[INFO] fetching crate javawithrust 0.2.0...
[INFO] testing javawithrust-0.2.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate javawithrust 0.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate javawithrust 0.2.0
[INFO] finished tweaking crates.io crate javawithrust 0.2.0
[INFO] tweaked toml for crates.io crate javawithrust 0.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate javawithrust 0.2.0 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 46 packages to latest compatible versions
[INFO] [stderr]       Adding j4rs v0.13.0 (available: v0.22.0)
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded java-locator v0.1.9
[INFO] [stderr]   Downloaded javawithrust_macro v0.2.0
[INFO] [stderr]   Downloaded dirs v3.0.2
[INFO] [stderr]   Downloaded j4rs_derive v0.1.1
[INFO] [stderr]   Downloaded libloading v0.6.7
[INFO] [stderr]   Downloaded j4rs v0.13.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] f773ca3a78e8f7a335d6551466adcebcaac67bc293797be355cdf67fb56157d0
[INFO] running `Command { std: "docker" "start" "-a" "f773ca3a78e8f7a335d6551466adcebcaac67bc293797be355cdf67fb56157d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f773ca3a78e8f7a335d6551466adcebcaac67bc293797be355cdf67fb56157d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f773ca3a78e8f7a335d6551466adcebcaac67bc293797be355cdf67fb56157d0", kill_on_drop: false }`
[INFO] [stdout] f773ca3a78e8f7a335d6551466adcebcaac67bc293797be355cdf67fb56157d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] d4da803104e109699387b09961958bc979148faf921b95d9a32b1d6b689beadf
[INFO] running `Command { std: "docker" "start" "-a" "d4da803104e109699387b09961958bc979148faf921b95d9a32b1d6b689beadf", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.18.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling opaque-debug v0.3.1
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stderr]    Compiling cpufeatures v0.2.17
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling fs_extra v1.3.0
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling memchr v2.7.6
[INFO] [stderr]    Compiling libloading v0.6.7
[INFO] [stderr]    Compiling cesu8 v1.1.0
[INFO] [stderr]    Compiling jni-sys v0.3.0
[INFO] [stderr]    Compiling dirs-sys v0.3.7
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling j4rs_derive v0.1.1
[INFO] [stderr]    Compiling dirs v3.0.2
[INFO] [stderr]    Compiling java-locator v0.1.9
[INFO] [stderr]    Compiling digest v0.9.0
[INFO] [stderr]    Compiling block-buffer v0.9.0
[INFO] [stderr]    Compiling sha2 v0.9.9
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling j4rs v0.13.0
[INFO] [stderr]    Compiling javawithrust_macro v0.2.0
[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/javawithrust_macro-0.2.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_expand)]
[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 `javawithrust_macro` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "d4da803104e109699387b09961958bc979148faf921b95d9a32b1d6b689beadf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4da803104e109699387b09961958bc979148faf921b95d9a32b1d6b689beadf", kill_on_drop: false }`
[INFO] [stdout] d4da803104e109699387b09961958bc979148faf921b95d9a32b1d6b689beadf