BUG #11761: range_in dosn't work via direct functional call

The following bug has been logged on the website:

Bug reference: 11761
Logged by: Oleg
Email address: olegjobs(at)mail(dot)ru
PostgreSQL version: 9.3.2
Operating system: Ubuntu 64 14.04
Description:

This function test_ext_get_range(cstring) returns int4range:

Datum test_ext_get_range(PG_FUNCTION_ARGS)
{
char *ts = PG_GETARG_CSTRING(0);

return DirectFunctionCall3(range_in, CStringGetDatum(ts),
ObjectIdGetDatum(3904), Int32GetDatum(0);
}
In psql:
select test_ext_get_range('[1,1]');
error:
connection to the server was lost.

it seems to me that some memory problems because of "The range I/O functions
need a bit more cached info than other range
* functions, so they store a RangeIOData struct in fn_extra, not just a
* pointer to a type cache entry. "