[INFO] updating cached repository https://github.com/kentfredric/grease
[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] 56f6e1b303719b08166b18b40d7cfea4fe2e5c4f
[INFO] testing kentfredric/grease against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkentfredric%2Fgrease" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kentfredric/grease on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/kentfredric/grease
[INFO] finished tweaking git repo https://github.com/kentfredric/grease
[INFO] tweaked toml for git repo https://github.com/kentfredric/grease written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/kentfredric/grease already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2c2f9c415808673ea95818a0519901b7613f716fbe9633c382a00480b89fb29d
[INFO] running `"docker" "start" "-a" "2c2f9c415808673ea95818a0519901b7613f716fbe9633c382a00480b89fb29d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]    Compiling libc v0.2.57
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]    Compiling rustc-demangle v0.1.15
[INFO] [stderr]    Compiling backtrace v0.3.26
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]    Compiling backtrace-sys v0.1.28
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]    Compiling grease v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: couldn't read src/repository/repository/struct.Category.md: No such file or directory (os error 2)
[INFO] [stderr]   --> src/repository/category.rs:15:19
[INFO] [stderr]    |
[INFO] [stderr] 15 |     doc(include = "repository/struct.Category.md")
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stderr] 
[INFO] [stderr] error: couldn't read src/repository/repository/struct.CategoryFileIterator.md: No such file or directory (os error 2)
[INFO] [stderr]   --> src/repository/category.rs:80:19
[INFO] [stderr]    |
[INFO] [stderr] 80 |     doc(include = "repository/struct.CategoryFileIterator.md")
[INFO] [stderr]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stderr] 
[INFO] [stderr] error: couldn't read src/repository/repository/struct.CategoryDirsIterator.md: No such file or directory (os error 2)
[INFO] [stderr]    --> src/repository/category.rs:355:19
[INFO] [stderr]     |
[INFO] [stderr] 355 |     doc(include = "repository/struct.CategoryDirsIterator.md")
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stderr] 
[INFO] [stderr] error: couldn't read src/repository/repository/struct.Ebuild.md: No such file or directory (os error 2)
[INFO] [stderr]  --> src/repository/ebuild.rs:8:19
[INFO] [stderr]   |
[INFO] [stderr] 8 |     doc(include = "repository/struct.Ebuild.md")
[INFO] [stderr]   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stderr] 
[INFO] [stderr] error: couldn't read src/repository/repository/struct.Package.md: No such file or directory (os error 2)
[INFO] [stderr]  --> src/repository/package.rs:7:19
[INFO] [stderr]   |
[INFO] [stderr] 7 |     doc(include = "repository/struct.Package.md")
[INFO] [stderr]   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:4:39
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![cfg_attr(feature = "external_doc", feature(external_doc))]
[INFO] [stderr]   |                                       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 6 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `grease`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2c2f9c415808673ea95818a0519901b7613f716fbe9633c382a00480b89fb29d"`
[INFO] running `"docker" "rm" "-f" "2c2f9c415808673ea95818a0519901b7613f716fbe9633c382a00480b89fb29d"`
[INFO] [stdout] 2c2f9c415808673ea95818a0519901b7613f716fbe9633c382a00480b89fb29d