[INFO] cloning repository https://github.com/kentfredric/grease
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kentfredric/grease" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkentfredric%2Fgrease", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkentfredric%2Fgrease'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 56f6e1b303719b08166b18b40d7cfea4fe2e5c4f
[INFO] checking kentfredric/grease against beta for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkentfredric%2Fgrease" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kentfredric/grease on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-4/source/Cargo.toml
[INFO] crate git repo https://github.com/kentfredric/grease already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6213f4ae68ff98a75d68014fa380699f49d1fa0cb1955290059928e2303658fa
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6213f4ae68ff98a75d68014fa380699f49d1fa0cb1955290059928e2303658fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6213f4ae68ff98a75d68014fa380699f49d1fa0cb1955290059928e2303658fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6213f4ae68ff98a75d68014fa380699f49d1fa0cb1955290059928e2303658fa", kill_on_drop: false }`
[INFO] [stdout] 6213f4ae68ff98a75d68014fa380699f49d1fa0cb1955290059928e2303658fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 04361a66610b4fb2048393cf1d56a19670ce17656062e6d985b5b55e514f27e6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "04361a66610b4fb2048393cf1d56a19670ce17656062e6d985b5b55e514f27e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling libc v0.2.57
[INFO] [stderr]    Compiling backtrace v0.3.26
[INFO] [stderr]     Checking backtrace-sys v0.1.28
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking grease v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: couldn't read src/repository/repository/struct.Category.md: No such file or directory (os error 2)
[INFO] [stdout]   --> src/repository/category.rs:15:19
[INFO] [stdout]    |
[INFO] [stdout] 15 |     doc(include = "repository/struct.Category.md")
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read src/repository/repository/struct.Category.md: No such file or directory (os error 2)
[INFO] [stdout]   --> src/repository/category.rs:15:19
[INFO] [stdout]    |
[INFO] [stdout] 15 |     doc(include = "repository/struct.Category.md")
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read src/repository/repository/struct.CategoryFileIterator.md: No such file or directory (os error 2)
[INFO] [stdout]   --> src/repository/category.rs:80:19
[INFO] [stdout]    |
[INFO] [stdout] 80 |     doc(include = "repository/struct.CategoryFileIterator.md")
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read src/repository/repository/struct.CategoryFileIterator.md: No such file or directory (os error 2)
[INFO] [stdout]   --> src/repository/category.rs:80:19
[INFO] [stdout]    |
[INFO] [stdout] 80 |     doc(include = "repository/struct.CategoryFileIterator.md")
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read src/repository/repository/struct.CategoryDirsIterator.md: No such file or directory (os error 2)
[INFO] [stdout]    --> src/repository/category.rs:355:19
[INFO] [stdout]     |
[INFO] [stdout] 355 |     doc(include = "repository/struct.CategoryDirsIterator.md")
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read src/repository/repository/struct.Ebuild.md: No such file or directory (os error 2)
[INFO] [stdout]  --> src/repository/ebuild.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 |     doc(include = "repository/struct.Ebuild.md")
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read src/repository/repository/struct.Package.md: No such file or directory (os error 2)
[INFO] [stdout]  --> src/repository/package.rs:7:19
[INFO] [stdout]   |
[INFO] [stdout] 7 |     doc(include = "repository/struct.Package.md")
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read src/repository/repository/struct.CategoryDirsIterator.md: No such file or directory (os error 2)
[INFO] [stdout]    --> src/repository/category.rs:355:19
[INFO] [stdout]     |
[INFO] [stdout] 355 |     doc(include = "repository/struct.CategoryDirsIterator.md")
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read src/repository/repository/struct.Ebuild.md: No such file or directory (os error 2)
[INFO] [stdout]  --> src/repository/ebuild.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 |     doc(include = "repository/struct.Ebuild.md")
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: couldn't read src/repository/repository/struct.Package.md: No such file or directory (os error 2)
[INFO] [stdout]  --> src/repository/package.rs:7:19
[INFO] [stdout]   |
[INFO] [stdout] 7 |     doc(include = "repository/struct.Package.md")
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ couldn't read file
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:4:39
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![cfg_attr(feature = "external_doc", feature(external_doc))]
[INFO] [stdout]   |                                       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:4:39
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![cfg_attr(feature = "external_doc", feature(external_doc))]
[INFO] [stdout]   |                                       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `grease`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "04361a66610b4fb2048393cf1d56a19670ce17656062e6d985b5b55e514f27e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04361a66610b4fb2048393cf1d56a19670ce17656062e6d985b5b55e514f27e6", kill_on_drop: false }`
[INFO] [stdout] 04361a66610b4fb2048393cf1d56a19670ce17656062e6d985b5b55e514f27e6