[INFO] fetching crate overloadf_derive 0.1.7...
[INFO] testing overloadf_derive-0.1.7 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate overloadf_derive 0.1.7 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate overloadf_derive 0.1.7 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate overloadf_derive 0.1.7
[INFO] finished tweaking crates.io crate overloadf_derive 0.1.7
[INFO] tweaked toml for crates.io crate overloadf_derive 0.1.7 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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" "+beta-2021-08-01" "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-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac576b3d7558aa1bc2b2996b3981aaebfb88c35cc122d1f71a4b580c4e494199
[INFO] running `Command { std: "docker" "start" "-a" "ac576b3d7558aa1bc2b2996b3981aaebfb88c35cc122d1f71a4b580c4e494199", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac576b3d7558aa1bc2b2996b3981aaebfb88c35cc122d1f71a4b580c4e494199", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac576b3d7558aa1bc2b2996b3981aaebfb88c35cc122d1f71a4b580c4e494199", kill_on_drop: false }`
[INFO] [stdout] ac576b3d7558aa1bc2b2996b3981aaebfb88c35cc122d1f71a4b580c4e494199
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3ab53afa2a51627734c31a6c0e331b80e152fe825af7474addd67736307d6717
[INFO] running `Command { std: "docker" "start" "-a" "3ab53afa2a51627734c31a6c0e331b80e152fe825af7474addd67736307d6717", kill_on_drop: false }`
[INFO] [stderr]    Compiling overloadf_derive v0.1.7 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: could not find `export` in `syn`
[INFO] [stdout]    --> src/lib.rs:172:62
[INFO] [stdout]     |
[INFO] [stdout] 172 | fn get_output(ast: &syn::ReturnType, tp: &syn::Type) -> syn::export::TokenStream2 {
[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:332:11
[INFO] [stdout]     |
[INFO] [stdout] 332 | ) -> syn::export::TokenStream2 {
[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:427:11
[INFO] [stdout]     |
[INFO] [stdout] 427 | ) -> syn::export::TokenStream2 {
[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:541:11
[INFO] [stdout]     |
[INFO] [stdout] 541 | ) -> syn::export::TokenStream2 {
[INFO] [stdout]     |           ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_diagnostic, proc_macro_span)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `overloadf_derive` due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "3ab53afa2a51627734c31a6c0e331b80e152fe825af7474addd67736307d6717", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ab53afa2a51627734c31a6c0e331b80e152fe825af7474addd67736307d6717", kill_on_drop: false }`
[INFO] [stdout] 3ab53afa2a51627734c31a6c0e331b80e152fe825af7474addd67736307d6717
