[INFO] fetching crate scratchstack-aspen 0.1.0...
[INFO] testing scratchstack-aspen-0.1.0 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate scratchstack-aspen 0.1.0 into /workspace/builds/worker-112/source
[INFO] validating manifest of crates.io crate scratchstack-aspen 0.1.0 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate scratchstack-aspen 0.1.0
[INFO] finished tweaking crates.io crate scratchstack-aspen 0.1.0
[INFO] tweaked toml for crates.io crate scratchstack-aspen 0.1.0 written to /workspace/builds/worker-112/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-112/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-112/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 468152e0e4939505197b9cdbf00624c38ed81421081c6cdcc1ff7f8d7f37a3c0
[INFO] running `Command { std: "docker" "start" "-a" "468152e0e4939505197b9cdbf00624c38ed81421081c6cdcc1ff7f8d7f37a3c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "468152e0e4939505197b9cdbf00624c38ed81421081c6cdcc1ff7f8d7f37a3c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "468152e0e4939505197b9cdbf00624c38ed81421081c6cdcc1ff7f8d7f37a3c0", kill_on_drop: false }`
[INFO] [stdout] 468152e0e4939505197b9cdbf00624c38ed81421081c6cdcc1ff7f8d7f37a3c0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-112/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-112/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e91f4c431069ced37554a53a3443756b9e4088242a7d3550a8b8b3d6d1f1b6fc
[INFO] running `Command { std: "docker" "start" "-a" "e91f4c431069ced37554a53a3443756b9e4088242a7d3550a8b8b3d6d1f1b6fc", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling scratchstack-aws-principal v0.3.1
[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/scratchstack-aws-principal-0.3.1/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(doc_cfg)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `scratchstack-aws-principal` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e91f4c431069ced37554a53a3443756b9e4088242a7d3550a8b8b3d6d1f1b6fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e91f4c431069ced37554a53a3443756b9e4088242a7d3550a8b8b3d6d1f1b6fc", kill_on_drop: false }`
[INFO] [stdout] e91f4c431069ced37554a53a3443756b9e4088242a7d3550a8b8b3d6d1f1b6fc