[INFO] cloning repository https://github.com/exoticorn/pngeq
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/exoticorn/pngeq" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexoticorn%2Fpngeq", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexoticorn%2Fpngeq'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 374001a7e62f9fbba78ac8588bc5cf2d53e40746
[INFO] documenting exoticorn/pngeq against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fexoticorn%2Fpngeq" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/exoticorn/pngeq on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/exoticorn/pngeq
[INFO] finished tweaking git repo https://github.com/exoticorn/pngeq
[INFO] tweaked toml for git repo https://github.com/exoticorn/pngeq written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/exoticorn/pngeq already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded exoquant v0.2.0
[INFO] [stderr]   Downloaded unicode-segmentation v0.1.2
[INFO] [stderr]   Downloaded strsim v0.5.1
[INFO] [stderr]   Downloaded c_vec v1.0.12
[INFO] [stderr]   Downloaded ansi_term v0.8.0
[INFO] [stderr]   Downloaded term_size v0.1.1
[INFO] [stderr]   Downloaded rgb v0.5.0
[INFO] [stderr]   Downloaded lodepng v0.8.1
[INFO] [stderr]   Downloaded clap v2.11.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0030706bd6cc4c16410e1a490cc15d125d53a25df39f9dfc21fd3396f84e8f4a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0030706bd6cc4c16410e1a490cc15d125d53a25df39f9dfc21fd3396f84e8f4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0030706bd6cc4c16410e1a490cc15d125d53a25df39f9dfc21fd3396f84e8f4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0030706bd6cc4c16410e1a490cc15d125d53a25df39f9dfc21fd3396f84e8f4a", kill_on_drop: false }`
[INFO] [stdout] 0030706bd6cc4c16410e1a490cc15d125d53a25df39f9dfc21fd3396f84e8f4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c66e7c4496c18863a89bdce9d89d0548bccd1061c1322b7b7d4663d333e97cf4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c66e7c4496c18863a89bdce9d89d0548bccd1061c1322b7b7d4663d333e97cf4", kill_on_drop: false }`
[INFO] [stderr]    Compiling lodepng v0.8.1
[INFO] [stderr]     Checking strsim v0.5.1
[INFO] [stderr]     Checking c_vec v1.0.12
[INFO] [stderr]     Checking rgb v0.5.0
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking unicode-width v0.1.3
[INFO] [stderr]     Checking ansi_term v0.8.0
[INFO] [stderr]     Checking vec_map v0.6.0
[INFO] [stderr]     Checking unicode-segmentation v0.1.2
[INFO] [stderr]     Checking exoquant v0.2.0
[INFO] [stderr]     Checking term_size v0.1.1
[INFO] [stderr]     Checking clap v2.11.0
[INFO] [stdout] error: missing fragment specifier
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/clap-2.11.0/src/macros.rs:506:41
[INFO] [stdout]     |
[INFO] [stdout] 506 |     (@arg ($arg:expr) $modes:tt !$ident $($tail:tt)*) => {
[INFO] [stdout]     |                                         ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `clap`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "c66e7c4496c18863a89bdce9d89d0548bccd1061c1322b7b7d4663d333e97cf4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c66e7c4496c18863a89bdce9d89d0548bccd1061c1322b7b7d4663d333e97cf4", kill_on_drop: false }`
[INFO] [stdout] c66e7c4496c18863a89bdce9d89d0548bccd1061c1322b7b7d4663d333e97cf4