diff --git a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/CompletionParseTest.java b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/CompletionParseTest.java
index 09f4931e563..351af2ad606 100644
--- a/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/CompletionParseTest.java
+++ b/core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/CompletionParseTest.java
@@ -1196,4 +1196,23 @@ public class CompletionParseTest extends CompletionParseBaseTest {
 		}
 		return false;
 	}
+	
+	public void testBug66543() throws Exception
+	{
+		Writer writer = new StringWriter();
+		writer.write( "struct packet { int a; int b; };\n" ); //$NON-NLS-1$
+		writer.write( "struct packet buffer[5];\n" ); //$NON-NLS-1$
+		writer.write( "int main(int argc, char **argv) {\n" ); //$NON-NLS-1$
+		writer.write( " buffer[2]." ); //$NON-NLS-1$
+		String code = writer.toString();
+		IASTCompletionNode node = parse( code, code.indexOf( "[2].") + 4 ); //$NON-NLS-1$
+		assertNotNull( node );
+		assertNotNull( node.getCompletionContext() );
+		IASTNode.LookupKind [] kinds = new LookupKind[ 1 ];
+		kinds[0] = LookupKind.FIELDS;
+		ILookupResult result = node.getCompletionScope().lookup( node.getCompletionPrefix(), kinds, node.getCompletionContext(), node.getFunctionParameters() );
+		assertNotNull( result );
+		assertEquals( result.getResultsSize(), 2 );
+	}
+	
 }
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/ASTCodeScope.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/ASTCodeScope.java
index ccd4de59af6..c9e79941e6e 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/ASTCodeScope.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/ASTCodeScope.java
@@ -82,8 +82,7 @@ public class ASTCodeScope extends ASTScope implements IASTCodeScope {
     {
     	if(declarations != null)
     		return declarations.iterator();
-    	else
-    		return super.getDeclarations();
+    	return super.getDeclarations();
     }
     
     public void addDeclaration(IASTDeclaration declaration)
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/ASTFunction.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/ASTFunction.java
index c2eca1e0b79..e13310175a6 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/ASTFunction.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/ASTFunction.java
@@ -330,8 +330,7 @@ public class ASTFunction extends ASTScope implements IASTFunction
     {
     	if(declarations != null)
     		return declarations.iterator();
-    	else
-    		return super.getDeclarations();
+    	return super.getDeclarations();
     }
     
