Sometimes 008_autocommands_spec fails like this:
[ RUN ] autocommands that delete and unload buffers: BufUnload, VimLeave: -- Output to stderr:
CMake Error at /home/travis/build/neovim/neovim/cmake/RunTests.cmake:53 (message):
functional tests failed with error: 1
The final :quit + wait() is a race. Use command() instead, which is
synchronous. Use command('silent! ...') everywhere else too, because
it's clearer instead of feeding input and clearing the expected errors
with CTRL-L.
Use unique filenames to avoid test conflicts.
Use read_file() instead of io.popen(), to ensures the file is closed.
Use helpers.rmdir(), it is far more robust than lfs.
closes#7911
Hope this will make people using feed_command less likely: this hides bugs.
Already found at least two:
1. msgpackparse() will show internal error: hash_add() in case of duplicate
keys, though it will still work correctly. Currently silenced.
2. ttimeoutlen was spelled incorrectly, resulting in option not being set when
expected. Test was still functioning somehow though. Currently fixed.
