[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 try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbellskinling%2Frust_big_number" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bellskinling/rust_big_number on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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-8/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=forbid" "-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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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] dce04bdb4c35f707d7c637afe96cbfe4ea9c5c0f2b6e210621e72968cb5e37c8
[INFO] running `"docker" "start" "-a" "dce04bdb4c35f707d7c637afe96cbfe4ea9c5c0f2b6e210621e72968cb5e37c8"`
[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] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/big_number_core/big_number.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `from_digit`, `pow10`, `to_base_length`, `to_digit`
[INFO] [stderr]  --> src/big_number_core/big_number.rs:5:20
[INFO] [stderr]   |
[INFO] [stderr] 5 | use super::tools::{to_base_length, from_digit, to_digit, pow10};
[INFO] [stderr]   |                    ^^^^^^^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/big_number_core/tools.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::big_number::BigNumber`
[INFO] [stderr]  --> src/big_number_core/tools.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use super::big_number::BigNumber;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::big_number::Sign`
[INFO] [stderr]  --> src/big_number_core/tools.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use super::big_number::Sign;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[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 named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] help: consider introducing a named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub type BigNumberRevIterMut<'a, '_> = iter::Take<iter::Skip<iter::Rev<slice::IterMut<'a, i32>>>>;
[INFO] [stderr]    |                              ^^^                                                      ^^
[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 named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] help: consider introducing a named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub type BigNumberRevIter<'a, '_> = iter::Take<iter::Skip<iter::Rev<slice::Iter<'a, i32>>>>;
[INFO] [stderr]    |                           ^^^                                                   ^^
[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 named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] help: consider introducing a named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub type BigNumberIterMut<'a, '_> = iter::Take<iter::Skip<slice::IterMut<'a, ItemType>>>;
[INFO] [stderr]    |                           ^^^                                            ^^
[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 named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] help: consider introducing a named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub type BigNumberIter<'a, '_> = iter::Take<iter::Skip<slice::Iter<'a, ItemType>>>;
[INFO] [stderr]    |                        ^^^                                         ^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 8 previous errors; 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0106, E0637.
[INFO] [stderr] For more information about an 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] [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] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/big_number_core/big_number.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `from_digit`, `pow10`, `to_base_length`, `to_digit`
[INFO] [stderr]  --> src/big_number_core/big_number.rs:5:20
[INFO] [stderr]   |
[INFO] [stderr] 5 | use super::tools::{to_base_length, from_digit, to_digit, pow10};
[INFO] [stderr]   |                    ^^^^^^^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/big_number_core/tools.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::big_number::BigNumber`
[INFO] [stderr]  --> src/big_number_core/tools.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use super::big_number::BigNumber;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::big_number::Sign`
[INFO] [stderr]  --> src/big_number_core/tools.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 | use super::big_number::Sign;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
[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 named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] help: consider introducing a named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub type BigNumberRevIterMut<'a, '_> = iter::Take<iter::Skip<iter::Rev<slice::IterMut<'a, i32>>>>;
[INFO] [stderr]    |                              ^^^                                                      ^^
[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 named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] help: consider introducing a named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] 24 | pub type BigNumberRevIter<'a, '_> = iter::Take<iter::Skip<iter::Rev<slice::Iter<'a, i32>>>>;
[INFO] [stderr]    |                           ^^^                                                   ^^
[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 named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] help: consider introducing a named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub type BigNumberIterMut<'a, '_> = iter::Take<iter::Skip<slice::IterMut<'a, ItemType>>>;
[INFO] [stderr]    |                           ^^^                                            ^^
[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 named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] help: consider introducing a named lifetime parameter
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub type BigNumberIter<'a, '_> = iter::Take<iter::Skip<slice::Iter<'a, ItemType>>>;
[INFO] [stderr]    |                        ^^^                                         ^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 8 previous errors; 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0106, E0637.
[INFO] [stderr] For more information about an 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" "dce04bdb4c35f707d7c637afe96cbfe4ea9c5c0f2b6e210621e72968cb5e37c8"`
[INFO] running `"docker" "rm" "-f" "dce04bdb4c35f707d7c637afe96cbfe4ea9c5c0f2b6e210621e72968cb5e37c8"`
[INFO] [stdout] dce04bdb4c35f707d7c637afe96cbfe4ea9c5c0f2b6e210621e72968cb5e37c8