diff -r 9df73385c878 -r 4793fa5955e0 src/mem/slicc/symbols/SymbolTable.py
--- a/src/mem/slicc/symbols/SymbolTable.py	Tue Jun 11 09:43:05 2013 +0200
+++ b/src/mem/slicc/symbols/SymbolTable.py	Tue Jun 18 13:16:19 2013 -0500
@@ -68,6 +68,11 @@
         if id in self.sym_map_vec[-1]:
             sym.error("Symbol '%s' redeclared in same scope.", id)
 
+        for sym_map in self.sym_map_vec:
+            if id in sym_map:
+                if type(self.sym_map_vec[0][id]) != type(sym):
+                    sym.error("Conflicting declaration of Symbol '%s'", id)
+
         # FIXME - warn on masking of a declaration in a previous frame
         self.sym_map_vec[-1][id] = sym