[INFO] cloning repository swfsql/rust-exercises
[INFO] running `"git" "clone" "--bare" "git://github.com/swfsql/rust-exercises.git" "work/cache/sources/gh/swfsql/rust-exercises"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/swfsql/rust-exercises'...
[INFO] running `"git" "clone" "work/cache/sources/gh/swfsql/rust-exercises" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/swfsql/rust-exercises"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/swfsql/rust-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/swfsql/rust-exercises" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/swfsql/rust-exercises"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/swfsql/rust-exercises'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8a361fd62faefeb9eef99c510fd31d83fa8fe62f
[INFO] sha for GitHub repo swfsql/rust-exercises: 8a361fd62faefeb9eef99c510fd31d83fa8fe62f
[INFO] validating manifest of swfsql/rust-exercises 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 swfsql/rust-exercises 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 swfsql/rust-exercises
[INFO] finished frobbing swfsql/rust-exercises
[INFO] frobbed toml for swfsql/rust-exercises written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/swfsql/rust-exercises/Cargo.toml
[INFO] started frobbing swfsql/rust-exercises
[INFO] finished frobbing swfsql/rust-exercises
[INFO] frobbed toml for swfsql/rust-exercises written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/swfsql/rust-exercises/Cargo.toml
[INFO] crate swfsql/rust-exercises 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 swfsql/rust-exercises against try#8f81d0bf6baf07b92f1246696722485c4ca0b049 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-1/try#8f81d0bf6baf07b92f1246696722485c4ca0b049:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/swfsql/rust-exercises:/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] db06b0493974cdf587d8d8f1a71a583c069bb82ea5a6dacf394162e9d74c5eff
[INFO] running `"docker" "start" "-a" "db06b0493974cdf587d8d8f1a71a583c069bb82ea5a6dacf394162e9d74c5eff"`
[INFO] [stderr]     Checking euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `"docker" "inspect" "db06b0493974cdf587d8d8f1a71a583c069bb82ea5a6dacf394162e9d74c5eff"`
[INFO] running `"docker" "rm" "-f" "db06b0493974cdf587d8d8f1a71a583c069bb82ea5a6dacf394162e9d74c5eff"`
[INFO] [stdout] db06b0493974cdf587d8d8f1a71a583c069bb82ea5a6dacf394162e9d74c5eff