diff --git a/mlir/lib/IR/AsmPrinter.cpp b/mlir/lib/IR/AsmPrinter.cpp
--- a/mlir/lib/IR/AsmPrinter.cpp
+++ b/mlir/lib/IR/AsmPrinter.cpp
@@ -381,9 +381,12 @@
   // Print all of the attribute kind aliases.
   for (auto &kindAlias : attrKindToAlias) {
     auto &aliasAttrsPair = kindAlias.second;
-    for (unsigned i = 0, e = aliasAttrsPair.second.size(); i != e; ++i)
-      printAlias(aliasAttrsPair.first, aliasAttrsPair.second[i], i);
-    os << newLine;
+    unsigned size = aliasAttrsPair.second.size();
+    if (size > 0) {
+      for (unsigned i = 0; i != size; ++i)
+        printAlias(aliasAttrsPair.first, aliasAttrsPair.second[i], i);
+      os << newLine;
+    }
   }
 
   // In a second pass print all of the remaining attribute aliases that aren't