[INFO] cloning repository akxcv/b
[INFO] running `"git" "clone" "--bare" "git://github.com/akxcv/b.git" "work/cache/sources/gh/akxcv/b"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/akxcv/b'...
[INFO] running `"git" "clone" "work/cache/sources/gh/akxcv/b" "work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/akxcv/b"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/akxcv/b'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/akxcv/b" "work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/akxcv/b"`
[INFO] [stderr] Cloning into 'work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/akxcv/b'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2366ea43f953dd2bf094fb412e58a040a6a04a67
[INFO] sha for GitHub repo akxcv/b: 2366ea43f953dd2bf094fb412e58a040a6a04a67
[INFO] validating manifest of akxcv/b 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 akxcv/b 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 akxcv/b
[INFO] finished frobbing akxcv/b
[INFO] frobbed toml for akxcv/b written to work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/akxcv/b/Cargo.toml
[INFO] started frobbing akxcv/b
[INFO] finished frobbing akxcv/b
[INFO] frobbed toml for akxcv/b written to work/ex/pr-62008/sources/try#8f81d0bf6baf07b92f1246696722485c4ca0b049/gh/akxcv/b/Cargo.toml
[INFO] crate akxcv/b 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 akxcv/b against master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1 for pr-62008
[INFO] running `"docker" "create" "-v" "/mnt/big/ec2-user/crater/work/local/target-dirs/pr-62008/worker-6/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1:/opt/crater/target:rw,Z" "-v" "/mnt/big/ec2-user/crater/work/ex/pr-62008/sources/master#848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1/gh/akxcv/b:/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" "+848e0a23f34aaab3e4a974b031c86ef2a4e4fcc1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 24858624cebaef947ad63add7a4117a58eec26688dcda310489854b9461ba60e
[INFO] running `"docker" "start" "-a" "24858624cebaef947ad63add7a4117a58eec26688dcda310489854b9461ba60e"`
[INFO] [stderr]     Checking termion v1.5.1
[INFO] [stderr]     Checking serde_yaml v0.8.8
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking skim v0.5.2
[INFO] [stderr]     Checking b v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.16s
[INFO] running `"docker" "inspect" "24858624cebaef947ad63add7a4117a58eec26688dcda310489854b9461ba60e"`
[INFO] running `"docker" "rm" "-f" "24858624cebaef947ad63add7a4117a58eec26688dcda310489854b9461ba60e"`
[INFO] [stdout] 24858624cebaef947ad63add7a4117a58eec26688dcda310489854b9461ba60e