[INFO] updating cached repository yochidros/example_scraper
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/yochidros/example_scraper
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/yochidros/example_scraper" "work/ex/beta-1.38-1/sources/1.37.0/gh/yochidros/example_scraper"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/yochidros/example_scraper'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/yochidros/example_scraper" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yochidros/example_scraper"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yochidros/example_scraper'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 6f7234438278c03f2c764ac7aaec3214bf7a2a45
[INFO] sha for GitHub repo yochidros/example_scraper: 6f7234438278c03f2c764ac7aaec3214bf7a2a45
[INFO] validating manifest of yochidros/example_scraper on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of yochidros/example_scraper on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing yochidros/example_scraper
[INFO] finished frobbing yochidros/example_scraper
[INFO] frobbed toml for yochidros/example_scraper written to work/ex/beta-1.38-1/sources/1.37.0/gh/yochidros/example_scraper/Cargo.toml
[INFO] started frobbing yochidros/example_scraper
[INFO] finished frobbing yochidros/example_scraper
[INFO] frobbed toml for yochidros/example_scraper written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yochidros/example_scraper/Cargo.toml
[INFO] crate yochidros/example_scraper already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing yochidros/example_scraper against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/yochidros/example_scraper:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] c8a08ae3b0488d39b03a1928c2eda73cc1ca0babe52116fbb8358a9dc46222f9
[INFO] running `"docker" "start" "-a" "c8a08ae3b0488d39b03a1928c2eda73cc1ca0babe52116fbb8358a9dc46222f9"`
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling cc v1.0.15
[INFO] [stderr]    Compiling serde v1.0.55
[INFO] [stderr]    Compiling procedural-masquerade v0.1.5
[INFO] [stderr]    Compiling utf-8 v0.7.2
[INFO] [stderr]    Compiling ego-tree v0.3.0
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling encoding_rs v0.7.2
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling relay v0.1.1
[INFO] [stderr]    Compiling dtoa-short v0.3.2
[INFO] [stderr]    Compiling base64 v0.9.1
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling servo_arc v0.1.1
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling bytes v0.4.7
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.1
[INFO] [stderr]    Compiling syn v0.13.10
[INFO] [stderr]    Compiling futf v0.1.3
[INFO] [stderr]    Compiling url v1.7.0
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling crossbeam-deque v0.3.1
[INFO] [stderr]    Compiling tokio-io v0.1.6
[INFO] [stderr]    Compiling libflate v0.1.14
[INFO] [stderr]    Compiling phf_generator v0.7.22
[INFO] [stderr]    Compiling tendril v0.4.0
[INFO] [stderr]    Compiling uuid v0.5.1
[INFO] [stderr]    Compiling openssl-sys v0.9.30
[INFO] [stderr]    Compiling tokio-threadpool v0.1.3
[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-1.7.0/src/form_urlencoded.rs:261:40
[INFO] [stderr]     |
[INFO] [stderr] 259 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 260 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 261 |     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]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling string_cache_codegen v0.4.1
[INFO] [stderr]    Compiling phf_codegen v0.7.22
[INFO] [stderr]    Compiling tokio-reactor v0.1.1
[INFO] [stderr]    Compiling tokio-fs v0.1.0
[INFO] [stderr]    Compiling mime_guess v2.0.0-alpha.4
[INFO] [stderr]    Compiling selectors v0.19.0
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]    Compiling string_cache v0.7.2
[INFO] [stderr]    Compiling tokio-udp v0.1.0
[INFO] [stderr]    Compiling tokio-tcp v0.1.0
[INFO] [stderr]    Compiling tokio v0.1.6
[INFO] [stderr]    Compiling tokio-core v0.1.17
[INFO] [stderr]    Compiling serde_json v1.0.17
[INFO] [stderr]    Compiling serde_urlencoded v0.5.1
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling native-tls v0.1.5
[INFO] [stderr]    Compiling tokio-tls v0.1.4
[INFO] [stderr]    Compiling hyper v0.11.26
[INFO] [stderr]    Compiling serde_derive v1.0.55
[INFO] [stderr]    Compiling cssparser v0.23.7
[INFO] [stderr]    Compiling html5ever v0.22.3
[INFO] [stderr]    Compiling cssparser-macros v0.3.3
[INFO] [stderr]    Compiling hyper-tls v0.1.3
[INFO] [stderr]    Compiling reqwest v0.8.5
[INFO] [stderr] error[E0506]: cannot assign to `self.input.cached_token` because it is borrowed
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/cssparser-0.23.7/src/parser.rs:572:17
[INFO] [stderr]     |
[INFO] [stderr] 547 |     pub fn next_including_whitespace_and_comments(&mut self) -> Result<&Token<'i>, BasicParseError<'i>> {
[INFO] [stderr]     |                                                   - let's call the lifetime of this reference `'1`
[INFO] [stderr] ...
[INFO] [stderr] 560 |             Some(ref cached_token)
[INFO] [stderr]     |                  ---------------- borrow of `self.input.cached_token` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 572 |                 self.input.cached_token = Some(CachedToken {
[INFO] [stderr]     |                 ^^^^^^^^^^^^^^^^^^^^^^^ assignment to borrowed `self.input.cached_token` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 584 |         Ok(token)
[INFO] [stderr]     |         --------- returning this value requires that `self.input.cached_token.0` is borrowed for `'1`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0506`.
[INFO] [stderr] error: Could not compile `cssparser`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "c8a08ae3b0488d39b03a1928c2eda73cc1ca0babe52116fbb8358a9dc46222f9"`
[INFO] running `"docker" "rm" "-f" "c8a08ae3b0488d39b03a1928c2eda73cc1ca0babe52116fbb8358a9dc46222f9"`
[INFO] [stdout] c8a08ae3b0488d39b03a1928c2eda73cc1ca0babe52116fbb8358a9dc46222f9