Test fail

[Joezczhang]

Hello:

when I test this extension with command make installcheck,ERROR named desired number of counters is higher than the topn.number_of_counters variable happened, just like blow:

test add_agg ... ok 427 ms
test union_agg ... ok 235 ms
test char_tests ... FAILED 44 ms
test null_tests ... ok 23 ms
test add_union_tests ... FAILED 77 ms
test copy_data ... ok 2254 ms
test customer_reviews_query ... ok 1840 ms
test join_tests ... FAILED 819 ms

information in char_tests.out:
SELECT (topn(topn_union_agg(jsonb_column), 9)).*
FROM jsonb_table;

•            item                 | frequency 
  

--------------------------------------+-----------

• TR | 6
• CH | 4
• US | 4
• FRA | 2
• ' | 1
• '"" +++--- <>?//#$%^&*()_+!@/t | 1
• \\ | 1
• '"" | 1
• """"" | 1
  -(9 rows)

+ERROR: desired number of counters is higher than the topn.number_of_counters variable
do
$$
declare
@@ -91,19 +79,7 @@
FROM values_table;
SELECT (topn(topn_union_agg(jsonb_column), 9)).*
FROM jsonb_table;

• item     | frequency 
  

---------------+-----------

• кйльжзхцвбнм | 35
• эасдфгч | 30
• тыуио | 20
• пющ | 12
• ёъяшер | 10
• TR | 9
• CH | 6
• US | 6
• FRA | 3
  -(9 rows)

+ERROR: desired number of counters is higher than the topn.number_of_counters variable
do
$$
declare

I find this error in function topn in topn.c,what confuses me is why SRF_IS_FIRSTCALL() is always true.

Hope for your help.