[INFO] cloning repository https://github.com/glennw/project
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/glennw/project" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fglennw%2Fproject", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fglennw%2Fproject'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 42abc4f46abc34d90ce3f3f6628b096d25196053
[INFO] documenting glennw/project 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%2Fglennw%2Fproject" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/glennw/project 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/glennw/project
[INFO] finished tweaking git repo https://github.com/glennw/project
[INFO] tweaked toml for git repo https://github.com/glennw/project written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/glennw/project 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/glennw/featureA`
[INFO] [stderr]     Updating git repository `https://github.com/glennw/featureB`
[INFO] [stderr] error: the lock file /workspace/builds/worker-3/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating git repository `https://github.com/glennw/featureA`
[INFO] [stderr]     Updating git repository `https://github.com/glennw/featureB`
[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]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 9bc15597bf7cfd58b0d3df1a871b14515ffdc466c749b614c8ea737edd0fe5e0
[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" "9bc15597bf7cfd58b0d3df1a871b14515ffdc466c749b614c8ea737edd0fe5e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9bc15597bf7cfd58b0d3df1a871b14515ffdc466c749b614c8ea737edd0fe5e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9bc15597bf7cfd58b0d3df1a871b14515ffdc466c749b614c8ea737edd0fe5e0", kill_on_drop: false }`
[INFO] [stdout] 9bc15597bf7cfd58b0d3df1a871b14515ffdc466c749b614c8ea737edd0fe5e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] f3bcec6031e40921a523a3f17098875d5597cce5e4df31db3d5e9b6e3c878605
[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" "f3bcec6031e40921a523a3f17098875d5597cce5e4df31db3d5e9b6e3c878605", kill_on_drop: false }`
[INFO] [stderr]     Checking featureA v0.0.1 (https://github.com/glennw/featureA#c606c23e)
[INFO] [stderr]  Documenting project v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected identifier, found `"featureA"`
[INFO] [stdout]  --> src/main.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 | extern crate "featureA" as feature;
[INFO] [stdout]   |              ^^^^^^^^^^ expected identifier
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `project`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name project src/main.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="featureA"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern featureA=/opt/rustwide/target/debug/deps/libfeatureA-0e83c49d8fd5539e.rmeta --cap-lints=warn --crate-version 0.0.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "f3bcec6031e40921a523a3f17098875d5597cce5e4df31db3d5e9b6e3c878605", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3bcec6031e40921a523a3f17098875d5597cce5e4df31db3d5e9b6e3c878605", kill_on_drop: false }`
[INFO] [stdout] f3bcec6031e40921a523a3f17098875d5597cce5e4df31db3d5e9b6e3c878605