[INFO] fetching crate mips-mcu-alloc 0.6.1...
[INFO] documenting mips-mcu-alloc-0.6.1 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate mips-mcu-alloc 0.6.1 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate mips-mcu-alloc 0.6.1 on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mips-mcu-alloc 0.6.1
[INFO] finished tweaking crates.io crate mips-mcu-alloc 0.6.1
[INFO] tweaked toml for crates.io crate mips-mcu-alloc 0.6.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mips-mcu v0.3.1
[INFO] [stderr]   Downloaded mips-rt-macros v0.3.4
[INFO] [stderr]   Downloaded linked_list_allocator v0.10.5
[INFO] [stderr]   Downloaded mips-rt v0.3.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9039d3cee1b6f7f41979b2ecfd3251a6eacfbc6461d59947146286a57969968b
[INFO] running `Command { std: "docker" "start" "-a" "9039d3cee1b6f7f41979b2ecfd3251a6eacfbc6461d59947146286a57969968b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9039d3cee1b6f7f41979b2ecfd3251a6eacfbc6461d59947146286a57969968b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9039d3cee1b6f7f41979b2ecfd3251a6eacfbc6461d59947146286a57969968b", kill_on_drop: false }`
[INFO] [stdout] 9039d3cee1b6f7f41979b2ecfd3251a6eacfbc6461d59947146286a57969968b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.76.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f34ff367f8b8c9cfdb98e423150c0a1072099ede5b463e34c7b221a25b3c19c1
[INFO] running `Command { std: "docker" "start" "-a" "f34ff367f8b8c9cfdb98e423150c0a1072099ede5b463e34c7b221a25b3c19c1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling mips-mcu v0.3.1
[INFO] [stderr]    Compiling mips-rt v0.3.5
[INFO] [stderr]     Checking critical-section v1.1.2
[INFO] [stderr]     Checking linked_list_allocator v0.10.5
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling mips-rt-macros v0.3.4
[INFO] [stderr]  Documenting mips-mcu-alloc v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:40:1
[INFO] [stdout]    |
[INFO] [stdout] 40 | #![feature(asm_experimental_arch)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `mips-mcu-alloc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.76.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name mips_mcu_alloc src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=8ce132a2523dda45 -L dependency=/opt/rustwide/target/debug/deps --extern critical_section=/opt/rustwide/target/debug/deps/libcritical_section-939be3ce8e75d091.rmeta --extern linked_list_allocator=/opt/rustwide/target/debug/deps/liblinked_list_allocator-dae635ba37e2eb8c.rmeta --extern mips_mcu=/opt/rustwide/target/debug/deps/libmips_mcu-02d9c7eba5129bad.rmeta --extern mips_rt=/opt/rustwide/target/debug/deps/libmips_rt-957652c027210105.rmeta --cap-lints=warn --crate-version 0.6.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "f34ff367f8b8c9cfdb98e423150c0a1072099ede5b463e34c7b221a25b3c19c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f34ff367f8b8c9cfdb98e423150c0a1072099ede5b463e34c7b221a25b3c19c1", kill_on_drop: false }`
[INFO] [stdout] f34ff367f8b8c9cfdb98e423150c0a1072099ede5b463e34c7b221a25b3c19c1
