STEP 0:
    rebuild klib: false
STEP 1:
    dependencies: lib1
    modifications:
        U : l2.1.kt -> l2.kt
    added file: l2.kt
STEP 2:
    dependencies: lib1
    modifications:
        U : l2.2.kt -> l2.kt
    modified ir: l2.kt
STEP 3:
    rebuild klib: false
    modifications:
        D : l2.kt
    removed file: l2.kt
STEP 4:
    rebuild klib: false
