[INFO] crate ocf 0.2.0-alpha.6 is already in cache
[INFO] checking ocf-0.2.0-alpha.6 against master#2da942f32802c8233a09744024dfbc34431adf65 for pr-66963
[INFO] extracting crate ocf 0.2.0-alpha.6 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate ocf 0.2.0-alpha.6 on toolchain 2da942f32802c8233a09744024dfbc34431adf65
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate ocf 0.2.0-alpha.6
[INFO] finished tweaking crates.io crate ocf 0.2.0-alpha.6
[INFO] tweaked toml for crates.io crate ocf 0.2.0-alpha.6 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2da942f32802c8233a09744024dfbc34431adf65" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+2da942f32802c8233a09744024dfbc34431adf65" "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] 873c76f34ba7541952faf3480ebc76fb0cedb263784578f6ec38ea0c7b9ee0b4
[INFO] running `"docker" "start" "-a" "873c76f34ba7541952faf3480ebc76fb0cedb263784578f6ec38ea0c7b9ee0b4"`
[INFO] [stderr]    Compiling ocf v0.2.0-alpha.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking nom v1.2.4
[INFO] [stderr]     Checking ordered-float v0.0.2
[INFO] [stderr]     Checking serde-value v0.1.0
[INFO] [stderr]     Checking semver v0.2.3
[INFO] [stderr] error: cannot find macro `error_expected_unstable_or_stable_feature` in this scope
[INFO] [stderr]   --> src/mod.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | error_expected_unstable_or_stable_feature!();
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `ocf`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: cannot find macro `error_expected_unstable_or_stable_feature` in this scope
[INFO] [stderr]   --> src/mod.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | error_expected_unstable_or_stable_feature!();
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `ocf`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "873c76f34ba7541952faf3480ebc76fb0cedb263784578f6ec38ea0c7b9ee0b4"`
[INFO] running `"docker" "rm" "-f" "873c76f34ba7541952faf3480ebc76fb0cedb263784578f6ec38ea0c7b9ee0b4"`
[INFO] [stdout] 873c76f34ba7541952faf3480ebc76fb0cedb263784578f6ec38ea0c7b9ee0b4