[INFO] fetching crate mdbook-bibfile-referencing 0.3.0...
[INFO] testing mdbook-bibfile-referencing-0.3.0 against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-8
[INFO] extracting crate mdbook-bibfile-referencing 0.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate mdbook-bibfile-referencing 0.3.0
[INFO] finished tweaking crates.io crate mdbook-bibfile-referencing 0.3.0
[INFO] tweaked toml for crates.io crate mdbook-bibfile-referencing 0.3.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mdbook-bibfile-referencing 0.3.0 on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mdbook-bibfile-referencing 0.3.0 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded either v1.8.0
[INFO] [stderr]   Downloaded version-compare v0.1.1
[INFO] [stderr]   Downloaded pest_derive v2.5.1
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.83
[INFO] [stderr]   Downloaded link-cplusplus v1.0.7
[INFO] [stderr]   Downloaded scratch v1.0.2
[INFO] [stderr]   Downloaded iana-time-zone-haiku v0.1.1
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.83
[INFO] [stderr]   Downloaded indexmap v1.9.2
[INFO] [stderr]   Downloaded core-foundation-sys v0.8.3
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.83
[INFO] [stderr]   Downloaded js-sys v0.3.60
[INFO] [stderr]   Downloaded cc v1.0.77
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.83
[INFO] [stderr]   Downloaded codespan-reporting v0.11.1
[INFO] [stderr]   Downloaded cxx-build v1.0.83
[INFO] [stderr]   Downloaded pest v2.5.1
[INFO] [stderr]   Downloaded bumpalo v3.11.1
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.83
[INFO] [stderr]   Downloaded cxx v1.0.83
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.83
[INFO] [stderr]   Downloaded digest v0.10.6
[INFO] [stderr]   Downloaded handlebars v4.3.5
[INFO] [stderr]   Downloaded serde v1.0.149
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.83
[INFO] [stderr]   Downloaded ucd-trie v0.1.5
[INFO] [stderr]   Downloaded cpufeatures v0.2.5
[INFO] [stderr]   Downloaded block-buffer v0.10.3
[INFO] [stderr]   Downloaded generic-array v0.14.6
[INFO] [stderr]   Downloaded sha1 v0.10.5
[INFO] [stderr]   Downloaded pest_generator v2.5.1
[INFO] [stderr]   Downloaded chrono v0.4.23
[INFO] [stderr]   Downloaded serde_derive v1.0.149
[INFO] [stderr]   Downloaded textwrap v0.16.0
[INFO] [stderr]   Downloaded clap_complete v3.2.5
[INFO] [stderr]   Downloaded typenum v1.16.0
[INFO] [stderr]   Downloaded clap v3.2.23
[INFO] [stderr]   Downloaded pest_meta v2.5.1
[INFO] [stderr]   Downloaded iana-time-zone v0.1.53
[INFO] [stderr]   Downloaded toml v0.5.9
[INFO] [stderr]   Downloaded pandoc v0.8.10
[INFO] [stderr]   Downloaded linux-raw-sys v0.1.3
[INFO] [stderr]   Downloaded mdbook v0.4.22
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2cc828014ebef914b89390f832fa0720231554f43b096334fc3fd5b7be9da61e
[INFO] running `Command { std: "docker" "start" "-a" "2cc828014ebef914b89390f832fa0720231554f43b096334fc3fd5b7be9da61e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2cc828014ebef914b89390f832fa0720231554f43b096334fc3fd5b7be9da61e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cc828014ebef914b89390f832fa0720231554f43b096334fc3fd5b7be9da61e", kill_on_drop: false }`
[INFO] [stdout] 2cc828014ebef914b89390f832fa0720231554f43b096334fc3fd5b7be9da61e
[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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd29bea6341960575ed931a8fa3f6f9fd6c13b0a97707ab6d77941a3ee32c033
[INFO] running `Command { std: "docker" "start" "-a" "fd29bea6341960575ed931a8fa3f6f9fd6c13b0a97707ab6d77941a3ee32c033", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_derive v1.0.149
[INFO] [stderr]    Compiling serde v1.0.149
[INFO] [stderr]    Compiling os_str_bytes v6.4.1
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling termcolor v1.1.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.47
[INFO] [stderr]    Compiling thiserror v1.0.37
[INFO] [stderr]    Compiling indexmap v1.9.2
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling serde_json v1.0.89
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling rustix v0.36.5
[INFO] [stderr]    Compiling io-lifetimes v1.0.3
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling linux-raw-sys v0.1.3
[INFO] [stderr]    Compiling textwrap v0.16.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.47/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling ryu v1.0.11
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stderr]    Compiling pulldown-cmark v0.9.2
[INFO] [stderr]    Compiling itoa v1.0.4
[INFO] [stderr]    Compiling anyhow v1.0.66
[INFO] [stderr]    Compiling bstr v0.2.17
[INFO] [stderr]    Compiling time v0.1.45
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]    Compiling humantime v2.1.0
[INFO] [stderr]    Compiling either v1.8.0
[INFO] [stderr]    Compiling fastrand v1.8.0
[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" "fd29bea6341960575ed931a8fa3f6f9fd6c13b0a97707ab6d77941a3ee32c033", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd29bea6341960575ed931a8fa3f6f9fd6c13b0a97707ab6d77941a3ee32c033", kill_on_drop: false }`
[INFO] [stdout] fd29bea6341960575ed931a8fa3f6f9fd6c13b0a97707ab6d77941a3ee32c033