[INFO] updating cached repository https://github.com/christiansakai/serde_playground
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 53975e8d10ec884fe91b2ab3d9d43c4a9354dec7
[INFO] checking christiansakai/serde_playground against try#38f08371587f97c145dedb2c055ac7b01bf1e788 for pr-65294
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristiansakai%2Fserde_playground" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/christiansakai/serde_playground on toolchain 38f08371587f97c145dedb2c055ac7b01bf1e788
[INFO] running `"/workspace/cargo-home/bin/cargo" "+38f08371587f97c145dedb2c055ac7b01bf1e788" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/christiansakai/serde_playground
[INFO] finished tweaking git repo https://github.com/christiansakai/serde_playground
[INFO] tweaked toml for git repo https://github.com/christiansakai/serde_playground written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/christiansakai/serde_playground already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+38f08371587f97c145dedb2c055ac7b01bf1e788" "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-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=forbid" "-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" "+38f08371587f97c145dedb2c055ac7b01bf1e788" "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] 3c6d5e91af393937ca6faeb5e38c144df9bdfbe65f8e97e3d64e772347bb5841
[INFO] running `"docker" "start" "-a" "3c6d5e91af393937ca6faeb5e38c144df9bdfbe65f8e97e3d64e772347bb5841"`
[INFO] [stderr]    Compiling decimal v2.0.4
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking ron v0.5.1
[INFO] [stderr] error[E0518]: attribute should be applied to function or closure
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ron-0.5.1/src/parse.rs:649:1
[INFO] [stderr]     |
[INFO] [stderr] 649 | / bitflags! {
[INFO] [stderr] 650 | |     pub struct Extensions: usize {
[INFO] [stderr] 651 | |         const UNWRAP_NEWTYPES = 0x1;
[INFO] [stderr] 652 | |         const IMPLICIT_SOME = 0x2;
[INFO] [stderr] 653 | |     }
[INFO] [stderr] 654 | | }
[INFO] [stderr]     | |_^ not a function or closure
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0518]: attribute should be applied to function or closure
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ron-0.5.1/src/parse.rs:649:1
[INFO] [stderr]     |
[INFO] [stderr] 649 | / bitflags! {
[INFO] [stderr] 650 | |     pub struct Extensions: usize {
[INFO] [stderr] 651 | |         const UNWRAP_NEWTYPES = 0x1;
[INFO] [stderr] 652 | |         const IMPLICIT_SOME = 0x2;
[INFO] [stderr] 653 | |     }
[INFO] [stderr] 654 | | }
[INFO] [stderr]     | |_^ not a function or closure
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error[E0518]: attribute should be applied to function or closure
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/ron-0.5.1/src/parse.rs:649:1
[INFO] [stderr]     |
[INFO] [stderr] 649 | / bitflags! {
[INFO] [stderr] 650 | |     pub struct Extensions: usize {
[INFO] [stderr] 651 | |         const UNWRAP_NEWTYPES = 0x1;
[INFO] [stderr] 652 | |         const IMPLICIT_SOME = 0x2;
[INFO] [stderr] 653 | |     }
[INFO] [stderr] 654 | | }
[INFO] [stderr]     | |_^ not a function or closure
[INFO] [stderr]     |
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0518`.
[INFO] [stderr] error: could not compile `ron`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3c6d5e91af393937ca6faeb5e38c144df9bdfbe65f8e97e3d64e772347bb5841"`
[INFO] running `"docker" "rm" "-f" "3c6d5e91af393937ca6faeb5e38c144df9bdfbe65f8e97e3d64e772347bb5841"`
[INFO] [stdout] 3c6d5e91af393937ca6faeb5e38c144df9bdfbe65f8e97e3d64e772347bb5841