[INFO] cloning repository https://github.com/quininer/epub2txt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/quininer/epub2txt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquininer%2Fepub2txt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquininer%2Fepub2txt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2ec009985997ace42fdff7eec67787bc5caae83e
[INFO] documenting quininer/epub2txt 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%2Fquininer%2Fepub2txt" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quininer/epub2txt 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/quininer/epub2txt
[INFO] finished tweaking git repo https://github.com/quininer/epub2txt
[INFO] tweaked toml for git repo https://github.com/quininer/epub2txt written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/quininer/epub2txt 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded miniz_oxide_c_api v0.1.2
[INFO] [stderr]   Downloaded utf-8 v0.7.1
[INFO] [stderr]   Downloaded kuchiki v0.6.0
[INFO] [stderr]   Downloaded zip v0.3.0
[INFO] [stderr]   Downloaded procedural-masquerade v0.1.5
[INFO] [stderr]   Downloaded string_cache v0.6.2
[INFO] [stderr]   Downloaded cssparser-macros v0.3.0
[INFO] [stderr]   Downloaded selectors v0.18.0
[INFO] [stderr]   Downloaded clap v2.29.2
[INFO] [stderr]   Downloaded markup5ever v0.5.0
[INFO] [stderr]   Downloaded cssparser v0.13.7
[INFO] [stderr]   Downloaded miniz_oxide v0.1.2
[INFO] [stderr]   Downloaded html5ever v0.20.0
[INFO] [stderr]   Downloaded smallvec v0.3.3
[INFO] [stderr]   Downloaded string_cache_codegen v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 87c5715bb1bb8f8e17c862e6c4e9d350ef19240971a38726a7db0211082fbc55
[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" "87c5715bb1bb8f8e17c862e6c4e9d350ef19240971a38726a7db0211082fbc55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "87c5715bb1bb8f8e17c862e6c4e9d350ef19240971a38726a7db0211082fbc55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "87c5715bb1bb8f8e17c862e6c4e9d350ef19240971a38726a7db0211082fbc55", kill_on_drop: false }`
[INFO] [stdout] 87c5715bb1bb8f8e17c862e6c4e9d350ef19240971a38726a7db0211082fbc55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 7c7d61d02c4fe688c810d337e1620ce54650e6290f053f956f26ddb58e510e5f
[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" "7c7d61d02c4fe688c810d337e1620ce54650e6290f053f956f26ddb58e510e5f", 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.36
[INFO] [stderr]    Compiling cc v1.0.4
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling build_const v0.2.0
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]    Compiling procedural-masquerade v0.1.5
[INFO] [stderr]     Checking serde v1.0.27
[INFO] [stderr]     Checking smallvec v0.3.3
[INFO] [stderr]     Checking ansi_term v0.10.2
[INFO] [stderr]     Checking podio v0.1.6
[INFO] [stderr]    Compiling phf_shared v0.7.21
[INFO] [stderr]     Checking log v0.4.1
[INFO] [stderr]     Checking unreachable v0.1.1
[INFO] [stderr]     Checking utf-8 v0.7.1
[INFO] [stderr]     Checking textwrap v0.9.0
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking debug_unreachable v0.1.1
[INFO] [stderr]     Checking phf v0.7.21
[INFO] [stderr]     Checking url v1.6.0
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking futf v0.1.3
[INFO] [stderr]    Compiling crc v1.7.0
[INFO] [stderr]     Checking tendril v0.4.0
[INFO] [stderr]     Checking miniz_oxide v0.1.2
[INFO] [stderr]     Checking time v0.1.39
[INFO] [stderr]     Checking atty v0.2.6
[INFO] [stderr]     Checking clap v2.29.2
[INFO] [stderr]    Compiling rand v0.3.20
[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-1.6.0/src/form_urlencoded.rs:261:40
[INFO] [stdout]     |
[INFO] [stdout] 259 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stdout]     |      -- lifetime `'a` defined here
[INFO] [stdout] 260 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stdout] 261 |     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" "7c7d61d02c4fe688c810d337e1620ce54650e6290f053f956f26ddb58e510e5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c7d61d02c4fe688c810d337e1620ce54650e6290f053f956f26ddb58e510e5f", kill_on_drop: false }`
[INFO] [stdout] 7c7d61d02c4fe688c810d337e1620ce54650e6290f053f956f26ddb58e510e5f