commit https://github.com/vim/vim/commit/c4bfedabe057c05f09a455a5851089e177fa9c00 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Dec 14 21:42:00 2016 +0100 patch 8.0.0134 Problem: Null pointer access reported by UBsan. Solution: Check curwin->w_buffer is not NULL. (Yegappan Lakshmanan)

Test changelist position after splitting window
Set 'undolevels' to make changelist for sourced file

STARTTEST
:so small.vim
Gkylp:set ul=100
Gylp:set ul=100
gg
:vsplit
:try
:  normal g;
:  normal ggVGcpass
:catch
:  normal ggVGcfail
:finally
:  %w! test.out
:endtry
:qa!
ENDTEST

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