show line number on error

app.py

@@ -1393,32 +1393,40 @@ You can freely edit and test GGUF chat template(s) (and are encouraged to do so)
         try:
             chat_output = tokenizer.apply_chat_template(messages, tools = tools, documents = documents, chat_template = template, tokenize = False, **chat_template_kwargs)
         except Exception as e:
+            emsg = f"Line {e.lineno}: " if hasattr(e, "lineno") else ""
+            emsg += e.message if hasattr(e, "message") else str(e)
             gr.Warning(
-                message = str(e),
+                message = emsg,
                 duration = None,
                 title = "Chat Template Error",
             )
         try:
             chat_tool_use_output = tokenizer.apply_chat_template(messages, tools = tools or [], chat_template = template_tool_use, tokenize = False, **chat_template_kwargs) if template_tool_use else None
         except Exception as e:
+            emsg = f"Line {e.lineno}: " if hasattr(e, "lineno") else ""
+            emsg += e.message if hasattr(e, "message") else str(e)
             gr.Warning(
-                message = str(e),
+                message = emsg,
                 duration = None,
                 title = "Tool Use Template Error",
             )
         try:
             chat_rag_output = tokenizer.apply_chat_template(messages, documents = documents or [], chat_template = template_rag, tokenize = False, **chat_template_kwargs) if template_rag else None
         except Exception as e:
+            emsg = f"Line {e.lineno}: " if hasattr(e, "lineno") else ""
+            emsg += e.message if hasattr(e, "message") else str(e)
             gr.Warning(
-                message = str(e),
+                message = emsg,
                 duration = None,
                 title = "RAG Template Error",
             )
         try:
             inverse_output = tokenizer.apply_inverse_template(messages, inverse_template = template_inverse, **chat_template_kwargs) if template_inverse else None
         except Exception as e:
+            emsg = f"Line {e.lineno}: " if hasattr(e, "lineno") else ""
+            emsg += e.message if hasattr(e, "message") else str(e)
             gr.Warning(
-                message = str(e),
+                message = emsg,
                 duration = None,
                 title = "Inverse Template Error",
             )