[INFO] fetching crate tmfalloc 0.1.3...
[INFO] documenting tmfalloc-0.1.3 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate tmfalloc 0.1.3 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate tmfalloc 0.1.3 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate tmfalloc 0.1.3
[INFO] finished tweaking crates.io crate tmfalloc 0.1.3
[INFO] tweaked toml for crates.io crate tmfalloc 0.1.3 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "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" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded test-binary v3.0.2
[INFO] [stderr]   Downloaded const-str v0.5.6
[INFO] [stderr]   Downloaded const-str-proc-macro v0.5.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 41a74b7967a253faa18105cb7110ba806bfd2b8cfd7c613c1704cc9a31025892
[INFO] running `Command { std: "docker" "start" "-a" "41a74b7967a253faa18105cb7110ba806bfd2b8cfd7c613c1704cc9a31025892", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "41a74b7967a253faa18105cb7110ba806bfd2b8cfd7c613c1704cc9a31025892", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41a74b7967a253faa18105cb7110ba806bfd2b8cfd7c613c1704cc9a31025892", kill_on_drop: false }`
[INFO] [stdout] 41a74b7967a253faa18105cb7110ba806bfd2b8cfd7c613c1704cc9a31025892
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8ddde4d4ef6b7ca92129016409d69b22c931f3ddf300b668f7001f4421abea04
[INFO] running `Command { std: "docker" "start" "-a" "8ddde4d4ef6b7ca92129016409d69b22c931f3ddf300b668f7001f4421abea04", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.76
[INFO] [stderr]     Checking bitflags v2.4.1
[INFO] [stderr]     Checking errno v0.3.8
[INFO] [stderr]     Checking intrusive-collections v0.9.6
[INFO] [stderr]     Checking nix v0.27.1
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling syn v2.0.48
[INFO] [stderr]    Compiling const-str-proc-macro v0.5.4
[INFO] [stderr]    Compiling ctor v0.2.6
[INFO] [stderr]     Checking const-str v0.5.6
[INFO] [stderr]  Documenting tmfalloc v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:249:1
[INFO] [stdout]     |
[INFO] [stdout] 249 | / #![feature(
[INFO] [stdout] 250 | |     allocator_api,
[INFO] [stdout] 251 | |     pointer_byte_offsets,
[INFO] [stdout] 252 | |     btree_cursors,
[INFO] [stdout] ...   |
[INFO] [stdout] 259 | |     io_error_uncategorized
[INFO] [stdout] 260 | | )]
[INFO] [stdout]     | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 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 `tmfalloc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.75.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2021 --crate-type lib --crate-name tmfalloc src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c0ae0eb7bd8c2ab0 -L dependency=/opt/rustwide/target/debug/deps --extern const_str=/opt/rustwide/target/debug/deps/libconst_str-ecf1df2860a759b3.rmeta --extern ctor=/opt/rustwide/target/debug/deps/libctor-1f7e6e9c0b0dad00.so --extern errno=/opt/rustwide/target/debug/deps/liberrno-aecdae6012abe46b.rmeta --extern intrusive_collections=/opt/rustwide/target/debug/deps/libintrusive_collections-2b9f92d1380f2891.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-703a71779d7c4255.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-e0c14c8cb009095a.rmeta --cap-lints=warn --crate-version 0.1.3` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "8ddde4d4ef6b7ca92129016409d69b22c931f3ddf300b668f7001f4421abea04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ddde4d4ef6b7ca92129016409d69b22c931f3ddf300b668f7001f4421abea04", kill_on_drop: false }`
[INFO] [stdout] 8ddde4d4ef6b7ca92129016409d69b22c931f3ddf300b668f7001f4421abea04
