patch 8.0.0377: possible overflow when reading corrupted undo file commit https://github.com/vim/vim/commit/3eb1637b1bba19519885dd6d377bd5596e91d22c Author: Bram Moolenaar <Bram@vim.org> Date: Sun Feb 26 18:11:36 2017 +0100 patch 8.0.0377: possible overflow when reading corrupted undo file Problem: Possible overflow when reading corrupted undo file. Solution: Check if allocated size is not too big. (King)