[INFO] cloning repository https://github.com/vignkri/zmq-rs-cuckoo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vignkri/zmq-rs-cuckoo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvignkri%2Fzmq-rs-cuckoo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvignkri%2Fzmq-rs-cuckoo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 807b337e094fed6fdbe37f7d2fa3bfe88f523a42
[INFO] documenting vignkri/zmq-rs-cuckoo against try#a394c9cd9ec93787f09a7ac445b14cc674a94549 for pr-151918
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvignkri%2Fzmq-rs-cuckoo" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vignkri/zmq-rs-cuckoo
[INFO] finished tweaking git repo https://github.com/vignkri/zmq-rs-cuckoo
[INFO] tweaked toml for git repo https://github.com/vignkri/zmq-rs-cuckoo written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vignkri/zmq-rs-cuckoo on toolchain a394c9cd9ec93787f09a7ac445b14cc674a94549
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vignkri/zmq-rs-cuckoo 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" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dircpy v0.3.14
[INFO] [stderr]   Downloaded zmq-sys v0.12.0
[INFO] [stderr]   Downloaded zmq v0.10.0
[INFO] [stderr]   Downloaded cfg-expr v0.15.2
[INFO] [stderr]   Downloaded system-deps v6.1.0
[INFO] [stderr]   Downloaded serde_spanned v0.6.2
[INFO] [stderr]   Downloaded target-lexicon v0.12.7
[INFO] [stderr]   Downloaded jwalk v0.6.2
[INFO] [stderr]   Downloaded toml v0.7.4
[INFO] [stderr]   Downloaded zeromq-src v0.2.5+4.3.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8e2dbfade8d11b70cd98422ff7d904ecf798d200d7dd33ca5280fa08551d5fc0
[INFO] running `Command { std: "docker" "start" "-a" "8e2dbfade8d11b70cd98422ff7d904ecf798d200d7dd33ca5280fa08551d5fc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8e2dbfade8d11b70cd98422ff7d904ecf798d200d7dd33ca5280fa08551d5fc0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e2dbfade8d11b70cd98422ff7d904ecf798d200d7dd33ca5280fa08551d5fc0", kill_on_drop: false }`
[INFO] [stdout] 8e2dbfade8d11b70cd98422ff7d904ecf798d200d7dd33ca5280fa08551d5fc0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:29356a839a4d14451438f794ce8414e707d72405f44418718d724d22562fe786" "/opt/rustwide/cargo-home/bin/cargo" "+a394c9cd9ec93787f09a7ac445b14cc674a94549" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4326c94356e37249a1d22e7533dfd64aa42671f2a76ce2e8f8b4fad366fe62aa
[INFO] running `Command { std: "docker" "start" "-a" "4326c94356e37249a1d22e7533dfd64aa42671f2a76ce2e8f8b4fad366fe62aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.144
[INFO] [stderr]    Compiling memoffset v0.8.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.14
[INFO] [stderr]    Compiling crossbeam-utils v0.8.15
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling crossbeam-queue v0.3.8
[INFO] [stderr]    Compiling serde v1.0.163
[INFO] [stderr]    Compiling proc-macro2 v1.0.59
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling log v0.4.18
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling target-lexicon v0.12.7
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling winnow v0.4.6
[INFO] [stderr]    Compiling smallvec v1.10.0
[INFO] [stderr]    Compiling version-compare v0.1.1
[INFO] [stderr]    Compiling walkdir v2.3.3
[INFO] [stderr]    Compiling pkg-config v0.3.27
[INFO] [stderr]    Compiling tokio v1.28.2
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]    Compiling zmq v0.10.0
[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 anyhow v1.0.71
[INFO] [stderr]    Compiling crossbeam-channel v0.5.8
[INFO] [stderr]     Checking tracing-log v0.1.3
[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" "4326c94356e37249a1d22e7533dfd64aa42671f2a76ce2e8f8b4fad366fe62aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4326c94356e37249a1d22e7533dfd64aa42671f2a76ce2e8f8b4fad366fe62aa", kill_on_drop: false }`
[INFO] [stdout] 4326c94356e37249a1d22e7533dfd64aa42671f2a76ce2e8f8b4fad366fe62aa