patch 8.2.3162: Vim9: argument types are not checked at compile time
Problem: Vim9: argument types are not checked at compile time.
Solution: Add more type checks. (Yegappan Lakshmanan, closes #8560)
diff --git a/src/evalwindow.c b/src/evalwindow.c
index 0e1a202..329413d 100644
--- a/src/evalwindow.c
+++ b/src/evalwindow.c
@@ -653,6 +653,12 @@
int nr = 1;
tabpage_T *tp;
+ if (in_vim9script()
+ && (check_for_number_arg(argvars, 0) == FAIL
+ || (argvars[1].v_type != VAR_UNKNOWN
+ && check_for_string_arg(argvars, 1) == FAIL)))
+ return;
+
tp = find_tabpage((int)tv_get_number(&argvars[0]));
if (tp == NULL)
nr = 0;