[INFO] updating cached repository SimplyBuilt/flipper
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/SimplyBuilt/flipper
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/SimplyBuilt/flipper" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/SimplyBuilt/flipper"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/SimplyBuilt/flipper'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/SimplyBuilt/flipper" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/SimplyBuilt/flipper"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/SimplyBuilt/flipper'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f4cd73cae2128e4955058d07e52dd268bb0fa31e
[INFO] sha for GitHub repo SimplyBuilt/flipper: f4cd73cae2128e4955058d07e52dd268bb0fa31e
[INFO] validating manifest of SimplyBuilt/flipper on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of SimplyBuilt/flipper on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing SimplyBuilt/flipper
[INFO] finished frobbing SimplyBuilt/flipper
[INFO] frobbed toml for SimplyBuilt/flipper written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/SimplyBuilt/flipper/Cargo.toml
[INFO] started frobbing SimplyBuilt/flipper
[INFO] finished frobbing SimplyBuilt/flipper
[INFO] frobbed toml for SimplyBuilt/flipper written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/SimplyBuilt/flipper/Cargo.toml
[INFO] crate SimplyBuilt/flipper already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking SimplyBuilt/flipper against try#75eff020d0923c035c2fe220db4a0465cd847048 for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-1/try#75eff020d0923c035c2fe220db4a0465cd847048:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/SimplyBuilt/flipper:/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" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 81a6f328c38d5ea04c71a1e43e3f3a4798e7ad00757f1184ebaea79b0ba45c8a
[INFO] running `"docker" "start" "-a" "81a6f328c38d5ea04c71a1e43e3f3a4798e7ad00757f1184ebaea79b0ba45c8a"`
[INFO] [stderr]     Checking net2 v0.2.26
[INFO] [stderr]     Checking futures v0.1.10
[INFO] [stderr]     Checking base64 v0.3.0
[INFO] [stderr]    Compiling hyper v0.11.0-a.0 (https://github.com/hyperium/hyper.git?rev=c42f18db05e47fc24e8a8ece76cbc782b7558e8b#c42f18db)
[INFO] [stderr]     Checking url v1.4.0
[INFO] [stderr]    Compiling docopt v0.6.86
[INFO] [stderr]     Checking mio v0.6.4
[INFO] [stderr] error[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.4.0/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] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0713`.
[INFO] [stderr] error: Could not compile `url`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "81a6f328c38d5ea04c71a1e43e3f3a4798e7ad00757f1184ebaea79b0ba45c8a"`
[INFO] running `"docker" "rm" "-f" "81a6f328c38d5ea04c71a1e43e3f3a4798e7ad00757f1184ebaea79b0ba45c8a"`
[INFO] [stdout] 81a6f328c38d5ea04c71a1e43e3f3a4798e7ad00757f1184ebaea79b0ba45c8a