[INFO] fetching crate wasmir 0.1.13...
[INFO] documenting wasmir-0.1.13 against 1.76.0 for beta-1.77-rustdoc-1
[INFO] extracting crate wasmir 0.1.13 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate wasmir 0.1.13 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 wasmir 0.1.13
[INFO] finished tweaking crates.io crate wasmir 0.1.13
[INFO] tweaked toml for crates.io crate wasmir 0.1.13 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate wasmir 0.1.13 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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] e22f71ef8a0e4aa3aac4fa1063911a63bfd2baf5729490fd0afb72fee903c9f8
[INFO] running `Command { std: "docker" "start" "-a" "e22f71ef8a0e4aa3aac4fa1063911a63bfd2baf5729490fd0afb72fee903c9f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e22f71ef8a0e4aa3aac4fa1063911a63bfd2baf5729490fd0afb72fee903c9f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e22f71ef8a0e4aa3aac4fa1063911a63bfd2baf5729490fd0afb72fee903c9f8", kill_on_drop: false }`
[INFO] [stdout] e22f71ef8a0e4aa3aac4fa1063911a63bfd2baf5729490fd0afb72fee903c9f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 381332f2298dfdb17beebdcedea1a836f7d43a684d7487b3b4b587b5e4e01b1c
[INFO] running `Command { std: "docker" "start" "-a" "381332f2298dfdb17beebdcedea1a836f7d43a684d7487b3b4b587b5e4e01b1c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.74
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling bumpalo v3.7.0
[INFO] [stderr]     Checking unicode-xid v0.2.2
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling wasm-bindgen v0.2.74
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking quote v1.0.9
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.74
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.74
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.74
[INFO] [stderr]  Documenting wasmir v0.1.13 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(string_remove_matches)]
[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 `wasmir`
[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=2018 --crate-type proc-macro --crate-name wasmir src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=26744e11b7ac0349 -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-4934e4b05086cc59.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-6b31f7f64e34667f.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-512104627dce0d03.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-9a93f574cdda8d89.rmeta --extern wasm_bindgen=/opt/rustwide/target/debug/deps/libwasm_bindgen-ccde5684de20346d.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.13` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "381332f2298dfdb17beebdcedea1a836f7d43a684d7487b3b4b587b5e4e01b1c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "381332f2298dfdb17beebdcedea1a836f7d43a684d7487b3b4b587b5e4e01b1c", kill_on_drop: false }`
[INFO] [stdout] 381332f2298dfdb17beebdcedea1a836f7d43a684d7487b3b4b587b5e4e01b1c
