[INFO] cloning repository https://github.com/alextanhongpin/rust-web
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alextanhongpin/rust-web" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falextanhongpin%2Frust-web", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falextanhongpin%2Frust-web'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab9a35d2a37c90935eae573da137e90b08d2a788
[INFO] documenting alextanhongpin/rust-web 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%2Falextanhongpin%2Frust-web" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alextanhongpin/rust-web 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/alextanhongpin/rust-web
[INFO] finished tweaking git repo https://github.com/alextanhongpin/rust-web
[INFO] tweaked toml for git repo https://github.com/alextanhongpin/rust-web written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/alextanhongpin/rust-web 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 error v0.1.9
[INFO] [stderr]   Downloaded num_cpus v1.6.2
[INFO] [stderr]   Downloaded version_check v0.1.3
[INFO] [stderr]   Downloaded route-recognizer v0.1.12
[INFO] [stderr]   Downloaded idna v0.1.4
[INFO] [stderr]   Downloaded time v0.1.38
[INFO] [stderr]   Downloaded hyper v0.10.13
[INFO] [stderr]   Downloaded unicode-normalization v0.1.5
[INFO] [stderr]   Downloaded modifier v0.1.0
[INFO] [stderr]   Downloaded libc v0.2.31
[INFO] [stderr]   Downloaded byteorder v1.1.0
[INFO] [stderr]   Downloaded redox_syscall v0.1.31
[INFO] [stderr]   Downloaded plugin v0.2.6
[INFO] [stderr]   Downloaded typemap v0.3.3
[INFO] [stderr]   Downloaded iron v0.5.1
[INFO] [stderr]   Downloaded url v1.5.1
[INFO] [stderr]   Downloaded router v0.5.1
[INFO] [stderr]   Downloaded unsafe-any v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 50a3a0fef2c59aec93fd6ff583452b6f8eaf9d1a69ecb02c5988c1d19d201edd
[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" "50a3a0fef2c59aec93fd6ff583452b6f8eaf9d1a69ecb02c5988c1d19d201edd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50a3a0fef2c59aec93fd6ff583452b6f8eaf9d1a69ecb02c5988c1d19d201edd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50a3a0fef2c59aec93fd6ff583452b6f8eaf9d1a69ecb02c5988c1d19d201edd", kill_on_drop: false }`
[INFO] [stdout] 50a3a0fef2c59aec93fd6ff583452b6f8eaf9d1a69ecb02c5988c1d19d201edd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 679c7b3c055be26a42a5b0c64b5489e5d1b14993c7f97af32439e17253fe6076
[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" "679c7b3c055be26a42a5b0c64b5489e5d1b14993c7f97af32439e17253fe6076", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking libc v0.2.31
[INFO] [stderr]     Checking route-recognizer v0.1.12
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking url v1.5.1
[INFO] [stdout] error[E0713]: borrow may still be in use when destructor runs
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.5.1/src/form_urlencoded.rs:251:40
[INFO] [stdout]     |
[INFO] [stdout] 249 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stdout]     |      -- lifetime `'a` defined here
[INFO] [stdout] 250 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stdout] 251 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stdout]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stdout]     |                                        |
[INFO] [stdout]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[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 E0713`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `url`.
[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" "679c7b3c055be26a42a5b0c64b5489e5d1b14993c7f97af32439e17253fe6076", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "679c7b3c055be26a42a5b0c64b5489e5d1b14993c7f97af32439e17253fe6076", kill_on_drop: false }`
[INFO] [stdout] 679c7b3c055be26a42a5b0c64b5489e5d1b14993c7f97af32439e17253fe6076