[INFO] updating cached repository kesselborn/rsdocs2docset
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/kesselborn/rsdocs2docset
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/kesselborn/rsdocs2docset" "work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/kesselborn/rsdocs2docset"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/kesselborn/rsdocs2docset'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/kesselborn/rsdocs2docset" "work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/kesselborn/rsdocs2docset"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/kesselborn/rsdocs2docset'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f4290060d73125fbe5f058aa2b56f2903a7dd670
[INFO] sha for GitHub repo kesselborn/rsdocs2docset: f4290060d73125fbe5f058aa2b56f2903a7dd670
[INFO] validating manifest of kesselborn/rsdocs2docset on toolchain master#1891bfa80364eead426517c68de6947b7692e2de
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of kesselborn/rsdocs2docset on toolchain try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing kesselborn/rsdocs2docset
[INFO] finished frobbing kesselborn/rsdocs2docset
[INFO] frobbed toml for kesselborn/rsdocs2docset written to work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/kesselborn/rsdocs2docset/Cargo.toml
[INFO] started frobbing kesselborn/rsdocs2docset
[INFO] finished frobbing kesselborn/rsdocs2docset
[INFO] frobbed toml for kesselborn/rsdocs2docset written to work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/kesselborn/rsdocs2docset/Cargo.toml
[INFO] crate kesselborn/rsdocs2docset already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking kesselborn/rsdocs2docset against try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-7/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/kesselborn/rsdocs2docset:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b0b9a9a080326f3fd45e58aad2a6a6df00465938c2d305ea3f6a4cdda207e974
[INFO] running `"docker" "start" "-a" "b0b9a9a080326f3fd45e58aad2a6a6df00465938c2d305ea3f6a4cdda207e974"`
[INFO] [stderr]    Compiling libc v0.2.19
[INFO] [stderr]     Checking serde v0.8.22
[INFO] [stderr]    Compiling rustc-serialize v0.3.22
[INFO] [stderr]     Checking mac v0.0.2
[INFO] [stderr]     Checking phf_shared v0.7.20
[INFO] [stderr]    Compiling sqlite3-src v0.2.4
[INFO] [stderr]    Compiling syn v0.10.6
[INFO] [stderr]     Checking utf-8 v0.6.0
[INFO] [stderr]     Checking term_size v0.2.1
[INFO] [stderr]     Checking phf v0.7.20
[INFO] [stderr]     Checking futf v0.1.2
[INFO] [stderr]     Checking url v1.2.4
[INFO] [stderr]     Checking clap v2.19.3
[INFO] [stderr]     Checking tendril v0.2.3
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]     Checking sqlite3-sys v0.11.1
[INFO] [stderr]     Checking sqlite v0.23.2
[INFO] [stderr] warning[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.2.4/src/form_urlencoded.rs:246:40
[INFO] [stderr]     |
[INFO] [stderr] 244 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 245 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 246 |     fn finish(self) -> &'a mut ::Url { self.url }
[INFO] [stderr]     |                                        ^^^^^^^^ - here, drop of `self` needs exclusive access to `*self.url`, because the type `UrlQuery<'_>` implements the `Drop` trait
[INFO] [stderr]     |                                        |
[INFO] [stderr]     |                                        returning this value requires that `*self.url` is borrowed for `'a`
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr] 
[INFO] [stderr]    Compiling phf_generator v0.7.20
[INFO] [stderr]    Compiling string_cache_codegen v0.3.1
[INFO] [stderr]    Compiling phf_codegen v0.7.20
[INFO] [stderr]    Compiling string_cache v0.3.0
[INFO] [stderr]    Compiling html5ever-atoms v0.1.3
[INFO] [stderr]    Compiling html5ever v0.12.1
[INFO] [stderr]     Checking rsdocs2docset v0.4.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/dom/manipulator.rs:6:23
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn add_dash_links(mut dom: &mut RcDom, entries: &[Option<Entry>]) {
[INFO] [stderr]   |                       ----^^^
[INFO] [stderr]   |                       |
[INFO] [stderr]   |                       help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/dom/manipulator.rs:6:23
[INFO] [stderr]   |
[INFO] [stderr] 6 | pub fn add_dash_links(mut dom: &mut RcDom, entries: &[Option<Entry>]) {
[INFO] [stderr]   |                       ----^^^
[INFO] [stderr]   |                       |
[INFO] [stderr]   |                       help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.57s
[INFO] running `"docker" "inspect" "b0b9a9a080326f3fd45e58aad2a6a6df00465938c2d305ea3f6a4cdda207e974"`
[INFO] running `"docker" "rm" "-f" "b0b9a9a080326f3fd45e58aad2a6a6df00465938c2d305ea3f6a4cdda207e974"`
[INFO] [stdout] b0b9a9a080326f3fd45e58aad2a6a6df00465938c2d305ea3f6a4cdda207e974