[INFO] updating cached repository https://github.com/koba-e964/rust-number-theory
[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] 6585894b5b711fd471dcb52a402a289eca26a1df
[INFO] checking koba-e964/rust-number-theory against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkoba-e964%2Frust-number-theory" "/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/koba-e964/rust-number-theory on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/koba-e964/rust-number-theory
[INFO] finished tweaking git repo https://github.com/koba-e964/rust-number-theory
[INFO] tweaked toml for git repo https://github.com/koba-e964/rust-number-theory written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/koba-e964/rust-number-theory already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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=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" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] f0934d8cad531452e86603c25382fecbd90ba95569f530cb402f1059ee79f287
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "f0934d8cad531452e86603c25382fecbd90ba95569f530cb402f1059ee79f287"`
[INFO] [stderr]     Checking rust-number-theory v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/polynomial.rs:199:19
[INFO] [stderr]     |
[INFO] [stderr] 199 |         (self as &std::fmt::Display).fmt(f)
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::fmt::Display`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BigInt`
[INFO] [stderr]  --> src/determinant.rs:3:11
[INFO] [stderr]   |
[INFO] [stderr] 3 | use num::{BigInt, BigRational, One, Zero};
[INFO] [stderr]   |           ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `num::BigInt`
[INFO] [stderr]    --> src/algebraic.rs:137:9
[INFO] [stderr]     |
[INFO] [stderr] 137 |     use num::BigInt;
[INFO] [stderr]     |         ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/polynomial.rs:199:19
[INFO] [stderr]     |
[INFO] [stderr] 199 |         (self as &std::fmt::Display).fmt(f)
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn std::fmt::Display`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `BigInt`
[INFO] [stderr]  --> src/determinant.rs:3:11
[INFO] [stderr]   |
[INFO] [stderr] 3 | use num::{BigInt, BigRational, One, Zero};
[INFO] [stderr]   |           ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/determinant.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |           /// det((2, -1; 5, -4)) = -3
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 47 | /         let mat = vec![vec![to_rat(2), to_rat(-1)],
[INFO] [stderr] 48 | |                        vec![to_rat(5), to_rat(-4)]];
[INFO] [stderr]    | |____________________________________________________- rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/polynomial.rs:106:31
[INFO] [stderr]     |
[INFO] [stderr] 106 |                 let mut tmp = std::mem::uninitialized();
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/determinant.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |           /// det((3, 2, 1; -1, 2, 2; -2, -3, 2)) = 33
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 54 | /         let mat = vec![vec![to_rat(3), to_rat(2), to_rat(1)],
[INFO] [stderr] 55 | |                        vec![to_rat(-1), to_rat(2), to_rat(2)],
[INFO] [stderr] 56 | |                        vec![to_rat(-2), to_rat(-3), to_rat(2)]];
[INFO] [stderr]    | |________________________________________________________________- rustdoc does not generate documentation for statements
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]    --> src/polynomial.rs:106:31
[INFO] [stderr]     |
[INFO] [stderr] 106 |                 let mut tmp = std::mem::uninitialized();
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/polynomial.rs:255:13
[INFO] [stderr]     |
[INFO] [stderr] 255 |         let mut coef = &tmp[i + b_deg] / &lcb;
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/polynomial.rs:278:13
[INFO] [stderr]     |
[INFO] [stderr] 278 |         let mut coef = &tmp[i + b_deg] / lc;
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] error[E0502]: cannot borrow `a` as immutable because it is also borrowed as mutable
[INFO] [stderr]   --> src/determinant.rs:28:39
[INFO] [stderr]    |
[INFO] [stderr] 28 |                 a[j][k] -= &factor * &a[i][k];
[INFO] [stderr]    |                 ----------------------^------
[INFO] [stderr]    |                 |                     |
[INFO] [stderr]    |                 |                     immutable borrow occurs here
[INFO] [stderr]    |                 mutable borrow occurs here
[INFO] [stderr]    |                 mutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0502`.
[INFO] [stderr] error: could not compile `rust-number-theory`.
[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] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/polynomial.rs:255:13
[INFO] [stderr]     |
[INFO] [stderr] 255 |         let mut coef = &tmp[i + b_deg] / &lcb;
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/polynomial.rs:278:13
[INFO] [stderr]     |
[INFO] [stderr] 278 |         let mut coef = &tmp[i + b_deg] / lc;
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] error[E0502]: cannot borrow `a` as immutable because it is also borrowed as mutable
[INFO] [stderr]   --> src/determinant.rs:28:39
[INFO] [stderr]    |
[INFO] [stderr] 28 |                 a[j][k] -= &factor * &a[i][k];
[INFO] [stderr]    |                 ----------------------^------
[INFO] [stderr]    |                 |                     |
[INFO] [stderr]    |                 |                     immutable borrow occurs here
[INFO] [stderr]    |                 mutable borrow occurs here
[INFO] [stderr]    |                 mutable borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0502`.
[INFO] [stderr] error: could not compile `rust-number-theory`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "f0934d8cad531452e86603c25382fecbd90ba95569f530cb402f1059ee79f287"`
[INFO] running `"docker" "rm" "-f" "f0934d8cad531452e86603c25382fecbd90ba95569f530cb402f1059ee79f287"`
[INFO] [stdout] f0934d8cad531452e86603c25382fecbd90ba95569f530cb402f1059ee79f287
