[INFO] fetching crate psp 0.2.1...
[INFO] documenting psp-0.2.1 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate psp 0.2.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate psp 0.2.1 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate psp 0.2.1
[INFO] finished tweaking crates.io crate psp 0.2.1
[INFO] tweaked toml for crates.io crate psp 0.2.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded unstringify v0.1.4
[INFO] [stderr]   Downloaded fixed v0.5.7
[INFO] [stderr]   Downloaded az v1.2.0
[INFO] [stderr]   Downloaded embedded-graphics-core v0.3.3
[INFO] [stderr]   Downloaded micromath v1.1.1
[INFO] [stderr]   Downloaded embedded-graphics v0.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.61.0" "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] 1168acbe0856906cbeca712f98c53b167f0ec72830b6fca22fdb0dd33d9f34c4
[INFO] running `Command { std: "docker" "start" "-a" "1168acbe0856906cbeca712f98c53b167f0ec72830b6fca22fdb0dd33d9f34c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1168acbe0856906cbeca712f98c53b167f0ec72830b6fca22fdb0dd33d9f34c4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1168acbe0856906cbeca712f98c53b167f0ec72830b6fca22fdb0dd33d9f34c4", kill_on_drop: false }`
[INFO] [stdout] 1168acbe0856906cbeca712f98c53b167f0ec72830b6fca22fdb0dd33d9f34c4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+1.61.0" "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] 58f231f752628fbba070d6cf1fe1875ec386da397029b135f0229bb48f39b3ad
[INFO] running `Command { std: "docker" "start" "-a" "58f231f752628fbba070d6cf1fe1875ec386da397029b135f0229bb48f39b3ad", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling psp v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]    Compiling unstringify v0.1.4
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]    Compiling num_enum_derive v0.5.7
[INFO] [stderr]     Checking num_enum v0.5.7
[INFO] [stderr]  Documenting psp v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:2:1
[INFO] [stdout]    |
[INFO] [stdout] 2  | / #![feature(
[INFO] [stdout] 3  | |     asm_experimental_arch,
[INFO] [stdout] 4  | |     alloc_error_handler,
[INFO] [stdout] 5  | |     global_asm,
[INFO] [stdout] ...  |
[INFO] [stdout] 11 | |     lang_items,
[INFO] [stdout] 12 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_loop` has been stable since 1.46.0 and no longer requires an attribute to enable
[INFO] [stdout]    = help: the feature `const_if_match` has been stable since 1.46.0 and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(std_internals, panic_info_message, panic_internals, c_unwind)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:16:41
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![cfg_attr(not(feature = "stub-only"), feature(panic_unwind))]
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 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 `psp`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-type staticlib --crate-name psp src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7002bbb2593ff3ad -L dependency=/opt/rustwide/target/debug/deps --extern bitflags=/opt/rustwide/target/debug/deps/libbitflags-22d7f70832a3b85e.rmeta --extern num_enum=/opt/rustwide/target/debug/deps/libnum_enum-b36cb1141799e548.rmeta --extern num_enum_derive=/opt/rustwide/target/debug/deps/libnum_enum_derive-11c07e3cff7848f6.so --extern paste=/opt/rustwide/target/debug/deps/libpaste-41be4954267ff1d2.rmeta --extern unstringify=/opt/rustwide/target/debug/deps/libunstringify-cc956c6f3e46f88f.so --cap-lints=warn --crate-version 0.2.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "58f231f752628fbba070d6cf1fe1875ec386da397029b135f0229bb48f39b3ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58f231f752628fbba070d6cf1fe1875ec386da397029b135f0229bb48f39b3ad", kill_on_drop: false }`
[INFO] [stdout] 58f231f752628fbba070d6cf1fe1875ec386da397029b135f0229bb48f39b3ad