[INFO] cloning repository https://github.com/tureus/avvy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tureus/avvy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftureus%2Favvy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftureus%2Favvy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4d1ce7db5498c45205aa1a4fdd56fb1f4f4f79f1
[INFO] documenting tureus/avvy against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftureus%2Favvy" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tureus/avvy on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tureus/avvy
[INFO] finished tweaking git repo https://github.com/tureus/avvy
[INFO] tweaked toml for git repo https://github.com/tureus/avvy written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/tureus/avvy already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 78a37940a219b8b8c59fafd3d67eec3abc8c666fbb9f67bd6e637f6a158dfe52
[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" "78a37940a219b8b8c59fafd3d67eec3abc8c666fbb9f67bd6e637f6a158dfe52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78a37940a219b8b8c59fafd3d67eec3abc8c666fbb9f67bd6e637f6a158dfe52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78a37940a219b8b8c59fafd3d67eec3abc8c666fbb9f67bd6e637f6a158dfe52", kill_on_drop: false }`
[INFO] [stdout] 78a37940a219b8b8c59fafd3d67eec3abc8c666fbb9f67bd6e637f6a158dfe52
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e6a256ca751564967e6ad01d02a34c67bc34028515f2aab23e7cb387ce9a0484
[INFO] running `Command { std: "docker" "start" "-a" "e6a256ca751564967e6ad01d02a34c67bc34028515f2aab23e7cb387ce9a0484", kill_on_drop: false }`
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking smallvec v0.6.3
[INFO] [stderr]     Checking env_logger v0.5.11
[INFO] [stderr]  Documenting avvy 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(nll, test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `avvy`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name avvy src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-482a62d68c65274c.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-bdaba254e5dc76eb.rmeta --extern fnv=/opt/rustwide/target/debug/deps/libfnv-37211449d6f82f70.rmeta --extern integer_encoding=/opt/rustwide/target/debug/deps/libinteger_encoding-82b20ff10d9353a2.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-2749694bd4433225.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-6de1ef416a3f7d91.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-c7316ba3eac3f64c.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-3223391606d97819.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-7b2a7d8b22eca8fa.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "e6a256ca751564967e6ad01d02a34c67bc34028515f2aab23e7cb387ce9a0484", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6a256ca751564967e6ad01d02a34c67bc34028515f2aab23e7cb387ce9a0484", kill_on_drop: false }`
[INFO] [stdout] e6a256ca751564967e6ad01d02a34c67bc34028515f2aab23e7cb387ce9a0484
