[INFO] fetching crate yew_form_derive 0.1.7...
[INFO] testing yew_form_derive-0.1.7 against 1.55.0 for beta-1.56-1
[INFO] extracting crate yew_form_derive 0.1.7 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate yew_form_derive 0.1.7 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 yew_form_derive 0.1.7
[INFO] finished tweaking crates.io crate yew_form_derive 0.1.7
[INFO] tweaked toml for crates.io crate yew_form_derive 0.1.7 written to /workspace/builds/worker-0/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] 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8b8f5fb3be4279317bf36e26ff45ab37bafc1b72685e5d85a4113637eca9d66d
[INFO] running `Command { std: "docker" "start" "-a" "8b8f5fb3be4279317bf36e26ff45ab37bafc1b72685e5d85a4113637eca9d66d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b8f5fb3be4279317bf36e26ff45ab37bafc1b72685e5d85a4113637eca9d66d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b8f5fb3be4279317bf36e26ff45ab37bafc1b72685e5d85a4113637eca9d66d", kill_on_drop: false }`
[INFO] [stdout] 8b8f5fb3be4279317bf36e26ff45ab37bafc1b72685e5d85a4113637eca9d66d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7e24bc0a484f749172d381d3c3694320e20ddc2626a8954ee1f4c581162442a5
[INFO] running `Command { std: "docker" "start" "-a" "7e24bc0a484f749172d381d3c3694320e20ddc2626a8954ee1f4c581162442a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling yew v0.17.4
[INFO] [stderr]    Compiling if_chain v1.0.2
[INFO] [stderr]    Compiling yew-macro v0.17.0
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling validator v0.10.1
[INFO] [stderr]    Compiling validator_derive v0.10.1
[INFO] [stderr]    Compiling futures-executor v0.3.17
[INFO] [stderr]    Compiling futures v0.3.17
[INFO] [stderr]    Compiling yew_form v0.1.7
[INFO] [stderr]    Compiling yew_form_derive v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `syn::export`
[INFO] [stdout]  --> src/lib.rs:6:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | use syn::export::{ToTokens, TokenStream};
[INFO] [stdout]   |          ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `to_tokens` found for reference `&syn::Path` in the current scope
[INFO] [stdout]   --> src/lib.rs:32:22
[INFO] [stdout]    |
[INFO] [stdout] 32 |                 path.to_tokens(&mut tokens);
[INFO] [stdout]    |                      ^^^^^^^^^ method not found in `&syn::Path`
[INFO] [stdout]    |
[INFO] [stdout]    = help: items from traits can only be used if the trait is in scope
[INFO] [stdout] help: the following trait is implemented but not in scope; perhaps add a `use` for it:
[INFO] [stdout]    |
[INFO] [stdout] 6  | use crate::quote::ToTokens;
[INFO] [stdout]    |
[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, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `yew_form_derive` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "7e24bc0a484f749172d381d3c3694320e20ddc2626a8954ee1f4c581162442a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e24bc0a484f749172d381d3c3694320e20ddc2626a8954ee1f4c581162442a5", kill_on_drop: false }`
[INFO] [stdout] 7e24bc0a484f749172d381d3c3694320e20ddc2626a8954ee1f4c581162442a5