Selection of an attribute by integer comparison does not work.

mstro_csq_parse(cdo_sel_parse.c:2983) CDO selector query parser error around string position 25 of |(.maestro.ecmwf.param = 2)| (looking at: |2)|)

mstro_selector_parse(cdo_sel_parse.peg:434) Failed to parse query |(.maestro.ecmwf.param = 2)|, syntax error

line was mstro_cdo_selector_create(nullptr, nullptr, "(.maestro.ecmwf.param = 2)", &selector);