lidavidm opened a new issue, #729:
URL: https://github.com/apache/arrow-adbc/issues/729
```
$ go run
github.com/apache/arrow/go/v12/arrow/flight/flightsql/example/cmd/sqlite_flightsql_server@latest
-port 12345
```
Separately:
```
$ python -m venv venv
$ source venv/bin/activate
$ pip install pyarrow==10.0.1 adbc-driver-flightsql
```
Then run this script:
<details>
```python
import concurrent.futures
from concurrent.futures import ThreadPoolExecutor
import adbc_driver_flightsql.dbapi
import pyarrow
def task(conn):
with conn.cursor() as cur:
cur.execute("SELECT 1")
cur.fetch_arrow_table()
with adbc_driver_flightsql.dbapi.connect("grpc://localhost:12345") as conn:
with ThreadPoolExecutor() as ex:
while True:
futures = [ex.submit(task, conn) for _ in range(23)]
for future in concurrent.futures.as_completed(futures):
future.result()
```
</details>
The Go runtime should immediately crash:
```
runtime: marked free object in span 0x7f7bc8480ba8, elemsize=24 freeindex=0
(bad use of unsafe.Pointer? try -d=checkptr)
```
Technically, the concurrent `conn.cursor()` call here is not allowed. But
the crash seems to be unrelated to that; the crash won't occur if you comment
out `fetch_arrow_table` or replace it with `fetchone`.
It also won't happen if you have PyArrow 11, so it may be a regression in
PyArrow and not something we should be concerned about.
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