Nested @Mapping is ignored for unmapped source report #3839

Expected behavior

no error

Actual behavior

source property X is unmapped

Steps to reproduce the problem

try example https://mapstruct.org/documentation/stable/reference/html/#mapping-nested-bean-properties-to-current-target with unmappedSourcePolicy = ReportingPolicy.ERROR,

Also, when I have method with 2 arguments, I specify @Mapping(source = "arg1.field1.nestedField2") but then I only have to do @BeanMapping(ignoreUnmappedSourceProperties = "nestedField2") instead, might be another bug

MapStruct Version

1.6.3