[INFO] crate djinn 0.0.1 is already in cache
[INFO] checking djinn-0.0.1 against try#5e633973aa9255a88b65a39484627bb54e6044b3 for pr-66063
[INFO] extracting crate djinn 0.0.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate djinn 0.0.1 on toolchain 5e633973aa9255a88b65a39484627bb54e6044b3
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate djinn 0.0.1
[INFO] finished tweaking crates.io crate djinn 0.0.1
[INFO] tweaked toml for crates.io crate djinn 0.0.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+5e633973aa9255a88b65a39484627bb54e6044b3" "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] 7a62ea227ba761f11f7838dc27202bbf57ee0f4cdf9e2538e979286bdba72189
[INFO] running `"docker" "start" "-a" "7a62ea227ba761f11f7838dc27202bbf57ee0f4cdf9e2538e979286bdba72189"`
[INFO] [stderr]     Checking sha1 v0.2.0
[INFO] [stderr]    Compiling redis v0.8.0
[INFO] [stderr]    Compiling cpython v0.1.0
[INFO] [stderr]    Compiling ws2_32-sys v0.2.1
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking rmp v0.8.8
[INFO] [stderr]     Checking uuid v0.2.3
[INFO] [stderr]    Compiling python3-sys v0.1.3
[INFO] [stderr]     Checking rmp-serialize v0.8.1
[INFO] [stderr]     Checking miow v0.1.5
[INFO] [stderr]     Checking redis-cluster v0.1.4
[INFO] [stderr]     Checking mio v0.5.1
[INFO] [stderr]     Checking ws v0.5.3
[INFO] [stderr]     Checking djinn v0.0.1 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> examples/python.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(box_syntax)]
[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 `djinn`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "7a62ea227ba761f11f7838dc27202bbf57ee0f4cdf9e2538e979286bdba72189"`
[INFO] running `"docker" "rm" "-f" "7a62ea227ba761f11f7838dc27202bbf57ee0f4cdf9e2538e979286bdba72189"`
[INFO] [stdout] 7a62ea227ba761f11f7838dc27202bbf57ee0f4cdf9e2538e979286bdba72189