[INFO] fetching crate rovv 0.2.1...
[INFO] testing rovv-0.2.1 against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] extracting crate rovv 0.2.1 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate rovv 0.2.1 on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rovv 0.2.1
[INFO] finished tweaking crates.io crate rovv 0.2.1
[INFO] tweaked toml for crates.io crate rovv 0.2.1 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded inwelling v0.3.0
[INFO] [stderr]   Downloaded trees v0.4.2
[INFO] [stderr]   Downloaded escape8259 v0.5.1
[INFO] [stderr]   Downloaded pals v0.1.2
[INFO] [stderr]   Downloaded cmdline_words_parser v0.2.1
[INFO] [stderr]   Downloaded lens-rs_derive v0.3.2
[INFO] [stderr]   Downloaded lens-rs v0.3.2
[INFO] [stderr]   Downloaded rovv_derive v0.2.0
[INFO] [stderr]   Downloaded lens-rs_generator v0.1.2
[INFO] [stderr]   Downloaded utf16_reader v0.1.0
[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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 991997a4e1d50ea1d6cbdbd1f9b71e0f207d3b122544338a76bc4a737f331021
[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" "991997a4e1d50ea1d6cbdbd1f9b71e0f207d3b122544338a76bc4a737f331021", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "991997a4e1d50ea1d6cbdbd1f9b71e0f207d3b122544338a76bc4a737f331021", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "991997a4e1d50ea1d6cbdbd1f9b71e0f207d3b122544338a76bc4a737f331021", kill_on_drop: false }`
[INFO] [stdout] 991997a4e1d50ea1d6cbdbd1f9b71e0f207d3b122544338a76bc4a737f331021
[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=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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bef2709bcbec07a5f6184eb4603870cb1cec034a7e93567f66572855bde8654b
[INFO] running `Command { std: "docker" "start" "-a" "bef2709bcbec07a5f6184eb4603870cb1cec034a7e93567f66572855bde8654b", kill_on_drop: false }`
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling anyhow v1.0.47
[INFO] [stderr]    Compiling serde_json v1.0.71
[INFO] [stderr]    Compiling cmdline_words_parser v0.2.1
[INFO] [stderr]    Compiling trees v0.4.2
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling escape8259 v0.5.1
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]    Compiling pals v0.1.2
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling rovv_derive v0.2.0
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling cargo-platform v0.1.2
[INFO] [stderr]    Compiling cargo_metadata v0.12.3
[INFO] [stderr]    Compiling inwelling v0.3.0
[INFO] [stderr]    Compiling lens-rs_generator v0.1.2
[INFO] [stderr]    Compiling rovv v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> build.rs:27:20
[INFO] [stdout]    |
[INFO] [stdout] 27 |             if let Some(syntax) = syn::parse_file(&contents) {
[INFO] [stdout]    |                    ^^^^^^^^^^^^   -------------------------- this expression has type `Result<syn::File, syn::Error>`
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    expected enum `Result`, found enum `Option`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected enum `Result<syn::File, syn::Error>`
[INFO] [stdout]               found enum `Option<_>`
[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 `rovv` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "bef2709bcbec07a5f6184eb4603870cb1cec034a7e93567f66572855bde8654b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bef2709bcbec07a5f6184eb4603870cb1cec034a7e93567f66572855bde8654b", kill_on_drop: false }`
[INFO] [stdout] bef2709bcbec07a5f6184eb4603870cb1cec034a7e93567f66572855bde8654b