[INFO] crate pyportus 0.4.0 is already in cache
[INFO] checking pyportus-0.4.0 against try#8810c24b0958114d8dbb32d878444e8956fce80f for pr-66063
[INFO] extracting crate pyportus 0.4.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate pyportus 0.4.0 on toolchain 8810c24b0958114d8dbb32d878444e8956fce80f
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate pyportus 0.4.0
[INFO] finished tweaking crates.io crate pyportus 0.4.0
[INFO] tweaked toml for crates.io crate pyportus 0.4.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+8810c24b0958114d8dbb32d878444e8956fce80f" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 09392ae9ab3f3c2ac72b9f93cfcebbb99e43b9dee767b85dc2f8f9e909d589cc
[INFO] running `"docker" "start" "-a" "09392ae9ab3f3c2ac72b9f93cfcebbb99e43b9dee767b85dc2f8f9e909d589cc"`
[INFO] [stderr]     Checking spin v0.4.10
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking simple-signal v1.1.1
[INFO] [stderr]     Checking syn v0.13.11
[INFO] [stderr]     Checking slog-async v2.3.0
[INFO] [stderr]    Compiling pyo3 v0.2.7
[INFO] [stderr]     Checking slog-term v2.4.2
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/spin-0.4.10/src/lib.rs:6:35
[INFO] [stderr]   |
[INFO] [stderr] 6 | #![cfg_attr(feature = "const_fn", feature(const_fn))]
[INFO] [stderr]   |                                   ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `spin`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "09392ae9ab3f3c2ac72b9f93cfcebbb99e43b9dee767b85dc2f8f9e909d589cc"`
[INFO] running `"docker" "rm" "-f" "09392ae9ab3f3c2ac72b9f93cfcebbb99e43b9dee767b85dc2f8f9e909d589cc"`
[INFO] [stdout] 09392ae9ab3f3c2ac72b9f93cfcebbb99e43b9dee767b85dc2f8f9e909d589cc