[INFO] cloning repository https://github.com/MathiasKoch/rust-fatfs-issue
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MathiasKoch/rust-fatfs-issue" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMathiasKoch%2Frust-fatfs-issue", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMathiasKoch%2Frust-fatfs-issue'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c3f03f807e7e1bf0ab0719db6eb5bb39731b649c
[INFO] documenting MathiasKoch/rust-fatfs-issue against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMathiasKoch%2Frust-fatfs-issue" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MathiasKoch/rust-fatfs-issue on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-12/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/MathiasKoch/rust-fatfs-issue
[INFO] finished tweaking git repo https://github.com/MathiasKoch/rust-fatfs-issue
[INFO] tweaked toml for git repo https://github.com/MathiasKoch/rust-fatfs-issue written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/MathiasKoch/rust-fatfs-issue already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 03e3df0ff4c8ec0ce204ed9842a0e84d9c62922b61ecf9d6aa7552a1506f9b54
[INFO] running `Command { std: "docker" "start" "-a" "03e3df0ff4c8ec0ce204ed9842a0e84d9c62922b61ecf9d6aa7552a1506f9b54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03e3df0ff4c8ec0ce204ed9842a0e84d9c62922b61ecf9d6aa7552a1506f9b54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03e3df0ff4c8ec0ce204ed9842a0e84d9c62922b61ecf9d6aa7552a1506f9b54", kill_on_drop: false }`
[INFO] [stdout] 03e3df0ff4c8ec0ce204ed9842a0e84d9c62922b61ecf9d6aa7552a1506f9b54
[INFO] running `Command { std: "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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 85b484d62e8afe16798da0a030d6bc4e450df9f94d32db29b2422b29d8d7d983
[INFO] running `Command { std: "docker" "start" "-a" "85b484d62e8afe16798da0a030d6bc4e450df9f94d32db29b2422b29d8d7d983", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.104
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking embedded-storage v0.2.0
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking fatfs v0.4.0 (https://github.com/rafalh/rust-fatfs#48d428db)
[INFO] [stderr]     Checking libc-print v0.1.17
[INFO] [stderr]  Documenting fatfs-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(lang_items, start, libc, core_intrinsics, rustc_private)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 document `fatfs-test`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name fatfs_test src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=c90cf2abd11c41f0 -L dependency=/opt/rustwide/target/debug/deps --extern embedded_storage=/opt/rustwide/target/debug/deps/libembedded_storage-6ab3db14b8e91224.rmeta --extern fatfs=/opt/rustwide/target/debug/deps/libfatfs-cc929afb3c211a7b.rmeta --extern libc_print=/opt/rustwide/target/debug/deps/liblibc_print-d04a93f70c4825bb.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-5697258268d98425.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "85b484d62e8afe16798da0a030d6bc4e450df9f94d32db29b2422b29d8d7d983", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85b484d62e8afe16798da0a030d6bc4e450df9f94d32db29b2422b29d8d7d983", kill_on_drop: false }`
[INFO] [stdout] 85b484d62e8afe16798da0a030d6bc4e450df9f94d32db29b2422b29d8d7d983