detect duplicate comment fields

diff --git a/generate_headers.py b/generate_headers.py
index 9e33e93f63d220abceb1a27e6df10bb74ef911c8..7ead2d42b4ff5b20671cdfcffa142b4eedb79c89 100755 (executable)
--- a/generate_headers.py
+++ b/generate_headers.py
@@ -276,6 +276,9 @@ def make_opcodes_dict() -> Dict[str, Dict[str, Any]]:
             comment = opcode['comment']
             if comment not in retval:
                 retval[comment] = opcode
+            else:
+                print(f"duplicate comment field: {comment!r}"
+                      f" subdecoder.pattern={subdecoder.pattern}")
     return retval