[INFO] fetching crate unreal-doc 1.0.9...
[INFO] testing unreal-doc-1.0.9 against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] extracting crate unreal-doc 1.0.9 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate unreal-doc 1.0.9
[INFO] finished tweaking crates.io crate unreal-doc 1.0.9
[INFO] tweaked toml for crates.io crate unreal-doc 1.0.9 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate unreal-doc 1.0.9 on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate unreal-doc 1.0.9 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" "+caccb4d0368bd918ef6668af8e13834d07040417" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded toml_datetime v0.6.2
[INFO] [stderr]   Downloaded pest_derive v2.6.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.59
[INFO] [stderr]   Downloaded pest_generator v2.6.0
[INFO] [stderr]   Downloaded aho-corasick v1.0.2
[INFO] [stderr]   Downloaded pest_meta v2.6.0
[INFO] [stderr]   Downloaded pest v2.6.0
[INFO] [stderr]   Downloaded serde v1.0.163
[INFO] [stderr]   Downloaded winnow v0.4.6
[INFO] [stderr]   Downloaded toml v0.7.4
[INFO] [stderr]   Downloaded toml_edit v0.19.10
[INFO] [stderr]   Downloaded serde_spanned v0.6.2
[INFO] [stderr]   Downloaded serde_derive v1.0.163
[INFO] [stderr]   Downloaded libc v0.2.146
[INFO] [stderr]   Downloaded os_str_bytes v6.5.0
[INFO] [stderr]   Downloaded cpufeatures v0.2.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 31d964a08a8d44b77edf9c397c841d842a1f53bdb42b662ba1a7c778e7d27064
[INFO] running `Command { std: "docker" "start" "-a" "31d964a08a8d44b77edf9c397c841d842a1f53bdb42b662ba1a7c778e7d27064", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "31d964a08a8d44b77edf9c397c841d842a1f53bdb42b662ba1a7c778e7d27064", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31d964a08a8d44b77edf9c397c841d842a1f53bdb42b662ba1a7c778e7d27064", kill_on_drop: false }`
[INFO] [stdout] 31d964a08a8d44b77edf9c397c841d842a1f53bdb42b662ba1a7c778e7d27064
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a71c5b1d36a75d550e7567b948d9af0d4de7229f18d0171f59f5796e0e0964d2
[INFO] running `Command { std: "docker" "start" "-a" "a71c5b1d36a75d550e7567b948d9af0d4de7229f18d0171f59f5796e0e0964d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.59
[INFO] [stderr]    Compiling unicode-ident v1.0.9
[INFO] [stderr]    Compiling quote v1.0.28
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling thiserror v1.0.40
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling ucd-trie v0.1.5
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling winnow v0.4.6
[INFO] [stderr]    Compiling os_str_bytes v6.5.0
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling termcolor v1.2.0
[INFO] [stderr]    Compiling textwrap v0.16.0
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling aho-corasick v1.0.2
[INFO] [stderr]    Compiling regex-syntax v0.7.2
[INFO] [stderr]    Compiling itoa v1.0.6
[INFO] [stderr]    Compiling ryu v1.0.13
[INFO] [stderr]    Compiling clap_lex v0.2.4
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.59/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] [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" "a71c5b1d36a75d550e7567b948d9af0d4de7229f18d0171f59f5796e0e0964d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a71c5b1d36a75d550e7567b948d9af0d4de7229f18d0171f59f5796e0e0964d2", kill_on_drop: false }`
[INFO] [stdout] a71c5b1d36a75d550e7567b948d9af0d4de7229f18d0171f59f5796e0e0964d2