[INFO] fetching crate ergol_proc_macro 0.0.1...
[INFO] checking ergol_proc_macro-0.0.1 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate ergol_proc_macro 0.0.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate ergol_proc_macro 0.0.1 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ergol_proc_macro 0.0.1
[INFO] finished tweaking crates.io crate ergol_proc_macro 0.0.1
[INFO] tweaked toml for crates.io crate ergol_proc_macro 0.0.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3e2ae29cd419d34d422d9b770aa60ad4d72435c93b66186883601e89f7c761c5
[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" "3e2ae29cd419d34d422d9b770aa60ad4d72435c93b66186883601e89f7c761c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3e2ae29cd419d34d422d9b770aa60ad4d72435c93b66186883601e89f7c761c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e2ae29cd419d34d422d9b770aa60ad4d72435c93b66186883601e89f7c761c5", kill_on_drop: false }`
[INFO] [stdout] 3e2ae29cd419d34d422d9b770aa60ad4d72435c93b66186883601e89f7c761c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee2a6783218d2cc4e0999147828a96e6581a408e661a0fc2c4c748828da208ee
[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" "ee2a6783218d2cc4e0999147828a96e6581a408e661a0fc2c4c748828da208ee", kill_on_drop: false }`
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]     Checking case v1.0.0
[INFO] [stderr]     Checking proc-macro2 v1.0.26
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking syn v1.0.72
[INFO] [stderr]     Checking ergol_proc_macro v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `syn::export`
[INFO] [stdout]  --> src/ergol.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use syn::export::TokenStream2;
[INFO] [stdout]   |          ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `syn::export`
[INFO] [stdout]  --> src/pgenum.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use syn::export::TokenStream2;
[INFO] [stdout]   |          ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `syn::export`
[INFO] [stdout]  --> src/ergol.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use syn::export::TokenStream2;
[INFO] [stdout]   |          ^^^^^^ could not find `export` in `syn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `syn::export`
[INFO] [stdout]  --> src/pgenum.rs:3:10
[INFO] [stdout]   |
[INFO] [stdout] 3 | use 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] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ergol_proc_macro`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ee2a6783218d2cc4e0999147828a96e6581a408e661a0fc2c4c748828da208ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee2a6783218d2cc4e0999147828a96e6581a408e661a0fc2c4c748828da208ee", kill_on_drop: false }`
[INFO] [stdout] ee2a6783218d2cc4e0999147828a96e6581a408e661a0fc2c4c748828da208ee