[INFO] fetching crate null-terminated 0.3.17...
[INFO] documenting null-terminated-0.3.17 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate null-terminated 0.3.17 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate null-terminated 0.3.17 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate null-terminated 0.3.17
[INFO] finished tweaking crates.io crate null-terminated 0.3.17
[INFO] tweaked toml for crates.io crate null-terminated 0.3.17 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate null-terminated 0.3.17 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitflags v1.0.3
[INFO] [stderr]   Downloaded cfg-if v0.1.4
[INFO] [stderr]   Downloaded log v0.4.3
[INFO] [stderr]   Downloaded lazy_static v1.0.2
[INFO] [stderr]   Downloaded byte-strings-proc_macros v0.2.1
[INFO] [stderr]   Downloaded rand_core v0.3.0
[INFO] [stderr]   Downloaded winapi v0.3.5
[INFO] [stderr]   Downloaded system-call v0.1.1
[INFO] [stderr]   Downloaded utf v0.1.0
[INFO] [stderr]   Downloaded libc v0.2.42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cf80643c428cf2ac824bcff52295abff1604519bf4b0277826e551d21fb9e137
[INFO] running `Command { std: "docker" "start" "-a" "cf80643c428cf2ac824bcff52295abff1604519bf4b0277826e551d21fb9e137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cf80643c428cf2ac824bcff52295abff1604519bf4b0277826e551d21fb9e137", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf80643c428cf2ac824bcff52295abff1604519bf4b0277826e551d21fb9e137", kill_on_drop: false }`
[INFO] [stdout] cf80643c428cf2ac824bcff52295abff1604519bf4b0277826e551d21fb9e137
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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=warn" "-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33176aaf2e8da8579d0a59379594e52f4a613d1b842291b417b0d546be31c95d
[INFO] running `Command { std: "docker" "start" "-a" "33176aaf2e8da8579d0a59379594e52f4a613d1b842291b417b0d546be31c95d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling syn v1.0.36
[INFO] [stderr]     Checking utf v0.1.0
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling byte-strings-proc_macros v0.2.1
[INFO] [stderr]  Documenting null-terminated v0.3.17 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:25:1
[INFO] [stdout]    |
[INFO] [stdout] 25 | #![feature(const_raw_ptr_deref)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_raw_ptr_deref` has been stable since `1.58.0` 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:26:1
[INFO] [stdout]    |
[INFO] [stdout] 26 | #![feature(extern_types)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[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 `null-terminated`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name null_terminated src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="utf"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=82d7813a33608469 -L dependency=/opt/rustwide/target/debug/deps --extern byte_strings_proc_macros=/opt/rustwide/target/debug/deps/libbyte_strings_proc_macros-4b9336b675ef8445.so --extern unreachable=/opt/rustwide/target/debug/deps/libunreachable-81818601b7b1c16b.rmeta --extern utf=/opt/rustwide/target/debug/deps/libutf-3913aa8c31976742.rmeta --cap-lints=warn --crate-version 0.3.17` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "33176aaf2e8da8579d0a59379594e52f4a613d1b842291b417b0d546be31c95d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33176aaf2e8da8579d0a59379594e52f4a613d1b842291b417b0d546be31c95d", kill_on_drop: false }`
[INFO] [stdout] 33176aaf2e8da8579d0a59379594e52f4a613d1b842291b417b0d546be31c95d
