[INFO] fetching crate genco-derive 0.5.0-alpha.5...
[INFO] checking genco-derive-0.5.0-alpha.5 against 1.95.0 for pr-155915
[INFO] extracting crate genco-derive 0.5.0-alpha.5 into /workspace/builds/worker-3-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-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate genco-derive 0.5.0-alpha.5 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "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" "+1.95.0" "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: v2.0.117)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded genco v0.5.0-alpha.5
[INFO] [stderr]   Downloaded genco-derive v0.5.0-alpha.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e447bfb7484bd9364b07bf2d8e6d2d8bd58be9ef5b4d6d5cf1dfcc74d67937d
[INFO] running `Command { std: "docker" "start" "-a" "1e447bfb7484bd9364b07bf2d8e6d2d8bd58be9ef5b4d6d5cf1dfcc74d67937d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e447bfb7484bd9364b07bf2d8e6d2d8bd58be9ef5b4d6d5cf1dfcc74d67937d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e447bfb7484bd9364b07bf2d8e6d2d8bd58be9ef5b4d6d5cf1dfcc74d67937d", kill_on_drop: false }`
[INFO] [stdout] 1e447bfb7484bd9364b07bf2d8e6d2d8bd58be9ef5b4d6d5cf1dfcc74d67937d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 27f392622284ea36134a00ff0a5bf32cd22ced272c47fe396a24762948d242a1
[INFO] running `Command { std: "docker" "start" "-a" "27f392622284ea36134a00ff0a5bf32cd22ced272c47fe396a24762948d242a1", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking unicode-ident v1.0.24
[INFO] [stderr]     Checking proc-macro2 v1.0.106
[INFO] [stderr]     Checking quote v1.0.45
[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/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" "27f392622284ea36134a00ff0a5bf32cd22ced272c47fe396a24762948d242a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "27f392622284ea36134a00ff0a5bf32cd22ced272c47fe396a24762948d242a1", kill_on_drop: false }`
[INFO] [stdout] 27f392622284ea36134a00ff0a5bf32cd22ced272c47fe396a24762948d242a1