[INFO] updating cached repository intrepion/heroku-hello-rust-iron
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/intrepion/heroku-hello-rust-iron
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/intrepion/heroku-hello-rust-iron" "work/ex/beta-1.37-6/sources/1.36.0/gh/intrepion/heroku-hello-rust-iron"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/intrepion/heroku-hello-rust-iron'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/intrepion/heroku-hello-rust-iron" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/intrepion/heroku-hello-rust-iron"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/intrepion/heroku-hello-rust-iron'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a550dd4471245cd4098418877000823c2dae6b73
[INFO] sha for GitHub repo intrepion/heroku-hello-rust-iron: a550dd4471245cd4098418877000823c2dae6b73
[INFO] validating manifest of intrepion/heroku-hello-rust-iron 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 intrepion/heroku-hello-rust-iron 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 intrepion/heroku-hello-rust-iron
[INFO] finished frobbing intrepion/heroku-hello-rust-iron
[INFO] frobbed toml for intrepion/heroku-hello-rust-iron written to work/ex/beta-1.37-6/sources/1.36.0/gh/intrepion/heroku-hello-rust-iron/Cargo.toml
[INFO] started frobbing intrepion/heroku-hello-rust-iron
[INFO] finished frobbing intrepion/heroku-hello-rust-iron
[INFO] frobbed toml for intrepion/heroku-hello-rust-iron written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/intrepion/heroku-hello-rust-iron/Cargo.toml
[INFO] crate intrepion/heroku-hello-rust-iron 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 intrepion/heroku-hello-rust-iron 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-3/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/intrepion/heroku-hello-rust-iron:/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] 3adeacccdb124f5858282e42979580a6197db828ee2b1b93b9c9cd810ba66c41
[INFO] running `"docker" "start" "-a" "3adeacccdb124f5858282e42979580a6197db828ee2b1b93b9c9cd810ba66c41"`
[INFO] [stderr]    Compiling libc v0.2.19
[INFO] [stderr]    Compiling lazy_static v0.2.2
[INFO] [stderr]    Compiling idna v0.1.0
[INFO] [stderr]    Compiling time v0.1.36
[INFO] [stderr]    Compiling num_cpus v1.2.1
[INFO] [stderr]    Compiling url v1.2.4
[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-1.2.4/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]    Compiling hyper v0.10.0
[INFO] [stderr]    Compiling iron v0.5.1
[INFO] [stderr]    Compiling heroku-hello-rust-iron v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.27s
[INFO] running `"docker" "inspect" "3adeacccdb124f5858282e42979580a6197db828ee2b1b93b9c9cd810ba66c41"`
[INFO] running `"docker" "rm" "-f" "3adeacccdb124f5858282e42979580a6197db828ee2b1b93b9c9cd810ba66c41"`
[INFO] [stdout] 3adeacccdb124f5858282e42979580a6197db828ee2b1b93b9c9cd810ba66c41
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/intrepion/heroku-hello-rust-iron:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] ac1e43ae4f1196a5afb2f3ff6745f78cbfc017a6e96e63e65a90019f3a47aa72
[INFO] running `"docker" "start" "-a" "ac1e43ae4f1196a5afb2f3ff6745f78cbfc017a6e96e63e65a90019f3a47aa72"`
[INFO] [stderr]    Compiling heroku-hello-rust-iron v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `"docker" "inspect" "ac1e43ae4f1196a5afb2f3ff6745f78cbfc017a6e96e63e65a90019f3a47aa72"`
[INFO] running `"docker" "rm" "-f" "ac1e43ae4f1196a5afb2f3ff6745f78cbfc017a6e96e63e65a90019f3a47aa72"`
[INFO] [stdout] ac1e43ae4f1196a5afb2f3ff6745f78cbfc017a6e96e63e65a90019f3a47aa72
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/intrepion/heroku-hello-rust-iron:/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" "test" "--frozen"`
[INFO] [stdout] 0c26a6e8cfc8f5a6dd6a6e9aeb7e6f5733426145c215c8e33fed51f75acaf986
[INFO] running `"docker" "start" "-a" "0c26a6e8cfc8f5a6dd6a6e9aeb7e6f5733426145c215c8e33fed51f75acaf986"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/heroku_hello_rust_iron-dad78a0c5b23f367
[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" "0c26a6e8cfc8f5a6dd6a6e9aeb7e6f5733426145c215c8e33fed51f75acaf986"`
[INFO] running `"docker" "rm" "-f" "0c26a6e8cfc8f5a6dd6a6e9aeb7e6f5733426145c215c8e33fed51f75acaf986"`
[INFO] [stdout] 0c26a6e8cfc8f5a6dd6a6e9aeb7e6f5733426145c215c8e33fed51f75acaf986