[INFO] crate volatile_cell 1.0.0 is already in cache
[INFO] extracting crate volatile_cell 1.0.0 into work/ex/pr-59527/sources/master#003382e4150984cb476047b3925edf8d75df2d59/reg/volatile_cell/1.0.0
[INFO] extracting crate volatile_cell 1.0.0 into work/ex/pr-59527/sources/try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00/reg/volatile_cell/1.0.0
[INFO] validating manifest of volatile_cell-1.0.0 on toolchain master#003382e4150984cb476047b3925edf8d75df2d59
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+003382e4150984cb476047b3925edf8d75df2d59-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of volatile_cell-1.0.0 on toolchain try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+47f4f94676fbdd494dd2c2dc9ac377a13fc78e00-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing volatile_cell-1.0.0
[INFO] finished frobbing volatile_cell-1.0.0
[INFO] frobbed toml for volatile_cell-1.0.0 written to work/ex/pr-59527/sources/master#003382e4150984cb476047b3925edf8d75df2d59/reg/volatile_cell/1.0.0/Cargo.toml
[INFO] started frobbing volatile_cell-1.0.0
[INFO] finished frobbing volatile_cell-1.0.0
[INFO] frobbed toml for volatile_cell-1.0.0 written to work/ex/pr-59527/sources/try#47f4f94676fbdd494dd2c2dc9ac377a13fc78e00/reg/volatile_cell/1.0.0/Cargo.toml
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+003382e4150984cb476047b3925edf8d75df2d59-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/hackndev/rust-libcore`
[INFO] [stderr] error: no matching package named `core` found
[INFO] [stderr] location searched: https://github.com/hackndev/rust-libcore
[INFO] [stderr] required by package `volatile_cell v1.0.0 (/mnt/crater-raid/crater/work/ex/pr-59527/sources/master#003382e4150984cb476047b3925edf8d75df2d59/reg/volatile_cell/1.0.0)`
[ERROR] this task or one of its parent failed!
[ERROR] command `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+003382e4150984cb476047b3925edf8d75df2d59-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"` failed