[INFO] fetching crate genserver 0.2.2...
[INFO] checking genserver-0.2.2 against 1.95.0 for pr-155915
[INFO] extracting crate genserver 0.2.2 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate genserver 0.2.2
[INFO] finished tweaking crates.io crate genserver 0.2.2
[INFO] tweaked toml for crates.io crate genserver 0.2.2 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate genserver 0.2.2 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 28 packages to latest compatible versions
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded genserver_codegen v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 94f143b5b87cc81411e51b9dfd5213a62677a3285b9f994576e20478b4611134
[INFO] running `Command { std: "docker" "start" "-a" "94f143b5b87cc81411e51b9dfd5213a62677a3285b9f994576e20478b4611134", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94f143b5b87cc81411e51b9dfd5213a62677a3285b9f994576e20478b4611134", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94f143b5b87cc81411e51b9dfd5213a62677a3285b9f994576e20478b4611134", kill_on_drop: false }`
[INFO] [stdout] 94f143b5b87cc81411e51b9dfd5213a62677a3285b9f994576e20478b4611134
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 0430720a9cb54363826c022464d9c6aa6827310e11f1ceab8ae2c9365c2d2dbd
[INFO] running `Command { std: "docker" "start" "-a" "0430720a9cb54363826c022464d9c6aa6827310e11f1ceab8ae2c9365c2d2dbd", kill_on_drop: false }`
[INFO] [stderr]     Checking errno v0.3.14
[INFO] [stderr]     Checking mio v1.2.0
[INFO] [stderr]     Checking socket2 v0.6.3
[INFO] [stderr]    Compiling tokio-macros v2.7.0
[INFO] [stderr]    Compiling genserver_codegen v0.2.2
[INFO] [stderr]     Checking signal-hook-registry v1.4.8
[INFO] [stderr]     Checking tokio v1.52.3
[INFO] [stderr]     Checking tokio-stream v0.1.18
[INFO] [stderr]     Checking genserver v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(impl_trait_in_assoc_type)]
[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 `genserver` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "0430720a9cb54363826c022464d9c6aa6827310e11f1ceab8ae2c9365c2d2dbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0430720a9cb54363826c022464d9c6aa6827310e11f1ceab8ae2c9365c2d2dbd", kill_on_drop: false }`
[INFO] [stdout] 0430720a9cb54363826c022464d9c6aa6827310e11f1ceab8ae2c9365c2d2dbd
