How to reproduce:
1. Create a new project
2. Create a Cube and name it ".Cube"
3. Try to make a Prefab from the ".Cube"

Expected result: Prefab is made
Actual result: Prefab is not made and the error is thrown (Snapshot_1117029_V1)

Reproducible with - 2017.4.20f1, 2018.3.5f1, 2019.1.0b2, 2019.2.0a4

Notes:
When using symbols such as '*' the said symbols are replaced with '_'.

In 2018.3 or newer this error message is thrown:
File Assets couldn't be written. Because moving C:/Users/Gytis/Desktop/New Unity Project (6)/Temp/UnityTempFile-e3c4603fddb97e04290bf73f4af22bcd to C:/Users/Gytis/Desktop/New Unity Project (6)/Assets failed.
UnityEditorInternal.InternalEditorUtility:ProjectWindowDrag()
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

In 2017.4 version this error message is thrown:
Create prefab path must use .prefab extension
UnityEditorInternal.InternalEditorUtility:ProjectWindowDrag(HierarchyProperty, Boolean)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)