[INFO] fetching crate mocktopus_macros 0.7.11...
[INFO] documenting mocktopus_macros-0.7.11 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate mocktopus_macros 0.7.11 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate mocktopus_macros 0.7.11 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mocktopus_macros 0.7.11
[INFO] finished tweaking crates.io crate mocktopus_macros 0.7.11
[INFO] tweaked toml for crates.io crate mocktopus_macros 0.7.11 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 01737cf523db720c2a8f90085e625656650e9ddcdd57704f5a0aab4673fe78a4
[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" "01737cf523db720c2a8f90085e625656650e9ddcdd57704f5a0aab4673fe78a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "01737cf523db720c2a8f90085e625656650e9ddcdd57704f5a0aab4673fe78a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01737cf523db720c2a8f90085e625656650e9ddcdd57704f5a0aab4673fe78a4", kill_on_drop: false }`
[INFO] [stdout] 01737cf523db720c2a8f90085e625656650e9ddcdd57704f5a0aab4673fe78a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 63ef6bc6b1b0f78b62023f2299423067b0710c9c34bab1c2533b0bb5b8675604
[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" "63ef6bc6b1b0f78b62023f2299423067b0710c9c34bab1c2533b0bb5b8675604", kill_on_drop: false }`
[INFO] [stderr]  Documenting mocktopus_macros v0.7.11 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(proc_macro_diagnostic)]
[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 `mocktopus_macros`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type proc-macro --crate-name mocktopus_macros src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-c395b40247ac8d91.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-901816f2d165e43f.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-6dd426ac9f732e06.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.7.11` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "63ef6bc6b1b0f78b62023f2299423067b0710c9c34bab1c2533b0bb5b8675604", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63ef6bc6b1b0f78b62023f2299423067b0710c9c34bab1c2533b0bb5b8675604", kill_on_drop: false }`
[INFO] [stdout] 63ef6bc6b1b0f78b62023f2299423067b0710c9c34bab1c2533b0bb5b8675604
