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YosysHQ / arachne-pnr

Place and route tool for FPGAs
MIT License
413 stars 73 forks source link

src/route.cc:725: void Router::route(): Assertion `cnet_net[cn] == nullptr || cnet_net[cn] == n' failed. #130

Closed smunaut closed 4 years ago

smunaut commented 5 years ago

bug.tar.gz

Attached is a small design that fails. (This particular one happens to work with next-pnr, but the "full" one actually fails in next-pnr too).

A work around I found was to leave the .LATCH_INPUT_VALUE inputs of the SB_IO floating and this fixes things.

smunaut commented 4 years ago

arachne-pnr is pretty much un-maintained ... closing.