[INFO] fetching crate mdbook-external-links 0.1.1...
[INFO] checking mdbook-external-links-0.1.1 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate mdbook-external-links 0.1.1 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate mdbook-external-links 0.1.1 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mdbook-external-links 0.1.1
[INFO] finished tweaking crates.io crate mdbook-external-links 0.1.1
[INFO] tweaked toml for crates.io crate mdbook-external-links 0.1.1 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate crates.io crate mdbook-external-links 0.1.1 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" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pulldown-cmark-to-cmark v10.0.4
[INFO] [stderr]   Downloaded toml v0.5.10
[INFO] [stderr]   Downloaded topological-sort v0.2.2
[INFO] [stderr]   Downloaded notify-debouncer-mini v0.2.1
[INFO] [stderr]   Downloaded cxxbridge-flags v1.0.86
[INFO] [stderr]   Downloaded terminal_size v0.2.3
[INFO] [stderr]   Downloaded gitignore v1.0.7
[INFO] [stderr]   Downloaded pest_generator v2.5.3
[INFO] [stderr]   Downloaded pest_derive v2.5.3
[INFO] [stderr]   Downloaded parking_lot_core v0.9.6
[INFO] [stderr]   Downloaded io-lifetimes v1.0.4
[INFO] [stderr]   Downloaded cxxbridge-macro v1.0.86
[INFO] [stderr]   Downloaded pest v2.5.3
[INFO] [stderr]   Downloaded clap v4.1.1
[INFO] [stderr]   Downloaded warp v0.3.3
[INFO] [stderr]   Downloaded cxx v1.0.86
[INFO] [stderr]   Downloaded pulldown-cmark v0.9.2
[INFO] [stderr]   Downloaded cxx-build v1.0.86
[INFO] [stderr]   Downloaded clap_complete v4.1.0
[INFO] [stderr]   Downloaded elasticlunr-rs v3.0.1
[INFO] [stderr]   Downloaded mdbook v0.4.25
[INFO] [stderr]   Downloaded pest_meta v2.5.3
[INFO] [stderr]   Downloaded handlebars v4.3.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8d0a55d2137acc212b253dca56a67900aab041c72a42f35d7508a383ba125b18
[INFO] running `Command { std: "docker" "start" "-a" "8d0a55d2137acc212b253dca56a67900aab041c72a42f35d7508a383ba125b18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8d0a55d2137acc212b253dca56a67900aab041c72a42f35d7508a383ba125b18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8d0a55d2137acc212b253dca56a67900aab041c72a42f35d7508a383ba125b18", kill_on_drop: false }`
[INFO] [stdout] 8d0a55d2137acc212b253dca56a67900aab041c72a42f35d7508a383ba125b18
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f03a50076788886516b0584fac10c9dc4d03aaa73d99ac984a3fd71a5b126df5
[INFO] running `Command { std: "docker" "start" "-a" "f03a50076788886516b0584fac10c9dc4d03aaa73d99ac984a3fd71a5b126df5", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.50
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]     Checking itoa v1.0.5
[INFO] [stderr]     Checking bytes v1.3.0
[INFO] [stderr]     Checking once_cell v1.17.0
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling thiserror v1.0.38
[INFO] [stderr]    Compiling generic-array v0.14.6
[INFO] [stderr]    Compiling futures-core v0.3.25
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/proc-macro2-1.0.50/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 phf_shared v0.10.0
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[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 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f03a50076788886516b0584fac10c9dc4d03aaa73d99ac984a3fd71a5b126df5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f03a50076788886516b0584fac10c9dc4d03aaa73d99ac984a3fd71a5b126df5", kill_on_drop: false }`
[INFO] [stdout] f03a50076788886516b0584fac10c9dc4d03aaa73d99ac984a3fd71a5b126df5
