oclvanitygen64.exe -S -v -D:0 -i  13Kv59
Prefix difficulty:             66026056 13Kv59
Difficulty: 66026056
Device: Hawaii
Vendor: Advanced Micro Devices, Inc. (1002)
Driver: 2639.5
Profile: FULL_PROFILE
Version: OpenCL 2.0 AMD-APP (2639.5)
Max compute units: 44
Max workgroup size: 256
Global memory: 0
Max allocation: -50331648
OpenCL compiler flags:
Compiling kernel, can take minutes...failure.
clBuildProgram: CL_BUILD_PROGRAM_FAILURE
Build log:
C:\Users\manot\AppData\Local\Temp\\OCL20940T3.cl:180:19: error: variable in constant address space must be initialized
__constant bignum bn_zero;
                  ^
C:\Users\manot\AppData\Local\Temp\\OCL20940T3.cl:180:19: error: constant address space qualified variables are required to be initialized
2 errors generated.

error: Clang front-end compilation failed!
Frontend phase failed compilation.
Error: Compiling CL to IR
Could not open device ':0', ignoring
Available OpenCL platforms:
0: [Advanced Micro Devices, Inc.] AMD Accelerated Parallel Processing
  0: [Advanced Micro Devices, Inc.] Hawaii
  1: [AuthenticAMD] AMD Ryzen 7 1800X Eight-Core Processor