commit https://github.com/vim/vim/commit/3f188935ec4db5117c4a64cc3f71219175624745 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Aug 25 13:57:04 2015 +0200 patch 7.4.831 Problem: When expanding on the command line and encountering an error, the command is executed anyway. Solution: Bail out when an error is detected.

Results of test106:
[['W', 1], ['E^@CCCC', 1]]
[['W', 1], ['E^@CCCC', 1]]
[['W', 1], ['ZZZZ', 0], ['E^@CCCC', 1], ['YYYY', 0]]