[INFO] updating cached repository coreos/pr-nagbot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/coreos/pr-nagbot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/coreos/pr-nagbot" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/coreos/pr-nagbot"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/coreos/pr-nagbot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/coreos/pr-nagbot" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/coreos/pr-nagbot"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/coreos/pr-nagbot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b7a3a2c8bc94be97b6f282c54a924afb73272c31
[INFO] sha for GitHub repo coreos/pr-nagbot: b7a3a2c8bc94be97b6f282c54a924afb73272c31
[INFO] validating manifest of coreos/pr-nagbot 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 coreos/pr-nagbot 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 coreos/pr-nagbot
[INFO] finished frobbing coreos/pr-nagbot
[INFO] frobbed toml for coreos/pr-nagbot written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/coreos/pr-nagbot/Cargo.toml
[INFO] started frobbing coreos/pr-nagbot
[INFO] finished frobbing coreos/pr-nagbot
[INFO] frobbed toml for coreos/pr-nagbot written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/coreos/pr-nagbot/Cargo.toml
[INFO] crate coreos/pr-nagbot 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking coreos/pr-nagbot against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-3/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/coreos/pr-nagbot:/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] a2fed5ee7936de96d48a32aeb030f397704d47ac3608d7ab7655608487ca79f9
[INFO] running `"docker" "start" "-a" "a2fed5ee7936de96d48a32aeb030f397704d47ac3608d7ab7655608487ca79f9"`
[INFO] [stderr]    Compiling scopeguard v0.3.2
[INFO] [stderr]    Compiling libc v0.2.29
[INFO] [stderr]    Compiling either v1.1.0
[INFO] [stderr]    Compiling lazy_static v0.2.8
[INFO] [stderr]    Compiling futures v0.1.14
[INFO] [stderr]     Checking byteorder v1.1.0
[INFO] [stderr]     Checking untrusted v0.5.0
[INFO] [stderr]     Checking log v0.3.8
[INFO] [stderr]     Checking num-traits v0.1.40
[INFO] [stderr]     Checking percent-encoding v1.0.0
[INFO] [stderr]     Checking rustc-demangle v0.1.5
[INFO] [stderr]     Checking itoa v0.3.1
[INFO] [stderr]     Checking dtoa v0.4.1
[INFO] [stderr]     Checking serde v1.0.11
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking openssl-probe v0.1.1
[INFO] [stderr]     Checking unicode-segmentation v1.2.0
[INFO] [stderr]     Checking iovec v0.1.0
[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 net2 v0.2.31
[INFO] [stderr]    Compiling libz-sys v1.0.16
[INFO] [stderr]    Compiling openssl-sys v0.9.17
[INFO] [stderr]    Compiling curl-sys v0.3.14
[INFO] [stderr]     Checking socket2 v0.2.2
[INFO] [stderr]     Checking tokio-service v0.1.0
[INFO] [stderr]    Compiling coco v0.1.1
[INFO] [stderr]     Checking base64 v0.6.0
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]    Compiling unicase v2.0.0
[INFO] [stderr]     Checking futures-cpupool v0.1.5
[INFO] [stderr]     Checking bytes v0.4.5
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking textwrap v0.7.0
[INFO] [stderr]    Compiling num_cpus v1.6.2
[INFO] [stderr]    Compiling rand v0.3.16
[INFO] [stderr]     Checking mio v0.6.10
[INFO] [stderr]     Checking backtrace-sys v0.1.12
[INFO] [stderr]     Checking num-iter v0.1.34
[INFO] [stderr]     Checking clap v2.26.0
[INFO] [stderr]     Checking tokio-io v0.1.2
[INFO] [stderr]     Checking url v1.5.1
[INFO] [stderr]    Compiling serde_derive_internals v0.15.1
[INFO] [stderr]     Checking backtrace v0.3.2
[INFO] [stderr]     Checking num v0.1.40
[INFO] [stderr]    Compiling rayon-core v1.2.1
[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]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]     Checking tokio-core v0.1.9
[INFO] [stderr]     Checking chrono v0.4.0
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking mime v0.3.3
[INFO] [stderr]    Compiling rayon v0.7.1
[INFO] [stderr]     Checking tokio-proto v0.1.1
[INFO] [stderr]    Compiling serde_derive v1.0.11
[INFO] [stderr]    Compiling ring v0.11.0
[INFO] [stderr]     Checking hyper v0.11.2
[INFO] [stderr]     Checking serde_json v1.0.2
[INFO] [stderr]     Checking url_serde v0.2.0
[INFO] [stderr]     Checking serde_yaml v0.7.1
[INFO] [stderr]     Checking webpki v0.14.0
[INFO] [stderr]     Checking rustls v0.9.0
[INFO] [stderr]     Checking webpki-roots v0.11.0
[INFO] [stderr]     Checking tokio-rustls v0.2.4
[INFO] [stderr]     Checking hyper-rustls v0.8.0
[INFO] [stderr]     Checking github-rs v0.5.1
[INFO] [stderr]     Checking curl v0.4.8
[INFO] [stderr]     Checking slack-hook v0.5.0
[INFO] [stderr]     Checking pr-nagbot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/main.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 | /     error_chain!{
[INFO] [stderr] 43 | |         foreign_links {
[INFO] [stderr] 44 | |             SlackError(slack_hook::Error);
[INFO] [stderr] 45 | |             GithubError(github_rs::errors::Error);
[INFO] [stderr] 46 | |             JsonError(serde_json::Error);
[INFO] [stderr] 47 | |         }
[INFO] [stderr] 48 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/main.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 | /     error_chain!{
[INFO] [stderr] 43 | |         foreign_links {
[INFO] [stderr] 44 | |             SlackError(slack_hook::Error);
[INFO] [stderr] 45 | |             GithubError(github_rs::errors::Error);
[INFO] [stderr] 46 | |             JsonError(serde_json::Error);
[INFO] [stderr] 47 | |         }
[INFO] [stderr] 48 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/main.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 | /     error_chain!{
[INFO] [stderr] 43 | |         foreign_links {
[INFO] [stderr] 44 | |             SlackError(slack_hook::Error);
[INFO] [stderr] 45 | |             GithubError(github_rs::errors::Error);
[INFO] [stderr] 46 | |             JsonError(serde_json::Error);
[INFO] [stderr] 47 | |         }
[INFO] [stderr] 48 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::cause': replaced by Error::source, which can support downcasting
[INFO] [stderr]   --> src/main.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 | /     error_chain!{
[INFO] [stderr] 43 | |         foreign_links {
[INFO] [stderr] 44 | |             SlackError(slack_hook::Error);
[INFO] [stderr] 45 | |             GithubError(github_rs::errors::Error);
[INFO] [stderr] 46 | |             JsonError(serde_json::Error);
[INFO] [stderr] 47 | |         }
[INFO] [stderr] 48 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4m 06s
[INFO] running `"docker" "inspect" "a2fed5ee7936de96d48a32aeb030f397704d47ac3608d7ab7655608487ca79f9"`
[INFO] running `"docker" "rm" "-f" "a2fed5ee7936de96d48a32aeb030f397704d47ac3608d7ab7655608487ca79f9"`
[INFO] [stdout] a2fed5ee7936de96d48a32aeb030f397704d47ac3608d7ab7655608487ca79f9