commit https://github.com/vim/vim/commit/437905c25d4cedfa16d0f87392e4a000d22362b7 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Apr 26 19:01:05 2016 +0200 patch 7.4.1789 Problem: Cannot use ch_read() in the close callback. Solution: Do not discard the channel if there is readahead. Do not discard readahead if there is a close callback.

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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