diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
index 19d465911b6..a9d6dfe575a 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2CPPTests.java
@@ -2041,6 +2041,26 @@ public class AST2CPPTests extends AST2BaseTest {
         assertSame( printf, r2 );
     }
     
+    public void testBug86346() throws Exception {
+        StringBuffer buffer = new StringBuffer();
+        buffer.append("struct S;            \n"); //$NON-NLS-1$
+        buffer.append("extern S a;          \n"); //$NON-NLS-1$
+        buffer.append("void g( S );         \n"); //$NON-NLS-1$
+        buffer.append("void h() {           \n"); //$NON-NLS-1$
+        buffer.append("   g( a );           \n"); //$NON-NLS-1$
+        buffer.append("}                    \n"); //$NON-NLS-1$
+        
+        IASTTranslationUnit tu = parse(buffer.toString(), ParserLanguage.CPP);
+        CPPNameCollector col = new CPPNameCollector();
+        tu.getVisitor().visitTranslationUnit(col);
+        
+        ICPPClassType S = (ICPPClassType) col.getName(0).resolveBinding();
+        IFunction g = (IFunction) col.getName(3).resolveBinding();
+        
+        assertInstances( col, S, 3 );
+        assertInstances( col, g, 2 );
+    }
+    
     public void testBug86288() throws Exception
     {
     	String code = "int *foo( int *b ) { return (int *)(b); }"; //$NON-NLS-1$
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/cpp/ICPPBase.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/cpp/ICPPBase.java
index d03623119ed..f8fe5d3d70e 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/cpp/ICPPBase.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/core/dom/ast/cpp/ICPPBase.java
@@ -10,6 +10,7 @@
  **********************************************************************/
 package org.eclipse.cdt.core.dom.ast.cpp;
 
+import org.eclipse.cdt.core.dom.ast.DOMException;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTCompositeTypeSpecifier.ICPPASTBaseSpecifier;
 
 /**
@@ -25,14 +26,14 @@ public interface ICPPBase {
 	 * 
 	 * @return
 	 */
-	public ICPPClassType getBaseClass();
+	public ICPPClassType getBaseClass() throws DOMException;
 	
 	/**
 	 * The visibility qualifier applied to the base class.
 	 * 
 	 * @return
 	 */
-	public int getVisibility();
+	public int getVisibility() throws DOMException;
 	
 	public static final int v_private = ICPPASTBaseSpecifier.v_private;
 	public static final int v_protected = ICPPASTBaseSpecifier.v_protected;
@@ -43,6 +44,6 @@ public interface ICPPBase {
 	 * 
 	 * @return
 	 */
-	public boolean isVirtual();
+	public boolean isVirtual() throws DOMException;
 
 }
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPBaseClause.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPBaseClause.java
index c3e4abc8aa7..3ea45c51456 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPBaseClause.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPBaseClause.java
@@ -14,14 +14,32 @@
  */
 package org.eclipse.cdt.internal.core.dom.parser.cpp;
 
+import org.eclipse.cdt.core.dom.ast.DOMException;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPBase;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPClassType;
 import org.eclipse.cdt.core.dom.ast.cpp.ICPPASTCompositeTypeSpecifier.ICPPASTBaseSpecifier;
+import org.eclipse.cdt.internal.core.dom.parser.ProblemBinding;
 
 /**
  * @author aniefer
  */
 public class CPPBaseClause implements ICPPBase {
+    static public class CPPBaseProblem extends ProblemBinding implements ICPPBase {
+        public CPPBaseProblem( int id, char[] arg ) {
+            super( id, arg );
+        }
+        public ICPPClassType getBaseClass() throws DOMException {
+            throw new DOMException( this );
+        }
+
+        public int getVisibility() throws DOMException {
+            throw new DOMException( this );
+        }
+
+        public boolean isVirtual() throws DOMException {
+            throw new DOMException( this );
+        }
+    }
     ICPPASTBaseSpecifier base = null;
     
     public CPPBaseClause( ICPPASTBaseSpecifier base ){
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPClassType.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPClassType.java
index 5a1ab810813..364423624d8 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPClassType.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPClassType.java
@@ -305,8 +305,12 @@ public class CPPClassType implements ICPPClassType, ICPPBinding {
 	 * @see org.eclipse.cdt.core.dom.ast.cpp.ICPPClassType#getBases()
 	 */
 	public ICPPBase [] getBases() {
-		if( definition == null )
-		    return null; //TODO 
+		if( definition == null ){
+            checkForDefinition();
+            if( definition == null ){
+                return new ICPPBase [] { new CPPBaseClause.CPPBaseProblem( IProblemBinding.SEMANTIC_DEFINITION_NOT_FOUND, getNameCharArray() ) };
+            }
+        }
 		ICPPASTBaseSpecifier [] bases = definition.getBaseSpecifiers();
 		if( bases.length == 0 )
 		    return ICPPBase.EMPTY_BASE_ARRAY;
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPSemantics.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPSemantics.java
index 006ba388346..199856b29e6 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPSemantics.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/CPPSemantics.java
@@ -517,6 +517,8 @@ public class CPPSemantics {
 			    ICPPClassType cls = (ICPPClassType) t;
 			    ICPPBase[] bases = cls.getBases();
 			    for( int i = 0; i < bases.length; i++ ){
+			        if( bases[i] instanceof IProblemBinding )
+			            continue;
 			        getAssociatedScopes( bases[i].getBaseClass(), namespaces, classes );
 			    }
 		    }
@@ -1744,8 +1746,12 @@ public class CPPSemantics {
 			ICPPConstructor [] constructors = ((ICPPClassType)t).getConstructors();
 			
 			if( constructors.length > 0 ){
-			    //the list out of Arrays.asList does not support remove, which we need
-				constructor = (ICPPConstructor) resolveFunction( data, constructors );
+			    if( constructors.length == 1 && constructors[0] instanceof IProblemBinding )
+			        constructor = null;
+			    else {
+				    //the list out of Arrays.asList does not support remove, which we need
+					constructor = (ICPPConstructor) resolveFunction( data, constructors );
+			    }
 			}
 			if( constructor != null && constructor.isExplicit() ){
 				constructor = null;