[INFO] fetching crate mdbook-readme-summary 1.1.1...
[INFO] testing mdbook-readme-summary-1.1.1 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] extracting crate mdbook-readme-summary 1.1.1 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate mdbook-readme-summary 1.1.1
[INFO] finished tweaking crates.io crate mdbook-readme-summary 1.1.1
[INFO] tweaked toml for crates.io crate mdbook-readme-summary 1.1.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mdbook-readme-summary 1.1.1 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mdbook-readme-summary 1.1.1 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded toml v0.7.3
[INFO] [stderr]   Downloaded pathbuf v0.3.1
[INFO] [stderr]   Downloaded quote v1.0.27
[INFO] [stderr]   Downloaded toml_datetime v0.6.1
[INFO] [stderr]   Downloaded semver v1.0.17
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.94
[INFO] [stderr]   Downloaded clap_lex v0.4.1
[INFO] [stderr]   Downloaded gitignore v1.0.8
[INFO] [stderr]   Downloaded new_debug_unreachable v1.0.4
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.85
[INFO] [stderr]   Downloaded scratch v1.0.5
[INFO] [stderr]   Downloaded terminal_size v0.2.6
[INFO] [stderr]   Downloaded cpufeatures v0.2.7
[INFO] [stderr]   Downloaded serde_spanned v0.6.1
[INFO] [stderr]   Downloaded thiserror-impl v1.0.40
[INFO] [stderr]   Downloaded notify-debouncer-mini v0.2.1
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.85
[INFO] [stderr]   Downloaded anstyle v1.0.0
[INFO] [stderr]   Downloaded opener v0.5.2
[INFO] [stderr]   Downloaded fs v0.0.5
[INFO] [stderr]   Downloaded topological-sort v0.2.2
[INFO] [stderr]   Downloaded string_cache v0.8.7
[INFO] [stderr]   Downloaded tokio-tungstenite v0.18.0
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.85
[INFO] [stderr]   Downloaded anstyle-parse v0.2.0
[INFO] [stderr]   Downloaded iana-time-zone v0.1.56
[INFO] [stderr]   Downloaded pest_derive v2.6.0
[INFO] [stderr]   Downloaded pest_generator v2.6.0
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.85
[INFO] [stderr]   Downloaded string_cache_codegen v0.5.2
[INFO] [stderr]   Downloaded toml_edit v0.19.8
[INFO] [stderr]   Downloaded ammonia v3.3.0
[INFO] [stderr]   Downloaded thiserror v1.0.40
[INFO] [stderr]   Downloaded anyhow v1.0.71
[INFO] [stderr]   Downloaded env_logger v0.10.0
[INFO] [stderr]   Downloaded clap v4.2.7
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.94
[INFO] [stderr]   Downloaded tungstenite v0.18.0
[INFO] [stderr]   Downloaded headers v0.3.8
[INFO] [stderr]   Downloaded bumpalo v3.12.2
[INFO] [stderr]   Downloaded clap_complete v4.2.2
[INFO] [stderr]   Downloaded pest_meta v2.6.0
[INFO] [stderr]   Downloaded handlebars v4.3.6
[INFO] [stderr]   Downloaded cxx-build v1.0.94
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[INFO] [stderr]   Downloaded rustls-pemfile v1.0.2
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[INFO] [stderr]   Downloaded cxx v1.0.94
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.85
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[INFO] [stderr]   Downloaded clap_builder v4.2.7
[INFO] [stderr]   Downloaded tokio-stream v0.1.14
[INFO] [stderr]   Downloaded bstr v1.4.0
[INFO] [stderr]   Downloaded rustix v0.37.19
[INFO] [stderr]   Downloaded linux-raw-sys v0.3.7
[INFO] [stderr]   Downloaded mdbook v0.4.28
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9bac0d7bf6c28754bb01666688d158d25b797b0123c3f4d7ec8b7380a8caa581
[INFO] running `Command { std: "docker" "start" "-a" "9bac0d7bf6c28754bb01666688d158d25b797b0123c3f4d7ec8b7380a8caa581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9bac0d7bf6c28754bb01666688d158d25b797b0123c3f4d7ec8b7380a8caa581", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bac0d7bf6c28754bb01666688d158d25b797b0123c3f4d7ec8b7380a8caa581", kill_on_drop: false }`
[INFO] [stdout] 9bac0d7bf6c28754bb01666688d158d25b797b0123c3f4d7ec8b7380a8caa581
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c987841a101ae21256ac3cba89e6c1e9372a1fb93c4994e19f9dc96740f68de4
[INFO] running `Command { std: "docker" "start" "-a" "c987841a101ae21256ac3cba89e6c1e9372a1fb93c4994e19f9dc96740f68de4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.56
[INFO] [stderr]    Compiling quote v1.0.27
[INFO] [stderr]    Compiling unicode-ident v1.0.8
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling once_cell v1.17.1
[INFO] [stderr]    Compiling serde_derive v1.0.162
[INFO] [stderr]    Compiling serde v1.0.162
[INFO] [stderr]    Compiling itoa v1.0.6
[INFO] [stderr]    Compiling bytes v1.4.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.10
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.56/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a feature with a similar name: `proc_macro_span_file`
[INFO] [stdout]    |
[INFO] [stdout] 92 -     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout] 92 +     feature(proc_macro_span, proc_macro_span_file)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling pin-project-lite v0.2.9
[INFO] [stderr]    Compiling phf_shared v0.10.0
[INFO] [stderr]    Compiling futures-core v0.3.28
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `proc-macro2` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "c987841a101ae21256ac3cba89e6c1e9372a1fb93c4994e19f9dc96740f68de4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c987841a101ae21256ac3cba89e6c1e9372a1fb93c4994e19f9dc96740f68de4", kill_on_drop: false }`
[INFO] [stdout] c987841a101ae21256ac3cba89e6c1e9372a1fb93c4994e19f9dc96740f68de4