patch 8.2.2581: Vim9: sourcing Vim9 script triggers a redraw
Problem: Vim9: sourcing Vim9 script triggers a redraw.
Solution: Do not let setting/restoring 'cpoptions' cause a redraw.
(closes #7920)
diff --git a/src/testdir/dumps/Test_vim9_no_redraw.dump b/src/testdir/dumps/Test_vim9_no_redraw.dump
new file mode 100644
index 0000000..1d77a08
--- /dev/null
+++ b/src/testdir/dumps/Test_vim9_no_redraw.dump
@@ -0,0 +1,6 @@
+|s+0&#ffffff0|o+0&#e0e0e08|m|e| |t|e|x|t| | +0&#ffffff0@64
+|~+0#4040ff13&| @73
+|~| @73
+|~| @73
+|~| @73
+|:+0#0000000&|'|<|,|'|>> @68
diff --git a/src/testdir/test_vim9_script.vim b/src/testdir/test_vim9_script.vim
index 32312b0..58a72ef 100644
--- a/src/testdir/test_vim9_script.vim
+++ b/src/testdir/test_vim9_script.vim
@@ -5,6 +5,7 @@
source view_util.vim
source vim9.vim
source shared.vim
+source screendump.vim
def Test_range_only()
new
@@ -3338,6 +3339,36 @@
set cpo&vim
enddef
+def Test_no_redraw_when_restoring_cpo()
+ CheckScreendump
+
+ var lines =<< trim END
+ vim9script
+ def script#func()
+ enddef
+ END
+ mkdir('Xdir/autoload', 'p')
+ writefile(lines, 'Xdir/autoload/script.vim')
+
+ lines =<< trim END
+ vim9script
+ set cpo+=M
+ exe 'set rtp^=' .. getcwd() .. '/Xdir'
+ au CmdlineEnter : ++once timer_start(0, () => script#func())
+ setline(1, 'some text')
+ END
+ writefile(lines, 'XTest_redraw_cpo')
+ var buf = RunVimInTerminal('-S XTest_redraw_cpo', {'rows': 6})
+ term_sendkeys(buf, "V:")
+ VerifyScreenDump(buf, 'Test_vim9_no_redraw', {})
+
+ # clean up
+ term_sendkeys(buf, "\<Esc>u")
+ StopVimInTerminal(buf)
+ delete('XTest_redraw_cpo')
+ delete('Xdir', 'rf')
+enddef
+
def Test_unset_any_variable()
var lines =<< trim END