1.56-1
[INFO] extracting crate virtual-node 0.2.16 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate virtual-node 0.2.16 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate virtual-node 0.2.16
[INFO] finished tweaking crates.io crate virtual-node 0.2.16
[INFO] tweaked toml for crates.io crate virtual-node 0.2.16 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 59ba5e8d409decc8bf707a6d33c4d3df4e87f1c826c09f7005868076cb184e43
[INFO] running `Command { std: "docker" "start" "-a" "59ba5e8d409decc8bf707a6d33c4d3df4e87f1c826c09f7005868076cb184e43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "59ba5e8d409decc8bf707a6d33c4d3df4e87f1c826c09f7005868076cb184e43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59ba5e8d409decc8bf707a6d33c4d3df4e87f1c826c09f7005868076cb184e43", kill_on_drop: false }`
[INFO] [stdout] 59ba5e8d409decc8bf707a6d33c4d3df4e87f1c826c09f7005868076cb184e43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 849d802a493e815211f7d28eeb67d8fdbfa27e0950047ca7dec6a1ef7f86870d
[INFO] running `Command { std: "docker" "start" "-a" "849d802a493e815211f7d28eeb67d8fdbfa27e0950047ca7dec6a1ef7f86870d", kill_on_drop: false }`
[INFO] [stderr]    Compiling wasm-bindgen v0.2.77
[INFO] [stderr]    Compiling html-validation v0.1.2
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.77
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.77
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.77
[INFO] [stderr]    Compiling js-sys v0.3.54
[INFO] [stderr]    Compiling web-sys v0.3.54
[INFO] [stderr]    Compiling virtual-node v0.2.16 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.03s
[INFO] running `Command { std: "docker" "inspect" "849d802a493e815211f7d28eeb67d8fdbfa27e0950047ca7dec6a1ef7f86870d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "849d802a493e815211f7d28eeb67d8fdbfa27e0950047ca7dec6a1ef7f86870d", kill_on_drop: false }`
[INFO] [stdout] 849d802a493e815211f7d28eeb67d8fdbfa27e0950047ca7dec6a1ef7f86870d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9353f4786d2e97424955d8e4faa7f0c12821db62567244e4a043b7fb41be9e9c
[INFO] running `Command { std: "docker" "start" "-a" "9353f4786d2e97424955d8e4faa7f0c12821db62567244e4a043b7fb41be9e9c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling virtual-node v0.2.16 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> src/velement/attribute_value.rs:160:29
[INFO] [stdout]     |
[INFO] [stdout] 160 |         fn as_ref(&self) -> &'static str {
[INFO] [stdout]     |            ------           ^^^^^^^^^^^^ expected `&str`, found `()`
[INFO] [stdout]     |            |
[INFO] [stdout]     |            implicitly returns `()` as its body has no tail or `return` expression
[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 E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `virtual-node` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "9353f4786d2e97424955d8e4faa7f0c12821db62567244e4a043b7fb41be9e9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9353f4786d2e97424955d8e4faa7f0c12821db62567244e4a043b7fb41be9e9c", kill_on_drop: false }`
[INFO] [stdout] 9353f4786d2e97424955d8e4faa7f0c12821db62567244e4a043b7fb41be9e9c