28fe86c48a
Summary: Due to how the code handled compactions in Level 0 in `PickCompaction()` it could be the case that two compactions on level 0 ran that produced tables in level 1 that overlap. However, this case seems like it would only occur on a seek compaction which is unlikely on level 0. Furthermore, level 0 and level 1 had to have a certain arrangement of files. Test Plan: make check Reviewers: dhruba, vamsi Reviewed By: dhruba CC: leveldb, sheki Differential Revision: https://reviews.facebook.net/D7923