Segfault in popcount example if I don't run printer pass about linker

[leonardt]

Here is the output of the printer pass

{"top":"global.top",
"namespaces":{
  "global":{
    "modules":{
      "Op":{
        "type":["Record",[
          ["I0","BitIn"],
          ["I1","BitIn"],
          ["I2","BitIn"],
          ["O","Bit"]
        ]],
        "instances":{
          "inst0":{
            "modref":"global.and_wrapped"
          },
          "inst1":{
            "modref":"global.and_wrapped"
          },
          "inst2":{
            "modref":"global.and_wrapped"
          },
          "inst3":{
            "modref":"global.Or3xNone"
          }
        },
        "connections":[
          ["self.I0","inst0.I0"],
          ["self.I1","inst0.I1"],
          ["inst3.I0","inst0.O"],
          ["self.I1","inst1.I0"],
          ["self.I2","inst1.I1"],
          ["inst3.I1","inst1.O"],
          ["self.I2","inst2.I0"],
          ["self.I0","inst2.I1"],
          ["inst3.I2","inst2.O"],
          ["self.O","inst3.O"]
        ]
      },
      "Or3xNone":{
        "type":["Record",[
          ["I0","BitIn"],
          ["I1","BitIn"],
          ["I2","BitIn"],
          ["O","Bit"]
        ]],
        "instances":{
          "inst0":{
            "genref":"coreir.orr",
            "genargs":{"width":["Int",3]}
          }
        },
        "connections":[
          ["self.I0","inst0.in.0"],
          ["self.I1","inst0.in.1"],
          ["self.I2","inst0.in.2"],
          ["self.O","inst0.out"]
        ]
      },
      "and_wrapped":{
        "type":["Record",[
          ["I0","BitIn"],
          ["I1","BitIn"],
          ["O","Bit"]
        ]],
        "instances":{
          "inst0":{
            "modref":"corebit.and"
          }
        },
        "connections":[
          ["self.I0","inst0.in0"],
          ["self.I1","inst0.in1"],
          ["self.O","inst0.out"]
        ]
      },
      "fold_xor3None":{
        "type":["Record",[
          ["I0","BitIn"],
          ["I1","BitIn"],
          ["I2","BitIn"],
          ["O","Bit"]
        ]],
        "instances":{
          "inst0":{
            "modref":"global.xor_wrapped"
          },
          "inst1":{
            "modref":"global.xor_wrapped"
          }
        },
        "connections":[
          ["self.I0","inst0.I0"],
          ["self.I1","inst0.I1"],
          ["inst1.I0","inst0.O"],
          ["self.I2","inst1.I1"],
          ["self.O","inst1.O"]
        ]
      },
      "top":{
        "type":["Record",[
          ["I",["Array",16,"BitIn"]],
          ["O",["Array",5,"Bit"]]
        ]],
        "instances":{
          "popcount16":{
            "genref":"rosslib.PopCount",
            "genargs":{"width":["Int",16]}
          }
        },
        "connections":[
          ["self.I","popcount16.I"],
          ["self.O","popcount16.O"]
        ]
      },
      "xor_wrapped":{
        "type":["Record",[
          ["I0","BitIn"],
          ["I1","BitIn"],
          ["O","Bit"]
        ]],
        "instances":{
          "inst0":{
            "modref":"corebit.xor"
          }
        },
        "connections":[
          ["self.I0","inst0.in0"],
          ["self.I1","inst0.in1"],
          ["self.O","inst0.out"]
        ]
      }
    }
  }
}
}

[rdaly525]

Fixed by removing cullgraph