[INFO] cloning repository arturts/ProjectEuler-Rust
[INFO] running `"git" "clone" "--bare" "git://github.com/arturts/ProjectEuler-Rust.git" "work/cache/sources/gh/arturts/ProjectEuler-Rust"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/arturts/ProjectEuler-Rust'...
[INFO] running `"git" "clone" "work/cache/sources/gh/arturts/ProjectEuler-Rust" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/arturts/ProjectEuler-Rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/arturts/ProjectEuler-Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/arturts/ProjectEuler-Rust" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/arturts/ProjectEuler-Rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/arturts/ProjectEuler-Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0d6b5ae9979049d6258101fbe55eb91fefc7d39d
[INFO] sha for GitHub repo arturts/ProjectEuler-Rust: 0d6b5ae9979049d6258101fbe55eb91fefc7d39d
[INFO] validating manifest of arturts/ProjectEuler-Rust on toolchain master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of arturts/ProjectEuler-Rust on toolchain try#8f81d0bf6baf07b92f1246696722485c4ca0b049
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing arturts/ProjectEuler-Rust
[INFO] finished frobbing arturts/ProjectEuler-Rust
[INFO] frobbed toml for arturts/ProjectEuler-Rust written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/arturts/ProjectEuler-Rust/Cargo.toml
[INFO] started frobbing arturts/ProjectEuler-Rust
[INFO] finished frobbing arturts/ProjectEuler-Rust
[INFO] frobbed toml for arturts/ProjectEuler-Rust written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/arturts/ProjectEuler-Rust/Cargo.toml
[INFO] crate arturts/ProjectEuler-Rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/ec2-user/crater/work/local/cargo-home/bin/cargo" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking arturts/ProjectEuler-Rust against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-2/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/arturts/ProjectEuler-Rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/ec2-user/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/ec2-user/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" "+8f81d0bf6baf07b92f1246696722485c4ca0b049-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 19588c986745679ff43d6155b03e02cc85508cdc2501b5ba35b347341af70ceb
[INFO] running `"docker" "start" "-a" "19588c986745679ff43d6155b03e02cc85508cdc2501b5ba35b347341af70ceb"`
[INFO] [stderr]     Checking project_euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0600]: cannot apply unary operator `-` to type `usize`
[INFO] [stderr]  --> src/problem_4/mod.rs:4:36
[INFO] [stderr]   |
[INFO] [stderr] 4 |     for num_a in (999..99).step_by(-1) {
[INFO] [stderr]   |                                    ^^ cannot apply unary operator `-`
[INFO] [stderr]   |
[INFO] [stderr]   = note: unsigned values cannot be negated
[INFO] [stderr] 
[INFO] [stderr] error[E0600]: cannot apply unary operator `-` to type `usize`
[INFO] [stderr]  --> src/problem_4/mod.rs:5:42
[INFO] [stderr]   |
[INFO] [stderr] 5 |         for num_b in (num_a..99).step_by(-1) {
[INFO] [stderr]   |                                          ^^ cannot apply unary operator `-`
[INFO] [stderr]   |
[INFO] [stderr]   = note: unsigned values cannot be negated
[INFO] [stderr] 
[INFO] [stderr] error[E0600]: cannot apply unary operator `-` to type `usize`
[INFO] [stderr]  --> src/problem_4/mod.rs:4:36
[INFO] [stderr]   |
[INFO] [stderr] 4 |     for num_a in (999..99).step_by(-1) {
[INFO] [stderr]   |                                    ^^ cannot apply unary operator `-`
[INFO] [stderr]   |
[INFO] [stderr]   = note: unsigned values cannot be negated
[INFO] [stderr] 
[INFO] [stderr] error[E0600]: cannot apply unary operator `-` to type `usize`
[INFO] [stderr]  --> src/problem_4/mod.rs:5:42
[INFO] [stderr]   |
[INFO] [stderr] 5 |         for num_b in (num_a..99).step_by(-1) {
[INFO] [stderr]   |                                          ^^ cannot apply unary operator `-`
[INFO] [stderr]   |
[INFO] [stderr]   = note: unsigned values cannot be negated
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0600`.
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0600`.
[INFO] [stderr] error: Could not compile `project_euler`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: Could not compile `project_euler`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "19588c986745679ff43d6155b03e02cc85508cdc2501b5ba35b347341af70ceb"`
[INFO] running `"docker" "rm" "-f" "19588c986745679ff43d6155b03e02cc85508cdc2501b5ba35b347341af70ceb"`
[INFO] [stdout] 19588c986745679ff43d6155b03e02cc85508cdc2501b5ba35b347341af70ceb