patch 8.2.2340: win_execute() unexpectedly returns number zero when failing
Problem: win_execute() unexpectedly returns number zero when failing.
Solution: Return an empty string. (closes #7665)
diff --git a/src/testdir/test_execute_func.vim b/src/testdir/test_execute_func.vim
index e02b08e..0363717 100644
--- a/src/testdir/test_execute_func.vim
+++ b/src/testdir/test_execute_func.vim
@@ -89,6 +89,8 @@
call win_gotoid(thiswin)
let line = win_execute(otherwin, 'echo getline(1)')
call assert_match('the new window', line)
+ let line = win_execute(134343, 'echo getline(1)')
+ call assert_equal('', line)
if has('popupwin')
let popupwin = popup_create('the popup win', {'line': 2, 'col': 3})
diff --git a/src/testdir/test_vim9_builtin.vim b/src/testdir/test_vim9_builtin.vim
index a84b7f6..40cfdcb 100644
--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -800,6 +800,11 @@
timer_stop(id)
enddef
+def Test_win_execute()
+ assert_equal("\n" .. winnr(), win_execute(win_getid(), 'echo winnr()'))
+ assert_equal('', win_execute(342343, 'echo winnr()'))
+enddef
+
def Test_win_splitmove()
split
win_splitmove(1, 2, {vertical: true, rightbelow: true})