[INFO] updating cached repository totaki/snowgen
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/totaki/snowgen
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/totaki/snowgen" "work/ex/beta-1.38-1/sources/1.37.0/gh/totaki/snowgen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/totaki/snowgen'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/totaki/snowgen" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/totaki/snowgen"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/totaki/snowgen'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 39d12073951d618f8dd482a857ee4a48bfdb4a7c
[INFO] sha for GitHub repo totaki/snowgen: 39d12073951d618f8dd482a857ee4a48bfdb4a7c
[INFO] validating manifest of totaki/snowgen 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 totaki/snowgen 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 totaki/snowgen
[INFO] finished frobbing totaki/snowgen
[INFO] frobbed toml for totaki/snowgen written to work/ex/beta-1.38-1/sources/1.37.0/gh/totaki/snowgen/Cargo.toml
[INFO] started frobbing totaki/snowgen
[INFO] finished frobbing totaki/snowgen
[INFO] frobbed toml for totaki/snowgen written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/totaki/snowgen/Cargo.toml
[INFO] crate totaki/snowgen 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 totaki/snowgen 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-3/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/totaki/snowgen:/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] 111d1584c5ff1245d05c0174141b8233dfc89675f69307028d4c6ec6de4018cd
[INFO] running `"docker" "start" "-a" "111d1584c5ff1245d05c0174141b8233dfc89675f69307028d4c6ec6de4018cd"`
[INFO] [stderr]    Compiling serde v1.0.19
[INFO] [stderr]    Compiling pest v0.4.1
[INFO] [stderr]    Compiling memchr v1.0.2
[INFO] [stderr]    Compiling slug v0.1.2
[INFO] [stderr]    Compiling url v1.6.0
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling regex v0.2.2
[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-1.6.0/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 serde_json v1.0.5
[INFO] [stderr]    Compiling tera v0.10.10
[INFO] [stderr]    Compiling snowgen v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.78s
[INFO] running `"docker" "inspect" "111d1584c5ff1245d05c0174141b8233dfc89675f69307028d4c6ec6de4018cd"`
[INFO] running `"docker" "rm" "-f" "111d1584c5ff1245d05c0174141b8233dfc89675f69307028d4c6ec6de4018cd"`
[INFO] [stdout] 111d1584c5ff1245d05c0174141b8233dfc89675f69307028d4c6ec6de4018cd
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/totaki/snowgen:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 1d6c5348d6d6640cca448175ed23274da9c9c99cf3faef87a5a4f3e3f778873a
[INFO] running `"docker" "start" "-a" "1d6c5348d6d6640cca448175ed23274da9c9c99cf3faef87a5a4f3e3f778873a"`
[INFO] [stderr]    Compiling snowgen v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `"docker" "inspect" "1d6c5348d6d6640cca448175ed23274da9c9c99cf3faef87a5a4f3e3f778873a"`
[INFO] running `"docker" "rm" "-f" "1d6c5348d6d6640cca448175ed23274da9c9c99cf3faef87a5a4f3e3f778873a"`
[INFO] [stdout] 1d6c5348d6d6640cca448175ed23274da9c9c99cf3faef87a5a4f3e3f778873a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/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/totaki/snowgen:/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" "test" "--frozen"`
[INFO] [stdout] 1f39316fc8cdc5c9c17a4436289acfb82abca165ca5c813f8ffe3588e8adb086
[INFO] running `"docker" "start" "-a" "1f39316fc8cdc5c9c17a4436289acfb82abca165ca5c813f8ffe3588e8adb086"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/snowgen-d51e620944e87f6c
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "1f39316fc8cdc5c9c17a4436289acfb82abca165ca5c813f8ffe3588e8adb086"`
[INFO] running `"docker" "rm" "-f" "1f39316fc8cdc5c9c17a4436289acfb82abca165ca5c813f8ffe3588e8adb086"`
[INFO] [stdout] 1f39316fc8cdc5c9c17a4436289acfb82abca165ca5c813f8ffe3588e8adb086