warning: ATTENTION!
This build uses unsafe internal compiler arguments:

-XXLanguage:+MultiPlatformProjects

This mode is not recommended for production use,
as no stability/compatibility guarantees are given on
compiler or generated code. Use it at your own risk!

warning: language version 2.0 is experimental, there are no backwards compatibility guarantees for new language and library features
error: source '$TESTDATA_DIR$/src/b.kt' does not belong to any module
COMPILATION_ERROR