I'm not a flow expert, but any netlist in the reports\synthesis results directory on any medium or larger size project I have been toying with so far has fanout violations, somtimes even > 100 depending on the RTL.
The zipdiv testcase is an example when you do a grep on the signal pre_sign.
So either the netlists are not the one implemented or the fanout.log file is wrong. But as I said, I'm not a flow expert.
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