     public void addDeclaration(IASTDeclaration declaration)
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/CompleteParseASTFactory.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/CompleteParseASTFactory.java
index 1a89a283f92..79d1dd5b2ca 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/CompleteParseASTFactory.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/CompleteParseASTFactory.java
@@ -1636,6 +1636,7 @@ public class CompleteParseASTFactory extends BaseASTFactory implements IASTFacto
 			if ((info != null))
 			{
 				info.addOperatorExpression( TypeInfo.OperatorExpression.subscript );
+				info = info.getFinalType( null );
 			}else {
 				handleProblem( scope, IProblem.SEMANTIC_MALFORMED_EXPRESSION, null );
 			}
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/gcc/GCCASTCompleteExtension.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/gcc/GCCASTCompleteExtension.java
index fabe2341e7c..7c588d7f54f 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/gcc/GCCASTCompleteExtension.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/complete/gcc/GCCASTCompleteExtension.java
@@ -19,7 +19,6 @@ import java.util.List;
 import org.eclipse.cdt.core.parser.GCCKeywords;
 import org.eclipse.cdt.core.parser.ITokenDuple;
 import org.eclipse.cdt.core.parser.ParserMode;
-import org.eclipse.cdt.core.parser.ast.ASTExpressionEvaluationException;
 import org.eclipse.cdt.core.parser.ast.ASTUtil;
 import org.eclipse.cdt.core.parser.ast.IASTExpression;
 import org.eclipse.cdt.core.parser.ast.IASTScope;
@@ -29,7 +28,6 @@ import org.eclipse.cdt.core.parser.ast.IASTExpression.Kind;
 import org.eclipse.cdt.core.parser.ast.gcc.IASTGCCExpression;
 import org.eclipse.cdt.internal.core.parser.ast.GCCASTExtension;
 import org.eclipse.cdt.internal.core.parser.ast.complete.ASTBinaryExpression;
-import org.eclipse.cdt.internal.core.parser.ast.complete.ASTIdExpression;
 import org.eclipse.cdt.internal.core.parser.ast.complete.ASTTypeIdExpression;
 import org.eclipse.cdt.internal.core.parser.ast.complete.ASTUnaryExpression;
 import org.eclipse.cdt.internal.core.parser.ast.complete.ExpressionFactory;
@@ -59,10 +57,10 @@ public class GCCASTCompleteExtension extends GCCASTExtension {
 		{
 			return new ASTBinaryExpression( kind, references, lhs, rhs ){
 				public String toString(){
-					IASTExpression.Kind kind = getExpressionKind();
+					IASTExpression.Kind k = getExpressionKind();
 					StringBuffer buffer = new StringBuffer();
 					buffer.append( ASTUtil.getExpressionString( getLHSExpression() ) );
-					if( kind == IASTGCCExpression.Kind.RELATIONAL_MAX )
+					if( k == IASTGCCExpression.Kind.RELATIONAL_MAX )
 						buffer.append( " >? " ); //$NON-NLS-1$
 					else 
 						buffer.append( " <? " ); //$NON-NLS-1$
@@ -77,9 +75,9 @@ public class GCCASTCompleteExtension extends GCCASTExtension {
 		{
 			return new ASTUnaryExpression( kind, references, lhs ){
 				public String toString(){
-					IASTExpression.Kind kind = getExpressionKind();
+					IASTExpression.Kind k = getExpressionKind();
 					StringBuffer buffer = new StringBuffer();
-					if( kind == IASTGCCExpression.Kind.UNARY_ALIGNOF_UNARYEXPRESSION )
+					if( k == IASTGCCExpression.Kind.UNARY_ALIGNOF_UNARYEXPRESSION )
 						buffer.append( GCCKeywords.__ALIGNOF__ );
 					else
 						buffer.append( GCCKeywords.TYPEOF );
@@ -95,9 +93,9 @@ public class GCCASTCompleteExtension extends GCCASTExtension {
 		{
 			return new ASTTypeIdExpression( kind, references, typeId ){
 				public String toString(){
-					IASTExpression.Kind kind = getExpressionKind();
+					IASTExpression.Kind k = getExpressionKind();
 					StringBuffer buffer = new StringBuffer();
-					if( kind == IASTGCCExpression.Kind.UNARY_ALIGNOF_TYPEID )
+					if( k == IASTGCCExpression.Kind.UNARY_ALIGNOF_TYPEID )
 						buffer.append( GCCKeywords.__ALIGNOF__ );
 					else
 						buffer.append( GCCKeywords.TYPEOF );
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/expression/GCCASTExpressionExtension.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/expression/GCCASTExpressionExtension.java
index 881984e2d21..6934ea77444 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/expression/GCCASTExpressionExtension.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/ast/expression/GCCASTExpressionExtension.java
@@ -75,10 +75,10 @@ public class GCCASTExpressionExtension extends GCCASTExtension {
 		{
 			return new ASTBinaryExpression( kind, lhs, rhs ){
 				public String toString(){
-					IASTExpression.Kind kind = getExpressionKind();
+					IASTExpression.Kind k = getExpressionKind();
 					StringBuffer buffer = new StringBuffer();
 					buffer.append( ASTUtil.getExpressionString( getLHSExpression() ) );
-					if( kind == IASTGCCExpression.Kind.RELATIONAL_MAX )
+					if( k == IASTGCCExpression.Kind.RELATIONAL_MAX )
 						buffer.append( " >? " ); //$NON-NLS-1$
 					else 
 						buffer.append( " <? " ); //$NON-NLS-1$
@@ -93,9 +93,9 @@ public class GCCASTExpressionExtension extends GCCASTExtension {
 		{
 			return new ASTUnaryExpression( kind, lhs ){
 				public String toString(){
-					IASTExpression.Kind kind = getExpressionKind();
+					IASTExpression.Kind k = getExpressionKind();
 					StringBuffer buffer = new StringBuffer();
-					if( kind == IASTGCCExpression.Kind.UNARY_ALIGNOF_UNARYEXPRESSION )
+					if( k == IASTGCCExpression.Kind.UNARY_ALIGNOF_UNARYEXPRESSION )
 						buffer.append( GCCKeywords.__ALIGNOF__ );
 					else
 						buffer.append( GCCKeywords.TYPEOF );
@@ -111,9 +111,9 @@ public class GCCASTExpressionExtension extends GCCASTExtension {
 		{
 			return new ASTTypeIdExpression( kind, typeId ){
 				public String toString(){
-					IASTExpression.Kind kind = getExpressionKind();
+					IASTExpression.Kind k = getExpressionKind();
 					StringBuffer buffer = new StringBuffer();
-					if( kind == IASTGCCExpression.Kind.UNARY_ALIGNOF_TYPEID )
+					if( k == IASTGCCExpression.Kind.UNARY_ALIGNOF_TYPEID )
 						buffer.append( GCCKeywords.__ALIGNOF__ );
 					else
 						buffer.append( GCCKeywords.TYPEOF );
diff --git a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/pst/ParserSymbolTable.java b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/pst/ParserSymbolTable.java
index 6d4d8ecac34..b25cf0e8785 100644
--- a/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/pst/ParserSymbolTable.java
+++ b/core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/pst/ParserSymbolTable.java
@@ -2137,6 +2137,8 @@ public class ParserSymbolTable {
 				returnInfo.copy( topInfo );
 			} else			
 				returnInfo = new TypeInfo( topInfo );
+			returnInfo.applyOperatorExpressions( topInfo.getOperatorExpressions() );
+			returnInfo.getOperatorExpressions().clear();
 		}
 		
 		return returnInfo;