Due to a problem with the Intel® FPGA SDK for OpenCL™ software technology, you may see this error after a long compilation time. This is caused by a large number of storage operations to undefined elements performed by the h_updating_graph_mask_buf_0 and h_graph_visited_buf_0 arrays functions.
Intel Software: Quartus Prime
Last Modified: September 24, 2018
Version Found: v17.1 Update 2
Bug ID: FB: 516662;