Miner app https://github.com/arnuschky/primecoin-reaper.git crashes with 

./reaper 
\|||||||||||||||||||||/
-  Reaper v13 64-bit  -
-    PRIME BETA 2     -
-   coded by mtrlt    -
/|||||||||||||||||||||\


Warning: unknown property "use_gpu" in configuration file.
I'm now mining primecoin!
Share thread started
GeneratePrimeTable() : setting nSievePercentage = 1, nSieveSize = 100000
GeneratePrimeTable() : prime table [1, 100000] generated with 9592 primes
Available CPU mining algorithms: hp7
Using default: hp7
Creating 1 CPU thread.
1...Warning: can't set thread priority
done
List of platforms:
        0       Default
Using platform number 0

Using device 0
OpenCL device 0........
Compiling kernel... this could take up to 2 minutes.
2 warnings generated.
Building kernel CalculateMultipliers
Building kernel Sieve
Building kernel Combine
Building kernel Fermat
done
Compiling kernel... this could take up to 2 minutes.
2 warnings generated.
Building kernel CalculateMultipliers
Building kernel Sieve
Building kernel Combine
Building kernel Fermat
0x7f735cdadd00: i32 = GlobalAddress<i32 (...)* @atomic_or> 0 [ORD=104]
Stack dump:
0.      Running pass 'Function Pass Manager' on module 'radeon'.
1.      Running pass 'AMDGPU DAG->DAG Pattern Instruction Selection' on
function '@Sieve'
Segmentation fault