diff --git a/Irony/Parsing/Parser/SpecialActionsHints/PrecedenceBasedParserAction.cs b/Irony/Parsing/Parser/SpecialActionsHints/PrecedenceBasedParserAction.cs
index f325889..d1ef8b1 100644
--- a/Irony/Parsing/Parser/SpecialActionsHints/PrecedenceBasedParserAction.cs
+++ b/Irony/Parsing/Parser/SpecialActionsHints/PrecedenceBasedParserAction.cs
@@ -28,10 +28,12 @@ public PrecedenceBasedParserAction(BnfTerm shiftTerm, ParserState newShiftState,
       base.DefaultAction = _shiftAction = new ShiftParserAction(shiftTerm, newShiftState);
     }
 
-    private static bool CheckMustReduce(ParsingContext context) {
+    private bool CheckMustReduce(ParsingContext context) {
       var input = context.CurrentParserInput;
-      for (int i = context.ParserStack.Count - 1; i >= 0; i--) {
-        var prevNode = context.ParserStack[i];
+      var stackCount = context.ParserStack.Count;
+      var prodLength = _reduceAction.Production.RValues.Count;
+      for (int i = 1; i <= prodLength; i++) {
+        var prevNode = context.ParserStack[stackCount - i];
         if (prevNode == null) continue;
         if (prevNode.Precedence == BnfTerm.NoPrecedence) continue;
         //if previous operator has the same precedence then use associativity
diff --git a/Microsoft.VisualStudio.TestTools.CppUnitTestFramework.CppUnitTestExtension.pdb/4B5DB1DDEF544449A37DD17CF9B843421/Microsoft.VisualStudio.TestTools.CppUnitTestFramework.CppUnitTestExtension.pdb b/Microsoft.VisualStudio.TestTools.CppUnitTestFramework.CppUnitTestExtension.pdb/4B5DB1DDEF544449A37DD17CF9B843421/Microsoft.VisualStudio.TestTools.CppUnitTestFramework.CppUnitTestExtension.pdb
new file mode 100644
index 0000000..2192b9e
Binary files /dev/null and b/Microsoft.VisualStudio.TestTools.CppUnitTestFramework.CppUnitTestExtension.pdb/4B5DB1DDEF544449A37DD17CF9B843421/Microsoft.VisualStudio.TestTools.CppUnitTestFramework.CppUnitTestExtension.pdb differ
diff --git a/pingme.txt b/pingme.txt
new file mode 100644
index 0000000..e69de29