[INFO] updating cached repository sbwtw/cr_robot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sbwtw/cr_robot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sbwtw/cr_robot" "work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/sbwtw/cr_robot"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/sbwtw/cr_robot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sbwtw/cr_robot" "work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/sbwtw/cr_robot"`
[INFO] [stderr] Cloning into 'work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/sbwtw/cr_robot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ae1365ceb92356399fce3ca9cd657fa79105bcde
[INFO] sha for GitHub repo sbwtw/cr_robot: ae1365ceb92356399fce3ca9cd657fa79105bcde
[INFO] validating manifest of sbwtw/cr_robot on toolchain master#1891bfa80364eead426517c68de6947b7692e2de
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of sbwtw/cr_robot on toolchain try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing sbwtw/cr_robot
[INFO] finished frobbing sbwtw/cr_robot
[INFO] frobbed toml for sbwtw/cr_robot written to work/ex/pr-60261/sources/master#1891bfa80364eead426517c68de6947b7692e2de/gh/sbwtw/cr_robot/Cargo.toml
[INFO] started frobbing sbwtw/cr_robot
[INFO] finished frobbing sbwtw/cr_robot
[INFO] frobbed toml for sbwtw/cr_robot written to work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/sbwtw/cr_robot/Cargo.toml
[INFO] crate sbwtw/cr_robot already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1891bfa80364eead426517c68de6947b7692e2de-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking sbwtw/cr_robot against try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a for pr-60261
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60261/worker-7/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60261/sources/try#bfdcf6db3afcce5fe4013023cfa8ba359c5d527a/gh/sbwtw/cr_robot:/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" "+bfdcf6db3afcce5fe4013023cfa8ba359c5d527a-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f6f0db0006d679a895a5789d9142c9a0f6cbacb8e0eddf0053606140119354ba
[INFO] running `"docker" "start" "-a" "f6f0db0006d679a895a5789d9142c9a0f6cbacb8e0eddf0053606140119354ba"`
[INFO] [stderr]     Blocking waiting for file lock on the registry index
[INFO] [stderr]     Checking libc v0.2.27
[INFO] [stderr]     Checking serde v1.0.10
[INFO] [stderr]     Checking libflate v0.1.10
[INFO] [stderr]     Checking url v1.5.1
[INFO] [stderr]     Checking iovec v0.1.0
[INFO] [stderr]     Checking net2 v0.2.30
[INFO] [stderr]     Checking openssl-sys v0.9.15
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking num_cpus v1.6.2
[INFO] [stderr]     Checking time v0.1.38
[INFO] [stderr]     Checking term_size v0.3.0
[INFO] [stderr]     Checking atty v0.2.2
[INFO] [stderr]     Checking bytes v0.4.4
[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-1.5.1/src/form_urlencoded.rs:251:40
[INFO] [stderr]     |
[INFO] [stderr] 249 | impl<'a> Target for ::UrlQuery<'a> {
[INFO] [stderr]     |      -- lifetime `'a` defined here
[INFO] [stderr] 250 |     fn as_mut_string(&mut self) -> &mut String { &mut self.url.serialization }
[INFO] [stderr] 251 |     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]     Checking futures-cpupool v0.1.5
[INFO] [stderr]     Checking openssl v0.9.15
[INFO] [stderr]     Checking mio v0.6.9
[INFO] [stderr]     Checking textwrap v0.6.0
[INFO] [stderr]     Checking clap v2.25.1
[INFO] [stderr]     Checking tokio-io v0.1.2
[INFO] [stderr]     Checking tokio-core v0.1.8
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]     Checking native-tls v0.1.4
[INFO] [stderr]     Checking tokio-tls v0.1.3
[INFO] [stderr]     Checking hyper v0.11.1
[INFO] [stderr]     Checking serde_json v1.0.2
[INFO] [stderr]     Checking serde_urlencoded v0.5.1
[INFO] [stderr]     Checking hyper-tls v0.1.2
[INFO] [stderr]     Checking reqwest v0.7.1
[INFO] [stderr]     Checking cr_robot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.85s
[INFO] running `"docker" "inspect" "f6f0db0006d679a895a5789d9142c9a0f6cbacb8e0eddf0053606140119354ba"`
[INFO] running `"docker" "rm" "-f" "f6f0db0006d679a895a5789d9142c9a0f6cbacb8e0eddf0053606140119354ba"`
[INFO] [stdout] f6f0db0006d679a895a5789d9142c9a0f6cbacb8e0eddf0053606140119354ba