estanglerbm opened a new issue #963:
URL: https://github.com/apache/royale-asjs/issues/963
In Flash Debug Player--after dealing with various VerifyError issues related
to issue #953--getting error
`ArgumentError: Error #2024: An object cannot be added as a child of itself.`
on any Spark application (haven't tried other types). Full stack:
```
ArgumentError: Error #2024: An object cannot be added as a child of itself.
at flash.display::DisplayObjectContainer/addChild()
at
org.apache.royale.core::UIBase/$sprite_addChild()[/org/apache/royale/0.9.8/org/apache/royale/core/UIBase.as:1564]
at
org.apache.royale.core::UIBase/addElement()[/org/apache/royale/0.9.8/org/apache/royale/core/UIBase.as:1170]
at
mx.core::UIComponent/addElement()[/org/apache/royale/0.9.8/mx/core/UIComponent.as:6109]
at
spark.components::SkinnableContainer/$addElement()[/org/apache/royale/0.9.8/spark/components/SkinnableContainer.as:1384]
at
org.apache.royale.core::ContainerBaseStrandChildren/addElement()[/org/apache/royale/0.9.8/org/apache/royale/core/ContainerBaseStrandChildren.as:67]
at
org.apache.royale.html.beads::ContainerView/addViewport()[/org/apache/royale/0.9.8/org/apache/royale/html/beads/ContainerView.as:147]
at
spark.components.beads::SkinnableContainerView/addViewport()[/org/apache/royale/0.9.8/spark/components/beads/SkinnableContainerView.as:120]
at org.apache.royale.html.beads::ContainerView/set
strand()[/org/apache/royale/0.9.8/org/apache/royale/html/beads/ContainerView.as:139]
at spark.components.beads::SparkContainerView/set
strand()[/org/apache/royale/0.9.8/spark/components/beads/SparkContainerView.as:65]
at
org.apache.royale.core::HTMLElementWrapper/addBead()[/org/apache/royale/0.9.8/org/apache/royale/core/HTMLElementWrapper.as:66]
at
org.apache.royale.core::UIBase/addBead()[/org/apache/royale/0.9.8/org/apache/royale/core/UIBase.as:1143]
at
global/org.apache.royale.utils::loadBeadFromValuesManager()[/org/apache/royale/0.9.8/org/apache/royale/utils/loadBeadFromValuesManager.as:55]
at
org.apache.royale.core::UIBase/addedToParent()[/org/apache/royale/0.9.8/org/apache/royale/core/UIBase.as:1398]
at
mx.core::UIComponent/addedToParent()[/org/apache/royale/0.9.8/mx/core/UIComponent.as:1991]
at
spark.components::SkinnableContainer/addedToParent()[/org/apache/royale/0.9.8/spark/components/SkinnableContainer.as:980]
at
mx.managers::SystemManager/addChild()[/org/apache/royale/0.9.8/mx/managers/SystemManager.as:1596]
at
mx.managers::SystemManager/initializeTopLevelWindow()[/org/apache/royale/0.9.8/mx/managers/SystemManager.as:2987]
at
mx.managers::SystemManager/kickOff()[/org/apache/royale/0.9.8/mx/managers/SystemManager.as:2831]
at
mx.managers::SystemManager/docFrameHandler()[/org/apache/royale/0.9.8/mx/managers/SystemManager.as:2710]
```
Ultimately, this is because ContainerView.addViewport() is doing:
`chost.strandChildren.addElement(viewport.contentView);`
where chost == viewport.contentView, because
SkinnableContainerView.addViewport() is not checking that chost !=
viewport.contentView before calling super.addViewport().
(Then the SWF-specific code in UIBase.addElement() is calling
$sprite_addChild(), which doesn't like it.)
What needs to be added with addElement, in the SWF case?
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