[INFO] crate unhtml_derive 0.7.4 is already in cache
[INFO] checking unhtml_derive-0.7.4 against try#5e633973aa9255a88b65a39484627bb54e6044b3 for pr-66063
[INFO] extracting crate unhtml_derive 0.7.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate unhtml_derive 0.7.4 on toolchain 5e633973aa9255a88b65a39484627bb54e6044b3
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate unhtml_derive 0.7.4
[INFO] finished tweaking crates.io crate unhtml_derive 0.7.4
[INFO] tweaked toml for crates.io crate unhtml_derive 0.7.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+5e633973aa9255a88b65a39484627bb54e6044b3" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] cfbc9aed546db2b4495162925cc1d59dc136c1defbc9a746b68385f147deaae2
[INFO] running `"docker" "start" "-a" "cfbc9aed546db2b4495162925cc1d59dc136c1defbc9a746b68385f147deaae2"`
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]     Checking string_cache v0.7.5
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling cssparser v0.25.9
[INFO] [stderr]    Compiling html5ever v0.24.1
[INFO] [stderr]    Compiling cssparser-macros v0.3.6
[INFO] [stderr]     Checking selectors v0.21.0
[INFO] [stderr]    Compiling markup5ever v0.9.0
[INFO] [stderr]     Checking scraper v0.11.0
[INFO] [stderr]     Checking unhtml_derive v0.7.4 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro_diagnostic)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(proc_macro_diagnostic)]
[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 `unhtml_derive`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `unhtml_derive`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "cfbc9aed546db2b4495162925cc1d59dc136c1defbc9a746b68385f147deaae2"`
[INFO] running `"docker" "rm" "-f" "cfbc9aed546db2b4495162925cc1d59dc136c1defbc9a746b68385f147deaae2"`
[INFO] [stdout] cfbc9aed546db2b4495162925cc1d59dc136c1defbc9a746b68385f147deaae2