Update exebench.py

exebench.py

@@ -209,6 +209,8 @@ class ExeBench(datasets.GeneratorBasedBuilder):
             row['angha_iospec'] = None
         if 'real_iospec' not in row:
             row['real_iospec'] = None
+        if 'func_head_types' not in row:
+            row['func_head_types'] = ''
         row['asm'] = [{'target': target, 'code': code['func_asm'] if code else None} for (target, code) in
                        row['asm'].items()]  # TODO: pre_asm etc
         for removed_key in _REMOVED_FEATURES: