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[Closed] Crash in ANavLinkProxy::GetComponentsBoundingBox

If you turn a NavLinkProxy into a blueprint, and then compile it, you'll crash in ANavLinkProxy::GetComponentsBoundingBox because SmartLinkComp is NULL.

I reproduced this in a clean 4.13.

  1. Created new 1st person project called "NavLinkCrash"

  2. Place a navmesh bounds volume

  3. In "search classes" bar picked "Nav Link Proxy", dragged it into level (I tried to put it in the bounds volume - but I don't think it matters)

  4. Clicked "Blueprint/Add Script" button to create a blueprint for it (left it with default name)

  5. Clicked "compile" for that blueprint - crash.

Appears to happen because when the blueprint is compiled and it replaces the object via "CopyPropertiesForUnrelatedObjects", the SmartLinkComp doesn't get set in FFindInstanceReferenceSubobjectHelper::Duplicate, so it converts to NULL afterwards.

The object is clearly intended to have a SmartLinkComp, so I don't think guarding the "if" statement is sufficient, but I don't know what should be done about it.


Product Version: Not Selected
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asked Dec 09 '16 at 10:14 PM in Bug Reports

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The question has been closed Dec 09 '16 at 10:19 PM by AndrewHurley for the following reason:

The question is answered, right answer was accepted

1 answer: sort voted first

Hey Alex,

I have been able to reproduce the crash, and have entered a ticket to be investigated by our developers: https://issues.unrealengine.com/issue/UE-36486

We will also follow up here when this issue receives a fix. Please let us know if you have any other questions about this issue, or would like to discuss how you may be able to fix this yourself.

Have a great day

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answered Dec 09 '16 at 10:14 PM

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