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-rw-r--r--src/Fl_cocoa.mm1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 318c33c06..9deee908f 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -4089,6 +4089,7 @@ static NSBitmapImageRep* rect_to_NSBitmapImageRep(Fl_Window *win, int x, int y,
NSEnumerator *enumerator = [children objectEnumerator];
id child;
while ((child = [enumerator nextObject]) != nil) {
+ if (![child isKindOfClass:[FLWindow class]]) continue;
Fl_Window *sub = [(FLWindow*)child getFl_Window];
CGRect rsub = CGRectMake(sub->x(), win->h() -(sub->y()+sub->h()), sub->w(), sub->h());
CGRect clip = CGRectMake(x, win->h()-(y+h), w, h);