During February 2025, Daniel Thoma focused on enhancing the dotty-staging/dotty compiler by addressing a critical issue in LambdaMetafactory’s handling of non-primitive lambda return types. He identified and fixed a bug where return values were not correctly boxed, which previously led to compatibility issues with the Android ART runtime and downstream application errors. Working primarily in Scala and leveraging his expertise in compiler development and JVM backend internals, Daniel aligned the boxing behavior with Java LambdaMetafactory requirements. This targeted fix improved runtime stability and correctness for Android builds, demonstrating a deep understanding of cross-platform JVM interoperability and runtime constraints.