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-rw-r--r--src/nvim/eval/funcs.c3
-rw-r--r--src/nvim/testdir/test_execute_func.vim2
2 files changed, 5 insertions, 0 deletions
diff --git a/src/nvim/eval/funcs.c b/src/nvim/eval/funcs.c
index 2a046efc0b..04e6a73f37 100644
--- a/src/nvim/eval/funcs.c
+++ b/src/nvim/eval/funcs.c
@@ -2045,6 +2045,9 @@ static void f_win_execute(typval_T *argvars, typval_T *rettv, FunPtr fptr)
win_T *wp = win_id2wp_tp(argvars, &tp);
win_T *save_curwin;
tabpage_T *save_curtab;
+ // Return an empty string if something fails.
+ rettv->v_type = VAR_STRING;
+ rettv->vval.v_string = NULL;
if (wp != NULL && tp != NULL) {
pos_T curpos = wp->w_cursor;
diff --git a/src/nvim/testdir/test_execute_func.vim b/src/nvim/testdir/test_execute_func.vim
index 51df61d762..15ba894dbe 100644
--- a/src/nvim/testdir/test_execute_func.vim
+++ b/src/nvim/testdir/test_execute_func.vim
@@ -93,6 +93,8 @@ func Test_win_execute()
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('textprop')
let popupwin = popup_create('the popup win', {'line': 2, 'col': 3})