[[ Bug 19158 ]] Prevent crash when using undo to bring back removed controls

HedgeHao · HedgeHao · commit 5c6d57b10206 · 2017-01-28T20:15:56.000+08:00
diff --git a/docs/notes/bugfix-19158.md b/docs/notes/bugfix-19158.md
@@ -0,0 +1 @@
+# Prevent crash when using undo to bring back removed controls
diff --git a/engine/src/control.cpp b/engine/src/control.cpp
@@ -582,6 +582,7 @@ void MCControl::undo(Ustruct *us)
 		{
 			MCCard *card = (MCCard *)parent->getcard();
 			getstack()->appendcontrol(this);
+			this->MCObject::m_weak_proxy = new MCObjectProxyBase(this);
 			card->newcontrol(this, False);
 			Boolean oldrlg = MCrelayergrouped;
 			MCrelayergrouped = True;

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+# Prevent crash when using undo to bring back removed controls`
Original file line number	Diff line number	Diff line change
`@@ -582,6 +582,7 @@ void MCControl::undo(Ustruct *us)`
`582`	`582`	`{`
`583`	`583`	`MCCard card = (MCCard )parent->getcard();`
`584`	`584`	`getstack()->appendcontrol(this);`
	`585`	`+ this->MCObject::m_weak_proxy = new MCObjectProxyBase(this);`
`585`	`586`	`card->newcontrol(this, False);`
`586`	`587`	`Boolean oldrlg = MCrelayergrouped;`
`587`	`588`	`MCrelayergrouped = True;`