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An internal error occurred during: "C/C++ Indexer"

For some reasons eclipse starts showing me this message recently and after that auto-completing and intellisense stop working

 An internal error occurred during: "C/C++ Indexer".
tried to access method java.lang.Object.clone()Ljava/lang/Object; from class org.eclipse.cdt.internal.core.dom.parser.cpp.semantics.SemanticUtil 

I searched a lot but with no value!


  1. Generally changing params Xms and Xmx to something like:



    in eclipse.ini file should fix it