Enhancement

• Relax strictness for Mapping#qualifiedByName and Mapping#qualifier for collection mappings (#2324, #2346)
• Mark mapstruct-processor jar as Spring-Boot-Jar-Type: annotation-processor (#2244)

Bugs

• Nested target properties uses same method for different mappings after upgrade from 1.3.1.Final to 1.4.1.Final (#2236)
• MapStruct 1.3.0.Final version is generating wrong code for optional collection getter fields (#2233)
• Problems with Optional<T> mapping (#2295)
• Nested source null check calls method twice instead of using intermediate variable (#2245)
• Mapper create invalid implementation - variable is already defined in method (#2251)
• Stack Trace instead of Message on Missing Mapping (#2263)
• Wrong reporting for unmapped source properties when source source is implicitly mapped (#2253)
• Getting either "Unknown property" or "Unmapped target property" (#2301)
• @InheritInverseConfiguration and @Mapping(target:"bean.childProperty", ignore=true) do not play together (#2278)
• Mappings are ignored when @InheritConfiguration defines a mapping for a sub-field (#2318)

Documentation

• Vague documentation and code samples of @Default annotation as of 1.4.X (#2258)
• Example uses wrong maven plugin configuration (#2307)
• Typo in @MapperConfig annotation in documentation (#2293)