fetching https://github.com/denis-sh/druntime.git imprve-`core.checkedint` (attempt: 1/3)
From https://github.com/denis-sh/druntime
 * branch                imprve-`core.checkedint` -> FETCH_HEAD

merging FETCH_HEAD
Auto-merging old/src/core/checkedint.d
CONFLICT (content): Merge conflict in old/src/core/checkedint.d
Automatic merge failed; fix conflicts and then commit the result.