It is otherwise impossible to determine which test failed sanitizer/valgrind
check. test/functional/helpers.lua module return was changed so that tests which
do not provide after_each function to get new check will automatically fail.
Problem: The entries added by matchaddpos() are returned by getmatches()
but can't be set with setmatches(). (Lcd)
Solution: Fix setmatches(). (Christian Brabandt)
0fce425772