checking package dependencies
compiling TestCReg_TooSmall.bsv
code generation for sysTestCReg_TooSmall starts
Error: "PreludeBSV.bsv", line 1002, column 37: (S0015)
  Bluespec evaluation-time error: `mkCReg' cannot have a negative number of
  ports
  During elaboration of `error' at "PreludeBSV.bsv", line 1002, column 13.
  During elaboration of `rg' at "TestCReg_TooSmall.bsv", line 5, column 19.
  During elaboration of `sysTestCReg_TooSmall' at "TestCReg_TooSmall.bsv",
  line 3, column 8.