[INFO] updating cached repository phideg/neptungen
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/phideg/neptungen
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/phideg/neptungen" "work/ex/beta-1.37-6/sources/1.36.0/gh/phideg/neptungen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/phideg/neptungen'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/phideg/neptungen" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/phideg/neptungen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/phideg/neptungen'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8887bdebadf7141e39cdfb93ec30f1e73e2563d1
[INFO] sha for GitHub repo phideg/neptungen: 8887bdebadf7141e39cdfb93ec30f1e73e2563d1
[INFO] validating manifest of phideg/neptungen 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 phideg/neptungen 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 phideg/neptungen
[INFO] finished frobbing phideg/neptungen
[INFO] frobbed toml for phideg/neptungen written to work/ex/beta-1.37-6/sources/1.36.0/gh/phideg/neptungen/Cargo.toml
[INFO] started frobbing phideg/neptungen
[INFO] finished frobbing phideg/neptungen
[INFO] frobbed toml for phideg/neptungen written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/phideg/neptungen/Cargo.toml
[INFO] crate phideg/neptungen 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 phideg/neptungen against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/phideg/neptungen:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] aae775fc0bddcc4e6617176b54cf33145a400f1f2bdb2ca2f5d28d2e9ed90362
[INFO] running `"docker" "start" "-a" "aae775fc0bddcc4e6617176b54cf33145a400f1f2bdb2ca2f5d28d2e9ed90362"`
[INFO] [stderr]    Compiling num-traits v0.2.3
[INFO] [stderr]    Compiling crunchy v0.1.6
[INFO] [stderr]    Compiling crc16 v0.3.4
[INFO] [stderr]    Compiling same-file v0.1.3
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling getopts v0.2.17
[INFO] [stderr]    Compiling lazy_static v0.1.16
[INFO] [stderr]    Compiling crc8 v0.1.1
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling md6 v1.1.1
[INFO] [stderr]    Compiling blake v1.1.1
[INFO] [stderr]    Compiling memchr v0.1.11
[INFO] [stderr]    Compiling rpassword v2.0.0
[INFO] [stderr]    Compiling tabwriter v1.0.4
[INFO] [stderr]    Compiling inflate v0.3.4
[INFO] [stderr]    Compiling deflate v0.7.18
[INFO] [stderr]    Compiling term-painter v0.2.4
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling shaman v0.1.0
[INFO] [stderr]    Compiling walkdir v1.0.7
[INFO] [stderr]    Compiling pbr v1.0.1
[INFO] [stderr]    Compiling clap v2.31.2
[INFO] [stderr]    Compiling aho-corasick v0.5.3
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling syn v0.13.8
[INFO] [stderr]    Compiling url v1.7.0
[INFO] [stderr]    Compiling num-integer v0.1.37
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling thread-id v2.0.0
[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 rayon-core v1.4.0
[INFO] [stderr]    Compiling tiny-keccak v1.4.1
[INFO] [stderr]    Compiling num-iter v0.1.36
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling chrono v0.4.2
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling png v0.11.0
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling regex v0.1.80
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling serde_derive v1.0.53
[INFO] [stderr]    Compiling jpeg-decoder v0.1.14
[INFO] [stderr]    Compiling backtrace v0.3.7
[INFO] [stderr]    Compiling error-chain v0.11.0
[INFO] [stderr] error: Could not compile `tiny-keccak`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name tiny_keccak /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/tiny-keccak-1.4.1/src/lib.rs --color never --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 -C metadata=40d91eab3fac3733 -C extra-filename=-40d91eab3fac3733 --out-dir /opt/crater/target/debug/deps -L dependency=/opt/crater/target/debug/deps --extern crunchy=/opt/crater/target/debug/deps/libcrunchy-f1b4dbdd7a82b621.rlib --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "aae775fc0bddcc4e6617176b54cf33145a400f1f2bdb2ca2f5d28d2e9ed90362"`
[INFO] running `"docker" "rm" "-f" "aae775fc0bddcc4e6617176b54cf33145a400f1f2bdb2ca2f5d28d2e9ed90362"`
[INFO] [stdout] aae775fc0bddcc4e6617176b54cf33145a400f1f2bdb2ca2f5d28d2e9ed90362