rtl-bug-repro

To isolate a bug from a failing RTL simulation waveform, you generate a minimal SystemVerilog testbench that targets the specific failing module and trace the VCD waveform cycle-by-cycle to pinpoint the first signal divergence.

The best way to reproduce a failing RTL regression test is to scaffold a compact testbench using project clock and reset conventions, run targeted simulations, and document the failing cycle and hierarchical signal trace in a root cause report.

Yes, you need access to failing VCD or FST waveforms, project RTL sources, and simulator run scripts to perform cycle-by-cycle waveform comparison and trace the originating signal path.

You create a minimal testbench for module-level isolation by extracting the failing module context, applying project naming conventions, and executing targeted simulations to confirm the reproduction of the mismatched waveform.

A limitation of minimal RTL reproductions is the dependency on accessible failing VCD waveforms and simulator run scripts; without accurate project RTL sources, isolating the root cause of the simulation failure is not possible.