[INFO] updating cached repository fusion2004/are_we_web_yet_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/fusion2004/are_we_web_yet_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/fusion2004/are_we_web_yet_rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/fusion2004/are_we_web_yet_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/fusion2004/are_we_web_yet_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/fusion2004/are_we_web_yet_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fusion2004/are_we_web_yet_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fusion2004/are_we_web_yet_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 143c1ed31df6a9ba10347ef30156728e181859d1
[INFO] sha for GitHub repo fusion2004/are_we_web_yet_rust: 143c1ed31df6a9ba10347ef30156728e181859d1
[INFO] validating manifest of fusion2004/are_we_web_yet_rust 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 fusion2004/are_we_web_yet_rust 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 fusion2004/are_we_web_yet_rust
[INFO] finished frobbing fusion2004/are_we_web_yet_rust
[INFO] frobbed toml for fusion2004/are_we_web_yet_rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/fusion2004/are_we_web_yet_rust/Cargo.toml
[INFO] started frobbing fusion2004/are_we_web_yet_rust
[INFO] finished frobbing fusion2004/are_we_web_yet_rust
[INFO] frobbed toml for fusion2004/are_we_web_yet_rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/fusion2004/are_we_web_yet_rust/Cargo.toml
[INFO] crate fusion2004/are_we_web_yet_rust 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing fusion2004/are_we_web_yet_rust against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/fusion2004/are_we_web_yet_rust:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 60c7eb7edc7a3a217d651f98dc2d648343071f9d14586b5565974ba8c9eb04f8
[INFO] running `"docker" "start" "-a" "60c7eb7edc7a3a217d651f98dc2d648343071f9d14586b5565974ba8c9eb04f8"`
[INFO] [stderr]    Compiling pq-sys v0.2.3
[INFO] [stderr]    Compiling regex-syntax v0.3.4
[INFO] [stderr]    Compiling rustc-serialize v0.3.19
[INFO] [stderr]    Compiling diesel_codegen_syntex v0.7.2
[INFO] [stderr]    Compiling num-traits v0.1.35
[INFO] [stderr]    Compiling serde v0.8.4
[INFO] [stderr]    Compiling ansi_term v0.8.0
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr] error[E0642]: patterns aren't allowed in methods without bodies
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.3.19/src/serialize.rs:147:45
[INFO] [stderr]     |
[INFO] [stderr] 147 |                                             &f_name: &str,
[INFO] [stderr]     |                                             ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]    Compiling rand v0.3.14
[INFO] [stderr]    Compiling term_size v0.1.0
[INFO] [stderr]    Compiling bit-set v0.2.0
[INFO] [stderr]    Compiling aho-corasick v0.5.2
[INFO] [stderr]    Compiling clap v2.10.3
[INFO] [stderr]    Compiling url v1.2.0
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling thread_local v0.2.6
[INFO] [stderr]    Compiling diesel v0.7.1
[INFO] [stderr]    Compiling chan v0.1.18
[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-1.2.0/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]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0642`.
[INFO] [stderr] error: Could not compile `rustc-serialize`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "60c7eb7edc7a3a217d651f98dc2d648343071f9d14586b5565974ba8c9eb04f8"`
[INFO] running `"docker" "rm" "-f" "60c7eb7edc7a3a217d651f98dc2d648343071f9d14586b5565974ba8c9eb04f8"`
[INFO] [stdout] 60c7eb7edc7a3a217d651f98dc2d648343071f9d14586b5565974ba8c9eb04f8