[INFO] fetching crate verto 0.7.13...
[INFO] testing verto-0.7.13 against try#b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b for pr-145330-1
[INFO] extracting crate verto 0.7.13 into /workspace/builds/worker-4-tc2/source
[INFO] removed /workspace/builds/worker-4-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate verto 0.7.13
[INFO] finished tweaking crates.io crate verto 0.7.13
[INFO] tweaked toml for crates.io crate verto 0.7.13 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate verto 0.7.13 on toolchain b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate verto 0.7.13 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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8a4d94faccfd9a0671c0ed387bc58f5e93be90d581e9424257563b838d028157
[INFO] running `Command { std: "docker" "start" "-a" "8a4d94faccfd9a0671c0ed387bc58f5e93be90d581e9424257563b838d028157", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8a4d94faccfd9a0671c0ed387bc58f5e93be90d581e9424257563b838d028157", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a4d94faccfd9a0671c0ed387bc58f5e93be90d581e9424257563b838d028157", kill_on_drop: false }`
[INFO] [stdout] 8a4d94faccfd9a0671c0ed387bc58f5e93be90d581e9424257563b838d028157
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+b6ae10aa7319b7ebb6c7b3331dd71a9d6c9c5b4b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3302bd578087150a2ea0ea5c4cfb8a143dd07e3ed80b4a890f8f449da028b9c3
[INFO] running `Command { std: "docker" "start" "-a" "3302bd578087150a2ea0ea5c4cfb8a143dd07e3ed80b4a890f8f449da028b9c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.138
[INFO] [stderr]    Compiling proc-macro2 v1.0.49
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling pkg-config v0.3.26
[INFO] [stderr]    Compiling serde v1.0.152
[INFO] [stderr]    Compiling once_cell v1.16.0
[INFO] [stderr]    Compiling regex-syntax v0.6.28
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling aho-corasick v0.7.20
[INFO] [stderr]    Compiling jobserver v0.1.25
[INFO] [stdout] error[E0635]: unknown feature `proc_macro_span_shrink`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/proc-macro2-1.0.49/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]    Compiling cc v1.0.78
[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" "3302bd578087150a2ea0ea5c4cfb8a143dd07e3ed80b4a890f8f449da028b9c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3302bd578087150a2ea0ea5c4cfb8a143dd07e3ed80b4a890f8f449da028b9c3", kill_on_drop: false }`
[INFO] [stdout] 3302bd578087150a2ea0ea5c4cfb8a143dd07e3ed80b4a890f8f449da028b9c3