[INFO] updating cached repository bellskinling/rust_big_number
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bellskinling/rust_big_number
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bellskinling/rust_big_number" "work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/bellskinling/rust_big_number"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/bellskinling/rust_big_number'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bellskinling/rust_big_number" "work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/bellskinling/rust_big_number"`
[INFO] [stderr] Cloning into 'work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/bellskinling/rust_big_number'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a820d69fd7f61e7c4b02f4aaefa206527030107c
[INFO] sha for GitHub repo bellskinling/rust_big_number: a820d69fd7f61e7c4b02f4aaefa206527030107c
[INFO] validating manifest of bellskinling/rust_big_number 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 bellskinling/rust_big_number 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 bellskinling/rust_big_number
[INFO] finished frobbing bellskinling/rust_big_number
[INFO] frobbed toml for bellskinling/rust_big_number written to work/ex/pr-62849/sources/master#435236b8877cdb98c82eaebfb7887782277265c5/gh/bellskinling/rust_big_number/Cargo.toml
[INFO] started frobbing bellskinling/rust_big_number
[INFO] finished frobbing bellskinling/rust_big_number
[INFO] frobbed toml for bellskinling/rust_big_number written to work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/bellskinling/rust_big_number/Cargo.toml
[INFO] crate bellskinling/rust_big_number 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+b5c7f157c20453dde8d47371abe73b32351b4e7f-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking bellskinling/rust_big_number against try#b5c7f157c20453dde8d47371abe73b32351b4e7f for pr-62849
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62849/worker-1/try#b5c7f157c20453dde8d47371abe73b32351b4e7f:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62849/sources/try#b5c7f157c20453dde8d47371abe73b32351b4e7f/gh/bellskinling/rust_big_number:/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] b3bc2ae216181b0ea5bde430fb98a0fb171e8686287c6780aa49f059a2e1d775
[INFO] running `"docker" "start" "-a" "b3bc2ae216181b0ea5bde430fb98a0fb171e8686287c6780aa49f059a2e1d775"`
[INFO] [stderr]     Checking big_number v0.1.0 (/opt/crater/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 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] 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 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" "b3bc2ae216181b0ea5bde430fb98a0fb171e8686287c6780aa49f059a2e1d775"`
[INFO] running `"docker" "rm" "-f" "b3bc2ae216181b0ea5bde430fb98a0fb171e8686287c6780aa49f059a2e1d775"`
[INFO] [stdout] b3bc2ae216181b0ea5bde430fb98a0fb171e8686287c6780aa49f059a2e1d775