These are the packages that would be merged, in order:

Calculating dependencies ...

!!! Problem resolving dependencies for =app-forensics/aflplusplus-4.30c
 done!
Dependency resolution took 0.85 s (backtrack: 0/20).


!!! The ebuild selected to satisfy "=app-forensics/aflplusplus-4.30c" has unmet requirements.
- app-forensics/aflplusplus-4.30c::gentoo USE="-test" LLVM_SLOT="19 -17 -18" PYTHON_SINGLE_TARGET="-python3_12 -python3_13"

  The following REQUIRED_USE flag constraints are unsatisfied:
    exactly-one-of ( python_single_target_python3_12 python_single_target_python3_13 )

  The above constraints are a subset of the following complete expression:
    exactly-one-of ( python_single_target_python3_12 python_single_target_python3_13 ) exactly-one-of ( llvm_slot_17 llvm_slot_18 llvm_slot_19 )