#1334 multiple conflicting drivers gives warning in synth and did not stop the flow Issue created by mbaykenar Prompt For mpw7 tapeout, I wrongly connected output of a module inside the top module to one of the bits of the io_in input signal. This gave warning in synth stage stating: "13. Executing CHECK pass (checking for obvious problems). Checking module user_project_wrapper... Warning: multiple conflicting drivers for user_project_wrapper.\io_in [16]: port tdo_o[0] of cell core_region_i (mba_core_region) module input io_in[16]" The tool did not stop until LVS stage This causes waste of time since multiple drive should not be acceptable in RTL to continue on flow Proposal Openlane should give error instead of warning in synth stage for multiple conflicting driver issue The-OpenROAD-Project/OpenLane