Use report_fatal_error before destroying input object on error.

src/IceCfgNode.cpp

 //===- subzero/src/IceCfgNode.cpp - Basic block (node) implementation -----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the CfgNode class, including the complexities
@@ skipping 791 matching lines @@
           if (IsLiveIn)
             ++LiveRegCount[Var->getRegNum()];
           LiveRegs.push_back(Var);
         }
       }
     }
     // Sort the variables by regnum so they are always printed in a
     // familiar order.
     std::sort(LiveRegs.begin(), LiveRegs.end(),
               [](const Variable *V1, const Variable *V2) {
-      return V1->getRegNum() < V2->getRegNum();
-    });
+                return V1->getRegNum() < V2->getRegNum();
+              });
     bool First = true;
     for (Variable *Var : LiveRegs) {
       if (!First)
         Str << ",";
       First = false;
       Var->emit(Func);
     }
   }
   Str << "\n";
 }
@@ skipping 413 matching lines @@
       if (!First)
         Str << ", ";
       First = false;
       Str << "%" << I->getName();
     }
     Str << "\n";
   }
 }
 
 } // end of namespace Ice