Fetching DF segfaults when outputtypehandler is present #486
Description
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What versions are you using?
3.1.0, repro in python 3.9 and 3.12, issue is on client side I think, DB version is irrelevant -
Is it an error or a hang or a crash?
Hard crash, segfault -
What error(s) or behavior you are seeing?
Segmentation fault -
Does your application call init_oracle_client()?
Reproduces both in thin and thick mode -
Include a runnable Python script that shows the problem.
import oracledb # this is copy&paste from doc def output_type_handler(cursor, metadata): def out_converter(d): if isinstance(d, str): return f"{d} was a string" else: return f"{d} was not a string" if metadata.type_code is oracledb.DB_TYPE_NUMBER: return cursor.var( oracledb.DB_TYPE_VARCHAR, arraysize=cursor.arraysize, outconverter=out_converter, ) conn = oracledb.connect("...") # comment out the line below and the issue goes away conn.outputtypehandler = output_type_handler sql = "select 1 n from dual" t = conn.fetch_df_all(sql) print(t)