[INFO] updating cached repository shousper/rust_bucket
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/shousper/rust_bucket
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/shousper/rust_bucket" "work/ex/beta-1.37-6/sources/1.36.0/gh/shousper/rust_bucket"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/shousper/rust_bucket'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/shousper/rust_bucket" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/shousper/rust_bucket"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/shousper/rust_bucket'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a88e6b39bb1ad91459545709aa70043f9e30f69e
[INFO] sha for GitHub repo shousper/rust_bucket: a88e6b39bb1ad91459545709aa70043f9e30f69e
[INFO] validating manifest of shousper/rust_bucket 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 shousper/rust_bucket 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 shousper/rust_bucket
[INFO] finished frobbing shousper/rust_bucket
[INFO] frobbed toml for shousper/rust_bucket written to work/ex/beta-1.37-6/sources/1.36.0/gh/shousper/rust_bucket/Cargo.toml
[INFO] started frobbing shousper/rust_bucket
[INFO] finished frobbing shousper/rust_bucket
[INFO] frobbed toml for shousper/rust_bucket written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/shousper/rust_bucket/Cargo.toml
[INFO] crate shousper/rust_bucket 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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing shousper/rust_bucket 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-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/shousper/rust_bucket:/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] ed8892eafcf8c74aca13376425b3883ff39c2bc52cae2579016d28fdd570dd23
[INFO] running `"docker" "start" "-a" "ed8892eafcf8c74aca13376425b3883ff39c2bc52cae2579016d28fdd570dd23"`
[INFO] [stderr]    Compiling num-traits v0.2.3
[INFO] [stderr]    Compiling sha1 v0.4.0
[INFO] [stderr]    Compiling base64 v0.9.2
[INFO] [stderr]    Compiling url v1.7.0
[INFO] [stderr]    Compiling mime v0.2.6
[INFO] [stderr]    Compiling input_buffer v0.1.1
[INFO] [stderr]    Compiling serde_json v1.0.19
[INFO] [stderr]    Compiling env_logger v0.5.10
[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] 
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling hyper v0.10.13
[INFO] [stderr]    Compiling serde_urlencoded v0.4.3
[INFO] [stderr]    Compiling tungstenite v0.5.3
[INFO] [stderr]    Compiling serde_json v0.9.10
[INFO] [stderr]    Compiling hyper-native-tls v0.2.4
[INFO] [stderr]    Compiling reqwest v0.4.0
[INFO] [stderr]    Compiling slack_api v0.19.0
[INFO] [stderr]    Compiling slack v0.20.0
[INFO] [stderr]    Compiling rust_bucket v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 27s
[INFO] running `"docker" "inspect" "ed8892eafcf8c74aca13376425b3883ff39c2bc52cae2579016d28fdd570dd23"`
[INFO] running `"docker" "rm" "-f" "ed8892eafcf8c74aca13376425b3883ff39c2bc52cae2579016d28fdd570dd23"`
[INFO] [stdout] ed8892eafcf8c74aca13376425b3883ff39c2bc52cae2579016d28fdd570dd23
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/shousper/rust_bucket:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 14292430bb3cd3f63fac7428e742fbe9e212974419c888f3299854475ce3cc43
[INFO] running `"docker" "start" "-a" "14292430bb3cd3f63fac7428e742fbe9e212974419c888f3299854475ce3cc43"`
[INFO] [stderr]    Compiling rust_bucket v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.25s
[INFO] running `"docker" "inspect" "14292430bb3cd3f63fac7428e742fbe9e212974419c888f3299854475ce3cc43"`
[INFO] running `"docker" "rm" "-f" "14292430bb3cd3f63fac7428e742fbe9e212974419c888f3299854475ce3cc43"`
[INFO] [stdout] 14292430bb3cd3f63fac7428e742fbe9e212974419c888f3299854475ce3cc43
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/shousper/rust_bucket:/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" "test" "--frozen"`
[INFO] [stdout] 946c56e5aa8bd6168fa1b1e0762df0e3e9944b056d08178202fb7577680fb6c9
[INFO] running `"docker" "start" "-a" "946c56e5aa8bd6168fa1b1e0762df0e3e9944b056d08178202fb7577680fb6c9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.17s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_bucket-9a01e516284e04f4
[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" "946c56e5aa8bd6168fa1b1e0762df0e3e9944b056d08178202fb7577680fb6c9"`
[INFO] running `"docker" "rm" "-f" "946c56e5aa8bd6168fa1b1e0762df0e3e9944b056d08178202fb7577680fb6c9"`
[INFO] [stdout] 946c56e5aa8bd6168fa1b1e0762df0e3e9944b056d08178202fb7577680fb6c9