[INFO] updating cached repository https://github.com/bellskinling/rust_big_number
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/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] a820d69fd7f61e7c4b02f4aaefa206527030107c
[INFO] checking bellskinling/rust_big_number against nightly-2019-10-27 for pr-65897
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbellskinling%2Frust_big_number" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bellskinling/rust_big_number on toolchain nightly-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/bellskinling/rust_big_number
[INFO] finished tweaking git repo https://github.com/bellskinling/rust_big_number
[INFO] tweaked toml for git repo https://github.com/bellskinling/rust_big_number written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/bellskinling/rust_big_number already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-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" "+nightly-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2b345232d7fde41ab9a0cc14e500e495712f658d1bd3e9b2e65dd7983102c735
[INFO] running `"docker" "start" "-a" "2b345232d7fde41ab9a0cc14e500e495712f658d1bd3e9b2e65dd7983102c735"`
[INFO] [stderr]     Checking big_number v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0637]: `'_` cannot be used here
[INFO] [stderr]   --> src/big_number_core/big_number.rs:23:30
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub type BigNumberRevIterMut<'_> = iter::Take<iter::Skip<iter::Rev<slice::IterMut<'_, i32>>>>;
[INFO] [stderr]    |                              ^^ `'_` is a reserved lifetime name
[INFO] [stderr] 
[INFO] [stderr] error[E0637]: `'_` cannot be used here
[INFO] [stderr]   --> src/big_number_core/big_number.rs:24:27
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub type BigNumberRevIter<'_> = iter::Take<iter::Skip<iter::Rev<slice::Iter<'_, i32>>>>;
[INFO] [stderr]    |                           ^^ `'_` is a reserved lifetime name
[INFO] [stderr] 
[INFO] [stderr] error[E0637]: `'_` cannot be used here
[INFO] [stderr]   --> src/big_number_core/big_number.rs:26:27
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub type BigNumberIterMut<'_> = iter::Take<iter::Skip<slice::IterMut<'_, ItemType>>>;
[INFO] [stderr]    |                           ^^ `'_` is a reserved lifetime name
[INFO] [stderr] 
[INFO] [stderr] error[E0637]: `'_` cannot be used here
[INFO] [stderr]   --> src/big_number_core/big_number.rs:27:24
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub type BigNumberIter<'_> = iter::Take<iter::Skip<slice::Iter<'_, ItemType>>>;
[INFO] [stderr]    |                        ^^ `'_` is a reserved lifetime name
[INFO] [stderr] 
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]   --> src/big_number_core/big_number.rs:23:83
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub type BigNumberRevIterMut<'_> = iter::Take<iter::Skip<iter::Rev<slice::IterMut<'_, i32>>>>;
[INFO] [stderr]    |                                                                                   ^^ expected lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]   --> src/big_number_core/big_number.rs:24:77
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub type BigNumberRevIter<'_> = iter::Take<iter::Skip<iter::Rev<slice::Iter<'_, i32>>>>;
[INFO] [stderr]    |                                                                             ^^ expected lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]   --> src/big_number_core/big_number.rs:26:70
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub type BigNumberIterMut<'_> = iter::Take<iter::Skip<slice::IterMut<'_, ItemType>>>;
[INFO] [stderr]    |                                                                      ^^ expected lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]   --> src/big_number_core/big_number.rs:27:64
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub type BigNumberIter<'_> = iter::Take<iter::Skip<slice::Iter<'_, ItemType>>>;
[INFO] [stderr]    |                                                                ^^ expected lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 8 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0106`.
[INFO] [stderr] error: could not compile `big_number`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0637]: `'_` cannot be used here
[INFO] [stderr]   --> src/big_number_core/big_number.rs:23:30
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub type BigNumberRevIterMut<'_> = iter::Take<iter::Skip<iter::Rev<slice::IterMut<'_, i32>>>>;
[INFO] [stderr]    |                              ^^ `'_` is a reserved lifetime name
[INFO] [stderr] 
[INFO] [stderr] error[E0637]: `'_` cannot be used here
[INFO] [stderr]   --> src/big_number_core/big_number.rs:24:27
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub type BigNumberRevIter<'_> = iter::Take<iter::Skip<iter::Rev<slice::Iter<'_, i32>>>>;
[INFO] [stderr]    |                           ^^ `'_` is a reserved lifetime name
[INFO] [stderr] 
[INFO] [stderr] error[E0637]: `'_` cannot be used here
[INFO] [stderr]   --> src/big_number_core/big_number.rs:26:27
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub type BigNumberIterMut<'_> = iter::Take<iter::Skip<slice::IterMut<'_, ItemType>>>;
[INFO] [stderr]    |                           ^^ `'_` is a reserved lifetime name
[INFO] [stderr] 
[INFO] [stderr] error[E0637]: `'_` cannot be used here
[INFO] [stderr]   --> src/big_number_core/big_number.rs:27:24
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub type BigNumberIter<'_> = iter::Take<iter::Skip<slice::Iter<'_, ItemType>>>;
[INFO] [stderr]    |                        ^^ `'_` is a reserved lifetime name
[INFO] [stderr] 
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]   --> src/big_number_core/big_number.rs:23:83
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub type BigNumberRevIterMut<'_> = iter::Take<iter::Skip<iter::Rev<slice::IterMut<'_, i32>>>>;
[INFO] [stderr]    |                                                                                   ^^ expected lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]   --> src/big_number_core/big_number.rs:24:77
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub type BigNumberRevIter<'_> = iter::Take<iter::Skip<iter::Rev<slice::Iter<'_, i32>>>>;
[INFO] [stderr]    |                                                                             ^^ expected lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]   --> src/big_number_core/big_number.rs:26:70
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub type BigNumberIterMut<'_> = iter::Take<iter::Skip<slice::IterMut<'_, ItemType>>>;
[INFO] [stderr]    |                                                                      ^^ expected lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error[E0106]: missing lifetime specifier
[INFO] [stderr]   --> src/big_number_core/big_number.rs:27:64
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub type BigNumberIter<'_> = iter::Take<iter::Skip<slice::Iter<'_, ItemType>>>;
[INFO] [stderr]    |                                                                ^^ expected lifetime parameter
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 8 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0106`.
[INFO] [stderr] error: could not compile `big_number`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2b345232d7fde41ab9a0cc14e500e495712f658d1bd3e9b2e65dd7983102c735"`
[INFO] running `"docker" "rm" "-f" "2b345232d7fde41ab9a0cc14e500e495712f658d1bd3e9b2e65dd7983102c735"`
[INFO] [stdout] 2b345232d7fde41ab9a0cc14e500e495712f658d1bd3e9b2e65dd7983102c735