Monetdb Python UDF crashes because of null aggr_group_arr

[tle211212]

Hi MonetDB dev,

I encounter this MonetDB crash when I try out the Python UDF.

Test data:
sql>select * from integers;
+------+
| i |
+======+
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
| 9 |
| 10 |
+------+

sql> select python_sum(i) from integers where i = 1 group by i; ==> segfault

python_sum is just a simple PYTHON_MAP function: return numpy.sum(v);

When I rebuild MonetDB with debuginfo, this is where the code fails.
pyapi3.c
for (element_it = 0; element_it < elements; element_it++) {
group_counts[aggr_group_arr[element_it]]++; ==> aggr_group_arr is null
}

I hope you can fix it soon. Thank you.

[PedroTadim]

I already spotted the issue. The void BAT case is missing there.

[tle211212]

Thank you. I will pull the fix and test it next week.

[PedroTadim]

I am going to close it for now. If you still find any issue, please re-open. Thanks for the report!