patch 8.2.4997: Python: changing hidden buffer can cause display mess up
Problem: Python: changing hidden buffer can cause the display to be messed
up.
Solution: Do not mark changed lines when using another buffer. (Paul Ollis,
closes #10437, closes #7972)
diff --git a/src/testdir/test_python3.vim b/src/testdir/test_python3.vim
index 95d49db..dd2da40 100644
--- a/src/testdir/test_python3.vim
+++ b/src/testdir/test_python3.vim
@@ -4061,4 +4061,40 @@
bwipe! Xa.txt
endfunc
+" Test to catch regression fix #10437.
+func Test_python3_hidden_buf_mod_does_not_mess_up_display()
+ CheckRunVimInTerminal
+
+ let testfile = 'Xtest.vim'
+ let lines =<< trim END
+ set hidden number
+ new
+ hide
+ sil call setline(1, repeat(['aaa'], &lines) + ['bbbbbb'])
+ fu Func()
+ python3 << EOF
+ import vim
+ b = vim.buffers[2]
+ b[:] = ['', '']
+ EOF
+ endfu
+ norm! Gzb
+ call feedkeys(":call Func()\r", 'n')
+ END
+ call writefile(lines, testfile)
+
+ let rows = 10
+ let bufnr = term_start([GetVimProg(), '--clean', '-S', testfile], {'term_rows': rows})
+ call TermWait(bufnr, 100)
+ call assert_equal('run', job_status(term_getjob(bufnr)))
+ let g:test_is_flaky = 0
+ call WaitForAssert({-> assert_match('^ 3 aaa$', term_getline(bufnr, 1))})
+ call WaitForAssert({-> assert_match('^ 11 bbbbbb$', term_getline(bufnr, rows - 1))})
+
+ call term_sendkeys(bufnr, ":qall!\<CR>")
+ call WaitForAssert({-> assert_equal('dead', job_status(term_getjob(bufnr)))})
+ exe bufnr . 'bwipe!'
+ call delete(testfile)
+endfunc
+
" vim: shiftwidth=2 sts=2 expandtab