[INFO] fetching crate genco-derive 0.5.0-alpha.5...
[INFO] checking genco-derive-0.5.0-alpha.5 against beta for pr-78714
[INFO] extracting crate genco-derive 0.5.0-alpha.5 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate genco-derive 0.5.0-alpha.5 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate genco-derive 0.5.0-alpha.5
[INFO] finished tweaking crates.io crate genco-derive 0.5.0-alpha.5
[INFO] tweaked toml for crates.io crate genco-derive 0.5.0-alpha.5 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "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" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5ac3e98678204625f41a489c2548f7be5188b3c8fedac432a872debf616dd5ab
[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" "5ac3e98678204625f41a489c2548f7be5188b3c8fedac432a872debf616dd5ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ac3e98678204625f41a489c2548f7be5188b3c8fedac432a872debf616dd5ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ac3e98678204625f41a489c2548f7be5188b3c8fedac432a872debf616dd5ab", kill_on_drop: false }`
[INFO] [stdout] 5ac3e98678204625f41a489c2548f7be5188b3c8fedac432a872debf616dd5ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c92e181359d2585de56c806d8f9028f0791af7999e19345476a3136baa8bd4e0
[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" "c92e181359d2585de56c806d8f9028f0791af7999e19345476a3136baa8bd4e0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]     Checking genco-derive v0.5.0-alpha.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling genco-derive v0.5.0-alpha.5
[INFO] [stderr]     Checking genco v0.5.0-alpha.5
[INFO] [stdout] error: proc macro panicked
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/genco-0.5.0-alpha.5/src/lang/java/mod.rs:442:22
[INFO] [stdout]     |
[INFO] [stdout] 442 |             out.push(quote!(import #(package)#(SEP)#(name);));
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: message: failed to join spans
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/genco-0.5.0-alpha.5/src/lib.rs:165:1
[INFO] [stdout]     |
[INFO] [stdout] 165 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `genco`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "c92e181359d2585de56c806d8f9028f0791af7999e19345476a3136baa8bd4e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c92e181359d2585de56c806d8f9028f0791af7999e19345476a3136baa8bd4e0", kill_on_drop: false }`
[INFO] [stdout] c92e181359d2585de56c806d8f9028f0791af7999e19345476a3136baa8bd4e0