[INFO] cloning repository https://github.com/PanQL/ppm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PanQL/ppm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPanQL%2Fppm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPanQL%2Fppm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8340847ac13cb4f38d39cfd8e565b6a0a59d330
[INFO] documenting PanQL/ppm against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPanQL%2Fppm" "/workspace/builds/worker-25/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-25/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PanQL/ppm on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-25/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/PanQL/ppm
[INFO] finished tweaking git repo https://github.com/PanQL/ppm
[INFO] tweaked toml for git repo https://github.com/PanQL/ppm written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate git repo https://github.com/PanQL/ppm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rgb v0.8.13
[INFO] [stderr]   Downloaded kdtree v0.5.1
[INFO] [stderr]   Downloaded lodepng v2.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d435d8489e03377d06e4b86fd9f9d3ee6d41cf5668abe0f71705de5d1045c379
[INFO] running `Command { std: "docker" "start" "-a" "d435d8489e03377d06e4b86fd9f9d3ee6d41cf5668abe0f71705de5d1045c379", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d435d8489e03377d06e4b86fd9f9d3ee6d41cf5668abe0f71705de5d1045c379", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d435d8489e03377d06e4b86fd9f9d3ee6d41cf5668abe0f71705de5d1045c379", kill_on_drop: false }`
[INFO] [stdout] d435d8489e03377d06e4b86fd9f9d3ee6d41cf5668abe0f71705de5d1045c379
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2be4ad81b36810b55bb9c310c65b4bfc3ec8caec647d311c1ba1c2cae06b443c
[INFO] running `Command { std: "docker" "start" "-a" "2be4ad81b36810b55bb9c310c65b4bfc3ec8caec647d311c1ba1c2cae06b443c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libm v0.1.4
[INFO] [stderr]    Compiling regex v1.1.6
[INFO] [stderr]     Checking lazy_static v1.3.0
[INFO] [stderr]     Checking rawpointer v0.1.0
[INFO] [stderr]     Checking utf8-ranges v1.0.2
[INFO] [stderr]     Checking rgb v0.8.13
[INFO] [stderr]     Checking termcolor v1.0.4
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]     Checking regex-syntax v0.6.6
[INFO] [stderr]     Checking aho-corasick v0.7.3
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking matrixmultiply v0.2.2
[INFO] [stderr]     Checking lodepng v2.4.2
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking kdtree v0.5.1
[INFO] [stderr]     Checking alga v0.9.1
[INFO] [stderr]     Checking env_logger v0.6.1
[INFO] [stderr]     Checking nalgebra v0.18.0
[INFO] [stderr]  Documenting ppm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(clamp)]
[INFO] [stdout]   |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(vec_resize_default)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `vec_resize_default`
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(vec_resize_default)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `ppm`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name ppm src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=c868a8e3a811fc8a -L dependency=/opt/rustwide/target/debug/deps --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-24464e62e5dc9841.rmeta --extern kdtree=/opt/rustwide/target/debug/deps/libkdtree-7a6a9f4df8fb67a6.rmeta --extern lodepng=/opt/rustwide/target/debug/deps/liblodepng-9b419ee951904023.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-b63086a2318e9821.rmeta --extern nalgebra=/opt/rustwide/target/debug/deps/libnalgebra-1909f7a973a2d33c.rmeta --extern num_traits=/opt/rustwide/target/debug/deps/libnum_traits-07abe3ffaaa8f58e.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-aad4ace0799aaf13.rmeta --extern rgb=/opt/rustwide/target/debug/deps/librgb-69121e0e85a039c7.rmeta --extern spin=/opt/rustwide/target/debug/deps/libspin-ec5c0d9f103b2cea.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "2be4ad81b36810b55bb9c310c65b4bfc3ec8caec647d311c1ba1c2cae06b443c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2be4ad81b36810b55bb9c310c65b4bfc3ec8caec647d311c1ba1c2cae06b443c", kill_on_drop: false }`
[INFO] [stdout] 2be4ad81b36810b55bb9c310c65b4bfc3ec8caec647d311c1ba1c2cae06b443c