[INFO] updating cached repository boxofrox/sscce-future-is-buggy-01
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/boxofrox/sscce-future-is-buggy-01
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/boxofrox/sscce-future-is-buggy-01" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/boxofrox/sscce-future-is-buggy-01"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/boxofrox/sscce-future-is-buggy-01'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/boxofrox/sscce-future-is-buggy-01" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/boxofrox/sscce-future-is-buggy-01"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/boxofrox/sscce-future-is-buggy-01'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c9405aec2a957a44e47ee2c5fcab32f46690ed53
[INFO] sha for GitHub repo boxofrox/sscce-future-is-buggy-01: c9405aec2a957a44e47ee2c5fcab32f46690ed53
[INFO] validating manifest of boxofrox/sscce-future-is-buggy-01 on toolchain master#435236b8877cdb98c82eaebfb7887782277265c5
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of boxofrox/sscce-future-is-buggy-01 on toolchain try#b5c7f157c20453dde8d47371abe73b32351b4e7f
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing boxofrox/sscce-future-is-buggy-01
[INFO] finished frobbing boxofrox/sscce-future-is-buggy-01
[INFO] frobbed toml for boxofrox/sscce-future-is-buggy-01 written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/boxofrox/sscce-future-is-buggy-01/Cargo.toml
[INFO] started frobbing boxofrox/sscce-future-is-buggy-01
[INFO] finished frobbing boxofrox/sscce-future-is-buggy-01
[INFO] frobbed toml for boxofrox/sscce-future-is-buggy-01 written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/boxofrox/sscce-future-is-buggy-01/Cargo.toml
[INFO] crate boxofrox/sscce-future-is-buggy-01 already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+435236b8877cdb98c82eaebfb7887782277265c5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking boxofrox/sscce-future-is-buggy-01 against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-1/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/boxofrox/sscce-future-is-buggy-01:/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=forbid" "-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" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] aee9ed4eb9018d6c71cb75287580b611c2794a810ffaca283107160c3d76fbb5
[INFO] running `"docker" "start" "-a" "aee9ed4eb9018d6c71cb75287580b611c2794a810ffaca283107160c3d76fbb5"`
[INFO] [stderr]     Checking futures v0.1.14
[INFO] [stderr]     Checking serde v1.0.8
[INFO] [stderr]     Checking either v1.1.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.11
[INFO] [stderr]     Checking iovec v0.1.0
[INFO] [stderr]     Checking net2 v0.2.29
[INFO] [stderr]     Checking twox-hash v1.1.0
[INFO] [stderr]     Checking url v1.4.1
[INFO] [stderr]     Checking chrono v0.3.1
[INFO] [stderr]     Checking bytes v0.4.4
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking mio v0.6.8
[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-1.4.1/src/form_urlencoded.rs:248:40
[INFO] [stderr]     |
[INFO] [stderr] 246 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 247 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 248 |     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]     Checking tokio-io v0.1.2
[INFO] [stderr]     Checking tokio-core v0.1.7
[INFO] [stderr]     Checking serde_json v1.0.2
[INFO] [stderr]     Checking backtrace v0.3.2
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking mysql_async v0.9.3
[INFO] [stderr]     Checking bug-test-01 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.99s
[INFO] running `"docker" "inspect" "aee9ed4eb9018d6c71cb75287580b611c2794a810ffaca283107160c3d76fbb5"`
[INFO] running `"docker" "rm" "-f" "aee9ed4eb9018d6c71cb75287580b611c2794a810ffaca283107160c3d76fbb5"`
[INFO] [stdout] aee9ed4eb9018d6c71cb75287580b611c2794a810ffaca283107160c3d76fbb5