> cpmoptimize.recompiler.RecompilationError: Can't optimize loop: Unsupported instruction (LOAD_ATTR, 'b') at line 12 in fib, file "test.py"
> cpmoptimize.recompiler.RecompilationError: Can't optimize loop: Unsupported instruction (LOAD_ATTR, 'b') at line 12 in fib, file "test.py"