[INFO] fetching crate label-macros 0.6.0...
[INFO] testing label-macros-0.6.0 against 1.59.0 for beta-1.60-1
[INFO] extracting crate label-macros 0.6.0 into /workspace/builds/worker-44/source
[INFO] validating manifest of crates.io crate label-macros 0.6.0 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 label-macros 0.6.0
[INFO] finished tweaking crates.io crate label-macros 0.6.0
[INFO] tweaked toml for crates.io crate label-macros 0.6.0 written to /workspace/builds/worker-44/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] 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-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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] 315f60f6cf66adaf65d8c5cf22cebdc02f7c964a9b05713b3494375b7593eb5d
[INFO] running `Command { std: "docker" "start" "-a" "315f60f6cf66adaf65d8c5cf22cebdc02f7c964a9b05713b3494375b7593eb5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "315f60f6cf66adaf65d8c5cf22cebdc02f7c964a9b05713b3494375b7593eb5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "315f60f6cf66adaf65d8c5cf22cebdc02f7c964a9b05713b3494375b7593eb5d", kill_on_drop: false }`
[INFO] [stdout] 315f60f6cf66adaf65d8c5cf22cebdc02f7c964a9b05713b3494375b7593eb5d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-44/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] 64c9c1f07363b9134fee96da2f8b6f6926e4f1c83334f07d51feff952f7e6f29
[INFO] running `Command { std: "docker" "start" "-a" "64c9c1f07363b9134fee96da2f8b6f6926e4f1c83334f07d51feff952f7e6f29", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]    Compiling label-macros v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `syn::export`
[INFO] [stdout]   --> src/lib.rs:14:10
[INFO] [stdout]    |
[INFO] [stdout] 14 | use syn::export::ToTokens;
[INFO] [stdout]    |          ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]   --> src/lib.rs:78:43
[INFO] [stdout]    |
[INFO] [stdout] 78 |     fn to_tokens(&self, tokens: &mut syn::export::TokenStream2) {
[INFO] [stdout]    |                                           ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `label-macros` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "64c9c1f07363b9134fee96da2f8b6f6926e4f1c83334f07d51feff952f7e6f29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64c9c1f07363b9134fee96da2f8b6f6926e4f1c83334f07d51feff952f7e6f29", kill_on_drop: false }`
[INFO] [stdout] 64c9c1f07363b9134fee96da2f8b6f6926e4f1c83334f07d51feff952f7e6f29