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Not Reproducible

Votes

0

Found in

2017.3.0b1

Issue ID

969119

Regression

Yes

InvalidOperationException when creating a prefab

Asset - Database

-

Steps to reproduce :

- create a new project
- create a cube
- drag the cube in the Project Browser and notice the error

InvalidOperationException: Collection was modified; enumeration operation may not execute.
System.ThrowHelper.ThrowInvalidOperationException (System.ExceptionResource resource) (at /Users/builduser/buildslave/mono/build/mcs/class/referencesource/mscorlib/system/throwhelper.cs:99)
System.Collections.Generic.List`1+Enumerator[T].MoveNextRare () (at /Users/builduser/buildslave/mono/build/mcs/class/referencesource/mscorlib/system/collections/generic/list.cs:1181)
System.Collections.Generic.List`1+Enumerator[T].MoveNext () (at /Users/builduser/buildslave/mono/build/mcs/class/referencesource/mscorlib/system/collections/generic/list.cs:1175)
UnityEditor.ObjectListArea.HandleListArea () (at /Users/builduser/buildslave/unity/build/Editor/Mono/ObjectListArea.cs:1358)
UnityEditor.ObjectListArea.OnGUI (UnityEngine.Rect position, System.Int32 keyboardControlID) (at /Users/builduser/buildslave/unity/build/Editor/Mono/ObjectListArea.cs:564)
UnityEditor.ProjectBrowser.OnGUI () (at /Users/builduser/buildslave/unity/build/Editor/Mono/ProjectBrowser.cs:1763)
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:305)
Rethrow as TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Reflection/MonoMethod.cs:313)
System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) (at /Users/builduser/buildslave/mono/build/mcs/class/referencesource/mscorlib/system/reflection/methodbase.cs:229)
UnityEditor.HostView.Invoke (System.String methodName, System.Object obj) (at /Users/builduser/buildslave/unity/build/Editor/Mono/HostView.cs:295)
UnityEditor.HostView.Invoke (System.String methodName) (at /Users/builduser/buildslave/unity/build/Editor/Mono/HostView.cs:288)
UnityEditor.HostView.InvokeOnGUI (UnityEngine.Rect onGUIPosition) (at /Users/builduser/buildslave/unity/build/Editor/Mono/HostView.cs:261)
UnityEditor.DockArea.OldOnGUI () (at /Users/builduser/buildslave/unity/build/Editor/Mono/GUI/DockArea.cs:383)
UnityEngine.Experimental.UIElements.IMGUIContainer.DoOnGUI (UnityEngine.Event evt) (at /Users/builduser/buildslave/unity/build/Runtime/UIElements/Managed/IMGUIContainer.cs:195)
UnityEngine.Experimental.UIElements.IMGUIContainer.HandleIMGUIEvent (UnityEngine.Event e) (at /Users/builduser/buildslave/unity/build/Runtime/UIElements/Managed/IMGUIContainer.cs:333)
UnityEngine.Experimental.UIElements.IMGUIContainer.HandleEvent (UnityEngine.Experimental.UIElements.EventBase evt) (at /Users/builduser/buildslave/unity/build/Runtime/UIElements/Managed/IMGUIContainer.cs:317)
UnityEngine.Experimental.UIElements.EventDispatcher.PropagateEvent (UnityEngine.Experimental.UIElements.EventBase evt) (at /Users/builduser/buildslave/unity/build/Runtime/UIElements/Managed/EventDispatcher.cs:459)
UnityEngine.Experimental.UIElements.EventDispatcher.DispatchEvent (UnityEngine.Experimental.UIElements.EventBase evt, UnityEngine.Experimental.UIElements.IPanel panel) (at /Users/builduser/buildslave/unity/build/Runtime/UIElements/Managed/EventDispatcher.cs:340)
UnityEngine.Experimental.UIElements.UIElementsUtility.DoDispatch (UnityEngine.Experimental.UIElements.BaseVisualElementPanel panel) (at /Users/builduser/buildslave/unity/build/Runtime/UIElements/Managed/UIElementsUtility.cs:251)
UnityEngine.Experimental.UIElements.UIElementsUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at /Users/builduser/buildslave/unity/build/Runtime/UIElements/Managed/UIElementsUtility.cs:78)
UnityEngine.GUIUtility.ProcessEvent (System.Int32 instanceID, System.IntPtr nativeEventPtr) (at /Users/builduser/buildslave/unity/build/Runtime/IMGUI/Managed/GUIUtility.cs:175)

*Note:
Regression from 2018.3.a7.

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