[INFO] updating cached repository https://github.com/KoheiAsano/muiltiple_precision_rust
[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] 18625203709a5cd456cdea2fe0b72dcf8fef50a2
[INFO] checking KoheiAsano/muiltiple_precision_rust against master#209b2be09fcaff937480d1fbbe8b31646e361c7a for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKoheiAsano%2Fmuiltiple_precision_rust" "/workspace/builds/worker-4/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/KoheiAsano/muiltiple_precision_rust on toolchain 209b2be09fcaff937480d1fbbe8b31646e361c7a
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/KoheiAsano/muiltiple_precision_rust
[INFO] finished tweaking git repo https://github.com/KoheiAsano/muiltiple_precision_rust
[INFO] tweaked toml for git repo https://github.com/KoheiAsano/muiltiple_precision_rust written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/KoheiAsano/muiltiple_precision_rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+209b2be09fcaff937480d1fbbe8b31646e361c7a" "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] 2d4d68e454ac1bbf6f3334a115d172585096cc9212d65ac78a91f760e62ec0d1
[INFO] running `"docker" "start" "-a" "2d4d68e454ac1bbf6f3334a115d172585096cc9212d65ac78a91f760e62ec0d1"`
[INFO] [stderr]     Checking multiple_precision_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0601]: `main` function not found in crate `multiple_precision_rust`
[INFO] [stderr]    --> src/main.rs:1:1
[INFO] [stderr]     |
[INFO] [stderr] 1   | / mod complex;
[INFO] [stderr] 2   | |
[INFO] [stderr] 3   | | use std::fmt;
[INFO] [stderr] 4   | | use std::ops;
[INFO] [stderr] ...   |
[INFO] [stderr] 734 | |     }
[INFO] [stderr] 735 | | }
[INFO] [stderr]     | |_^ consider adding a `main` function to `src/main.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: could not compile `multiple_precision_rust`.
[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: unused variable: `q`
[INFO] [stderr]    --> src/main.rs:283:17
[INFO] [stderr]     |
[INFO] [stderr] 283 |         let mut q = BigInt::new();
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_q`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r`
[INFO] [stderr]    --> src/main.rs:284:17
[INFO] [stderr]     |
[INFO] [stderr] 284 |         let mut r = BigInt::new();
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `dividend_msd`
[INFO] [stderr]    --> src/main.rs:293:13
[INFO] [stderr]     |
[INFO] [stderr] 293 |         let dividend_msd = self.most_d() - 1;
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_dividend_msd`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r`
[INFO] [stderr]    --> src/main.rs:304:17
[INFO] [stderr]     |
[INFO] [stderr] 304 |         let mut r = BigInt::new();
[INFO] [stderr]     |                 ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lmd`
[INFO] [stderr]    --> src/main.rs:557:13
[INFO] [stderr]     |
[INFO] [stderr] 557 |         let lmd = self.most_d();
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_lmd`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rmd`
[INFO] [stderr]    --> src/main.rs:558:13
[INFO] [stderr]     |
[INFO] [stderr] 558 |         let rmd = rhs.most_d();
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_rmd`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:283:13
[INFO] [stderr]     |
[INFO] [stderr] 283 |         let mut q = BigInt::new();
[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/main.rs:284:13
[INFO] [stderr]     |
[INFO] [stderr] 284 |         let mut r = BigInt::new();
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:304:13
[INFO] [stderr]     |
[INFO] [stderr] 304 |         let mut r = BigInt::new();
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `isFirst` should have a snake case name
[INFO] [stderr]    --> src/main.rs:301:17
[INFO] [stderr]     |
[INFO] [stderr] 301 |         let mut isFirst = 1;
[INFO] [stderr]     |                 ^^^^^^^ help: convert the identifier to snake case: `is_first`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `check_naive_positive_division_divisor_smaller_than_RADIX` should have a snake case name
[INFO] [stderr]    --> src/main.rs:377:4
[INFO] [stderr]     |
[INFO] [stderr] 377 | fn check_naive_positive_division_divisor_smaller_than_RADIX() {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `check_naive_positive_division_divisor_smaller_than_radix`
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "2d4d68e454ac1bbf6f3334a115d172585096cc9212d65ac78a91f760e62ec0d1"`
[INFO] running `"docker" "rm" "-f" "2d4d68e454ac1bbf6f3334a115d172585096cc9212d65ac78a91f760e62ec0d1"`
[INFO] [stdout] 2d4d68e454ac1bbf6f3334a115d172585096cc9212d65ac78a91f760e62ec0d1
