Program: 166846
Project: 166846
Buggy source:
public void write(CompilationUnit compilationUnit){
  copySpaceAndComments();
  @Nullable PackageDeclaration packageDeclaration=compilationUnit.getPackage();
  if (packageDeclaration != null) {
    setPositionToEndOfNodeSpaceAndComments(packageDeclaration);
  }
  for (  Object importDeclarationObject : compilationUnit.imports()) {
    ImportDeclaration importDeclaration=(ImportDeclaration)importDeclarationObject;
    Name importDeclarationName=importDeclaration.getName();
    if (importDeclaration.isStatic())     throw sourceNotSupported("String_Node_Str");
    copySpaceAndComments();
    matchAndWrite("String_Node_Str","String_Node_Str");
    if (importDeclaration.isOnDemand()) {
      copySpaceAndComments();
      writeNode(importDeclarationName);
    }
 else {
      if (!(importDeclarationName instanceof QualifiedName))       throw sourceNotSupported("String_Node_Str");
      QualifiedName qualifiedName=(QualifiedName)importDeclarationName;
      copySpaceAndComments();
      writeNodeAtDifferentPosition(qualifiedName.getName());
      write("String_Node_Str");
      writeNode(qualifiedName);
    }
    copySpaceAndComments();
    matchAndWrite("String_Node_Str");
  }
  copySpaceAndComments();
  int previousIndent=0;
  if (packageDeclaration != null) {
    int previousPosition=getPosition();
    setPositionToStartOfNode(packageDeclaration);
    matchAndWrite("String_Node_Str","String_Node_Str");
    copySpaceAndComments();
    writeNode(packageDeclaration.getName());
    write("String_Node_Str");
    previousIndent=getTargetWriter().incrementAdditionalIndentation(getPreferredIndent());
    writeln();
    setPosition(previousPosition);
  }
  AbstractTypeDeclaration firstTypeDeclaration=(AbstractTypeDeclaration)compilationUnit.types().get(0);
  writeNode(firstTypeDeclaration);
  copySpaceAndComments();
  if (packageDeclaration != null) {
    getTargetWriter().setAdditionalIndentation(previousIndent);
    writeln();
    writeln("String_Node_Str");
  }
}

Fixed version (ground truth):
public void write(CompilationUnit compilationUnit){
  copySpaceAndComments();
  @Nullable PackageDeclaration packageDeclaration=compilationUnit.getPackage();
  if (packageDeclaration != null) {
    setPositionToEndOfNodeSpaceAndComments(packageDeclaration);
  }
  for (  Object importDeclarationObject : compilationUnit.imports()) {
    ImportDeclaration importDeclaration=(ImportDeclaration)importDeclarationObject;
    Name importDeclarationName=importDeclaration.getName();
    if (isThisName(importDeclarationName,"String_Node_Str")) {
      setPositionToEndOfNode(importDeclaration);
      continue;
    }
    if (importDeclaration.isStatic())     throw sourceNotSupported("String_Node_Str");
    copySpaceAndComments();
    matchAndWrite("String_Node_Str","String_Node_Str");
    if (importDeclaration.isOnDemand()) {
      copySpaceAndComments();
      writeNode(importDeclarationName);
    }
 else {
      if (!(importDeclarationName instanceof QualifiedName))       throw sourceNotSupported("String_Node_Str");
      QualifiedName qualifiedName=(QualifiedName)importDeclarationName;
      copySpaceAndComments();
      writeNodeAtDifferentPosition(qualifiedName.getName());
      write("String_Node_Str");
      writeNode(qualifiedName);
    }
    copySpaceAndComments();
    matchAndWrite("String_Node_Str");
  }
  copySpaceAndComments();
  int previousIndent=0;
  if (packageDeclaration != null) {
    int previousPosition=getPosition();
    setPositionToStartOfNode(packageDeclaration);
    matchAndWrite("String_Node_Str","String_Node_Str");
    copySpaceAndComments();
    writeNode(packageDeclaration.getName());
    write("String_Node_Str");
    previousIndent=getTargetWriter().incrementAdditionalIndentation(getPreferredIndent());
    writeln();
    setPosition(previousPosition);
  }
  AbstractTypeDeclaration firstTypeDeclaration=(AbstractTypeDeclaration)compilationUnit.types().get(0);
  writeNode(firstTypeDeclaration);
  copySpaceAndComments();
  if (packageDeclaration != null) {
    getTargetWriter().setAdditionalIndentation(previousIndent);
    writeln();
    writeln("String_Node_Str");
  }
}