[INFO] updating cached repository https://github.com/emk/heroku-rust-cargo-hello
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e17e980a3fe939e677388f9fca5b3a6053d4fa4d
[INFO] testing emk/heroku-rust-cargo-hello against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Femk%2Fheroku-rust-cargo-hello" "work/builds/worker-3/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/emk/heroku-rust-cargo-hello on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/emk/heroku-rust-cargo-hello
[INFO] finished tweaking git repo https://github.com/emk/heroku-rust-cargo-hello
[INFO] tweaked toml for git repo https://github.com/emk/heroku-rust-cargo-hello written to work/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/emk/heroku-rust-cargo-hello already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] 5e4f28600af6be1631aa12574e41b7e58e94026c4d04b4bdc816ad3bbf28e9e8
[INFO] running `"docker" "start" "-a" "5e4f28600af6be1631aa12574e41b7e58e94026c4d04b4bdc816ad3bbf28e9e8"`
[INFO] [stderr]    Compiling matches v0.1.2
[INFO] [stderr]    Compiling unicode-normalization v0.1.2
[INFO] [stderr]    Compiling libc v0.2.16
[INFO] [stderr]    Compiling httparse v1.1.2
[INFO] [stderr]    Compiling route-recognizer v0.1.11
[INFO] [stderr]    Compiling unsafe-any v0.4.1
[INFO] [stderr]    Compiling hpack v0.2.0
[INFO] [stderr]    Compiling mime v0.2.2
[INFO] [stderr]    Compiling error v0.1.9
[INFO] [stderr]    Compiling unicase v1.4.0
[INFO] [stderr]    Compiling unicode-bidi v0.2.3
[INFO] [stderr]    Compiling typemap v0.3.3
[INFO] [stderr]    Compiling solicit v0.4.4
[INFO] [stderr]    Compiling plugin v0.2.6
[INFO] [stderr]    Compiling time v0.1.35
[INFO] [stderr]    Compiling num_cpus v0.2.13
[INFO] [stderr]    Compiling idna v0.1.0
[INFO] [stderr]    Compiling url v1.2.0
[INFO] [stderr] warning[E0713]: borrow may still be in use when destructor runs
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/url-1.2.0/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 cookie v0.2.5
[INFO] [stderr]    Compiling hyper v0.9.10
[INFO] [stderr]    Compiling iron v0.4.0
[INFO] [stderr]    Compiling router v0.4.0 (https://github.com/iron/router.git#ac19eb76)
[INFO] [stderr]    Compiling heroku-rust-cargo-hello v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 18.71s
[INFO] running `"docker" "inspect" "5e4f28600af6be1631aa12574e41b7e58e94026c4d04b4bdc816ad3bbf28e9e8"`
[INFO] running `"docker" "rm" "-f" "5e4f28600af6be1631aa12574e41b7e58e94026c4d04b4bdc816ad3bbf28e9e8"`
[INFO] [stdout] 5e4f28600af6be1631aa12574e41b7e58e94026c4d04b4bdc816ad3bbf28e9e8
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] ee1c8ab3fc68735649bf4eb7b5e4bd9c238155e9ae2f95ceae4ea20722b6ef2d
[INFO] running `"docker" "start" "-a" "ee1c8ab3fc68735649bf4eb7b5e4bd9c238155e9ae2f95ceae4ea20722b6ef2d"`
[INFO] [stderr]    Compiling heroku-rust-cargo-hello v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `"docker" "inspect" "ee1c8ab3fc68735649bf4eb7b5e4bd9c238155e9ae2f95ceae4ea20722b6ef2d"`
[INFO] running `"docker" "rm" "-f" "ee1c8ab3fc68735649bf4eb7b5e4bd9c238155e9ae2f95ceae4ea20722b6ef2d"`
[INFO] [stdout] ee1c8ab3fc68735649bf4eb7b5e4bd9c238155e9ae2f95ceae4ea20722b6ef2d
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] 941ed78bada5a2e3b637f84cd3815bafbb5058ad95bb94d2e00a08aa7d517b8e
[INFO] running `"docker" "start" "-a" "941ed78bada5a2e3b637f84cd3815bafbb5058ad95bb94d2e00a08aa7d517b8e"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/hello-b767d075c36a8b77
[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" "941ed78bada5a2e3b637f84cd3815bafbb5058ad95bb94d2e00a08aa7d517b8e"`
[INFO] running `"docker" "rm" "-f" "941ed78bada5a2e3b637f84cd3815bafbb5058ad95bb94d2e00a08aa7d517b8e"`
[INFO] [stdout] 941ed78bada5a2e3b637f84cd3815bafbb5058ad95bb94d2e00a08aa7d517b8e