commit https://github.com/vim/vim/commit/a260b87d9da17f605666630f18c1ed909c2b8bae Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jan 15 20:48:22 2016 +0100 patch 7.4.1096 Problem: Need several lines to verify a command produces an error. Solution: Add assert_fails(). (suggested by Nikolay Pavlov) Make the quickfix alloc test actually work.

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