[INFO] cloning repository https://github.com/bazaah/yarls
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/bazaah/yarls" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbazaah%2Fyarls", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbazaah%2Fyarls'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2d38c9af37fe574885a6078b536446add3cea0d9
[INFO] documenting bazaah/yarls against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbazaah%2Fyarls" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bazaah/yarls on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/bazaah/yarls
[INFO] finished tweaking git repo https://github.com/bazaah/yarls
[INFO] tweaked toml for git repo https://github.com/bazaah/yarls written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/bazaah/yarls already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2fef95d56f77d0d965c4a6a281a41ee2b772160837daec2f2cd2726a2115dac
[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" "a2fef95d56f77d0d965c4a6a281a41ee2b772160837daec2f2cd2726a2115dac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2fef95d56f77d0d965c4a6a281a41ee2b772160837daec2f2cd2726a2115dac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2fef95d56f77d0d965c4a6a281a41ee2b772160837daec2f2cd2726a2115dac", kill_on_drop: false }`
[INFO] [stdout] a2fef95d56f77d0d965c4a6a281a41ee2b772160837daec2f2cd2726a2115dac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4862beb491dec50f59a9552342f75df664ff282fbd23e5e13c88e89ac8e11ad6
[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" "4862beb491dec50f59a9552342f75df664ff282fbd23e5e13c88e89ac8e11ad6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v0.15.30
[INFO] [stderr]    Compiling cc v1.0.34
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling itoa v0.4.3
[INFO] [stderr]     Checking ego-tree v0.6.0
[INFO] [stderr]     Checking tokio-sync v0.1.4
[INFO] [stderr]     Checking dtoa-short v0.3.2
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]    Compiling serde v1.0.89
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking nom v4.2.3
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking serde_urlencoded v0.5.4
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking arrayvec v0.4.10
[INFO] [stderr]     Checking servo_arc v0.1.1
[INFO] [stderr]     Checking h2 v0.1.17
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking tendril v0.4.1
[INFO] [stderr]     Checking crossbeam-epoch v0.7.1
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]    Compiling openssl-sys v0.9.43
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.2.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.1
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-threadpool v0.1.13
[INFO] [stderr]     Checking flate2 v1.0.7
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling openssl v0.10.20
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.6
[INFO] [stderr]    Compiling selectors v0.20.0
[INFO] [stderr]     Checking tokio v0.1.18
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]     Checking hyper v0.12.25
[INFO] [stderr]     Checking hyper-tls v0.3.2
[INFO] [stderr]    Compiling serde_json v1.0.39
[INFO] [stderr]     Checking reqwest v0.9.13
[INFO] [stderr]    Compiling cssparser v0.24.1
[INFO] [stderr]    Compiling serde_derive v1.0.89
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling cssparser-macros v0.3.5
[INFO] [stderr]    Compiling strum_macros v0.15.0
[INFO] [stdout] error[E0506]: cannot assign to `self.input.cached_token` because it is borrowed
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cssparser-0.24.1/src/parser.rs:572:17
[INFO] [stdout]     |
[INFO] [stdout] 547 |     pub fn next_including_whitespace_and_comments(&mut self) -> Result<&Token<'i>, BasicParseError<'i>> {
[INFO] [stdout]     |                                                   - let's call the lifetime of this reference `'1`
[INFO] [stdout] ...
[INFO] [stdout] 560 |             Some(ref cached_token)
[INFO] [stdout]     |                  ---------------- borrow of `self.input.cached_token` occurs here
[INFO] [stdout] ...
[INFO] [stdout] 572 |                 self.input.cached_token = Some(CachedToken {
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^ assignment to borrowed `self.input.cached_token` occurs here
[INFO] [stdout] ...
[INFO] [stdout] 584 |         Ok(token)
[INFO] [stdout]     |         --------- returning this value requires that `self.input.cached_token.0` is borrowed for `'1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0506`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cssparser`.
[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" "4862beb491dec50f59a9552342f75df664ff282fbd23e5e13c88e89ac8e11ad6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4862beb491dec50f59a9552342f75df664ff282fbd23e5e13c88e89ac8e11ad6", kill_on_drop: false }`
[INFO] [stdout] 4862beb491dec50f59a9552342f75df664ff282fbd23e5e13c88e89ac8e11ad6