[INFO] updating cached repository fanderzon/rocket-api
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fanderzon/rocket-api
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fanderzon/rocket-api" "work/ex/beta-1.37-6/sources/1.36.0/gh/fanderzon/rocket-api"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/fanderzon/rocket-api'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fanderzon/rocket-api" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/fanderzon/rocket-api"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/fanderzon/rocket-api'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1294c538500132c52383f6a4e65eca0ba1d8d13c
[INFO] sha for GitHub repo fanderzon/rocket-api: 1294c538500132c52383f6a4e65eca0ba1d8d13c
[INFO] validating manifest of fanderzon/rocket-api on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of fanderzon/rocket-api on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing fanderzon/rocket-api
[INFO] finished frobbing fanderzon/rocket-api
[INFO] frobbed toml for fanderzon/rocket-api written to work/ex/beta-1.37-6/sources/1.36.0/gh/fanderzon/rocket-api/Cargo.toml
[INFO] started frobbing fanderzon/rocket-api
[INFO] finished frobbing fanderzon/rocket-api
[INFO] frobbed toml for fanderzon/rocket-api written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/fanderzon/rocket-api/Cargo.toml
[INFO] crate fanderzon/rocket-api already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing fanderzon/rocket-api against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/fanderzon/rocket-api:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] a74c496a2999bc3ad67f7f280e39d4a0076970bb477603690b162f81ab8a7782
[INFO] running `"docker" "start" "-a" "a74c496a2999bc3ad67f7f280e39d4a0076970bb477603690b162f81ab8a7782"`
[INFO] [stderr]    Compiling pq-sys v0.2.7
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling toml v0.2.1
[INFO] [stderr]    Compiling rocket_codegen v0.1.5
[INFO] [stderr]    Compiling r2d2 v0.7.1
[INFO] [stderr]    Compiling url v1.3.0
[INFO] [stderr]    Compiling term-painter v0.2.3
[INFO] [stderr]    Compiling dotenv v0.8.0
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rocket_codegen-0.1.5/build.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `rocket_codegen`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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-1.3.0/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]     = 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] error: build failed
[INFO] running `"docker" "inspect" "a74c496a2999bc3ad67f7f280e39d4a0076970bb477603690b162f81ab8a7782"`
[INFO] running `"docker" "rm" "-f" "a74c496a2999bc3ad67f7f280e39d4a0076970bb477603690b162f81ab8a7782"`
[INFO] [stdout] a74c496a2999bc3ad67f7f280e39d4a0076970bb477603690b162f81ab8a7782