[INFO] fetching crate genco-derive 0.5.0-alpha.5...
[INFO] testing genco-derive-0.5.0-alpha.5 against 1.90.0 for beta-1.91-3
[INFO] extracting crate genco-derive 0.5.0-alpha.5 into /workspace/builds/worker-4-tc1/source
[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-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate genco-derive 0.5.0-alpha.5 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] [stderr]       Adding genco v0.5.0-alpha.5 (available: v0.5.0)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.106)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded genco-derive v0.5.0-alpha.5
[INFO] [stderr]   Downloaded genco v0.5.0-alpha.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d102f18a613eb76f0cb60b72809646b6866d71f18db79d6ba6dc371dd93976ce
[INFO] running `Command { std: "docker" "start" "-a" "d102f18a613eb76f0cb60b72809646b6866d71f18db79d6ba6dc371dd93976ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d102f18a613eb76f0cb60b72809646b6866d71f18db79d6ba6dc371dd93976ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d102f18a613eb76f0cb60b72809646b6866d71f18db79d6ba6dc371dd93976ce", kill_on_drop: false }`
[INFO] [stdout] d102f18a613eb76f0cb60b72809646b6866d71f18db79d6ba6dc371dd93976ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 115d0095ec22da02f3263df8853e0c9b0758cb245f0000a6b7a8b44fcedfd3ac
[INFO] running `Command { std: "docker" "start" "-a" "115d0095ec22da02f3263df8853e0c9b0758cb245f0000a6b7a8b44fcedfd3ac", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling genco-derive v0.5.0-alpha.5 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.28s
[INFO] running `Command { std: "docker" "inspect" "115d0095ec22da02f3263df8853e0c9b0758cb245f0000a6b7a8b44fcedfd3ac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "115d0095ec22da02f3263df8853e0c9b0758cb245f0000a6b7a8b44fcedfd3ac", kill_on_drop: false }`
[INFO] [stdout] 115d0095ec22da02f3263df8853e0c9b0758cb245f0000a6b7a8b44fcedfd3ac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3bf9d2df37f4c912f2815dc9e07bebfe839c6d059265c79ef0f70586555c77f7
[INFO] running `Command { std: "docker" "start" "-a" "3bf9d2df37f4c912f2815dc9e07bebfe839c6d059265c79ef0f70586555c77f7", kill_on_drop: false }`
[INFO] [stderr]    Compiling genco-derive v0.5.0-alpha.5
[INFO] [stderr]    Compiling genco-derive v0.5.0-alpha.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling genco v0.5.0-alpha.5
[INFO] [stdout] error: proc macro panicked
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/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 stable release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/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] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `genco` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "3bf9d2df37f4c912f2815dc9e07bebfe839c6d059265c79ef0f70586555c77f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bf9d2df37f4c912f2815dc9e07bebfe839c6d059265c79ef0f70586555c77f7", kill_on_drop: false }`
[INFO] [stdout] 3bf9d2df37f4c912f2815dc9e07bebfe839c6d059265c79ef0f70586555c77f7