Check: compiled code, Result: WARNING File 'polars/libs/x64/polars.dll': Found non-API calls to R: 'ENVFLAGS', 'FRAME', 'HASHTAB', 'PRCODE', 'PRENV', 'PRSEEN', 'PRVALUE', 'Rf_findVarInFrame3', 'SET_BODY', 'SET_CLOENV', 'SET_ENCLOS', 'SET_ENVFLAGS', 'SET_FORMALS', 'SET_PRCODE', 'SET_PRENV', 'SET_PRVALUE', 'STRING_PTR', 'SYMVALUE', 'XLENGTH_EX' These entry points may be removed soon: 'PRSEEN', 'SYMVALUE' Compiled code should not call non-API entry points in R. See 'Writing portable packages' in the 'Writing R Extensions' manual, and section 'Moving into C API compliance' for issues with the use of non-API entry points.