[INFO] cloning repository https://github.com/andrewbaxter/somewords
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/andrewbaxter/somewords" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrewbaxter%2Fsomewords", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrewbaxter%2Fsomewords'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f5ff98f26b4324f35d78f104501accbf2f929142
[INFO] checking andrewbaxter/somewords/f5ff98f26b4324f35d78f104501accbf2f929142 against master#ff086354c9fc93e1da1d2f4d255456624fbcd099 for pr-153513
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fandrewbaxter%2Fsomewords" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/andrewbaxter/somewords
[INFO] finished tweaking git repo https://github.com/andrewbaxter/somewords
[INFO] tweaked toml for git repo https://github.com/andrewbaxter/somewords written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/andrewbaxter/somewords on toolchain ff086354c9fc93e1da1d2f4d255456624fbcd099
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff086354c9fc93e1da1d2f4d255456624fbcd099" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/andrewbaxter/somewords 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" "+ff086354c9fc93e1da1d2f4d255456624fbcd099" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded io-close v0.3.7
[INFO] [stderr]   Downloaded gix-path v0.8.0
[INFO] [stderr]   Downloaded palette_derive v0.7.2
[INFO] [stderr]   Downloaded phf_macros v0.11.1
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[INFO] [stderr]   Downloaded basic-toml v0.1.2
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+ff086354c9fc93e1da1d2f4d255456624fbcd099" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f4bf629ee482b97f5f4d36f1215f02a7138b7e0ec08c3830ea80c31c871d12e
[INFO] running `Command { std: "docker" "start" "-a" "5f4bf629ee482b97f5f4d36f1215f02a7138b7e0ec08c3830ea80c31c871d12e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f4bf629ee482b97f5f4d36f1215f02a7138b7e0ec08c3830ea80c31c871d12e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f4bf629ee482b97f5f4d36f1215f02a7138b7e0ec08c3830ea80c31c871d12e", kill_on_drop: false }`
[INFO] [stdout] 5f4bf629ee482b97f5f4d36f1215f02a7138b7e0ec08c3830ea80c31c871d12e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+ff086354c9fc93e1da1d2f4d255456624fbcd099" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5714dcae41a9bbb0de50eeef3460dca5d8efd80bec85c620806b4385ef87ddf5
[INFO] running `Command { std: "docker" "start" "-a" "5714dcae41a9bbb0de50eeef3460dca5d8efd80bec85c620806b4385ef87ddf5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[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 thiserror v1.0.40
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling parking_lot_core v0.9.8
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling crossbeam-queue v0.3.8
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling lock_api v0.4.10
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking human_format v1.0.3
[INFO] [stderr]     Checking bstr v1.5.0
[INFO] [stderr]     Checking bytesize v1.2.0
[INFO] [stderr]     Checking sha1_smol v1.0.0
[INFO] [stderr]     Checking walkdir v2.3.3
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling rustix v0.37.19
[INFO] [stderr]     Checking linux-raw-sys v0.3.8
[INFO] [stderr]    Compiling time-core v0.1.1
[INFO] [stderr]     Checking num_threads v0.1.6
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking nom v7.1.3
[INFO] [stderr]     Checking home v0.5.5
[INFO] [stderr]    Compiling time-macros v0.2.9
[INFO] [stderr]    Compiling signal-hook v0.3.15
[INFO] [stderr]     Checking prodash v23.1.2
[INFO] [stderr]     Checking bitflags v2.3.1
[INFO] [stderr]     Checking flate2 v1.0.26
[INFO] [stderr]     Checking fastrand v1.9.0
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.59/src/lib.rs:92:30
[INFO] [stdout]    |
[INFO] [stdout] 92 |     feature(proc_macro_span, proc_macro_span_shrink)
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] 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 unicase v2.6.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]     Checking hashbrown v0.13.2
[INFO] [stderr]    Compiling ahash v0.8.3
[INFO] [stderr]     Checking gix-utils v0.1.1
[INFO] [stderr]     Checking percent-encoding v2.3.0
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]     Checking unicode-bom v2.0.2
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr]     Checking crossbeam-deque v0.8.3
[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" "5714dcae41a9bbb0de50eeef3460dca5d8efd80bec85c620806b4385ef87ddf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5714dcae41a9bbb0de50eeef3460dca5d8efd80bec85c620806b4385ef87ddf5", kill_on_drop: false }`
[INFO] [stdout] 5714dcae41a9bbb0de50eeef3460dca5d8efd80bec85c620806b4385ef87ddf5