[INFO] crate rustnet 0.0.1 is already in cache
[INFO] extracting crate rustnet 0.0.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/rustnet/0.0.1
[INFO] extracting crate rustnet 0.0.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustnet/0.0.1
[INFO] validating manifest of rustnet-0.0.1 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rustnet-0.0.1 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rustnet-0.0.1
[INFO] finished frobbing rustnet-0.0.1
[INFO] frobbed toml for rustnet-0.0.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/rustnet/0.0.1/Cargo.toml
[INFO] started frobbing rustnet-0.0.1
[INFO] finished frobbing rustnet-0.0.1
[INFO] frobbed toml for rustnet-0.0.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/rustnet/0.0.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: failed to download `sdl2-sys v0.0.23`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   unable to get packages from source
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to parse manifest at `/mnt/big/crater/work/local/cargo-home/registry/src/github.com-1ecc6299db9ec823/sdl2-sys-0.0.23/Cargo.toml`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   library target names cannot contain hyphens: sdl2-sys
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` failed