Program: 33267
Project: 33267
Buggy source:
public static URI create(final ContextURL contextURL){
  StringBuilder result=new StringBuilder();
  if (contextURL.getServiceRoot() != null) {
    result.append(contextURL.getServiceRoot());
  }
 else   if (contextURL.getODataPath() != null) {
    String oDataPath=contextURL.getODataPath();
    char[] chars=oDataPath.toCharArray();
    for (int i=1; i < chars.length - 1; i++) {
      if (chars[i] == '/' && chars[i - 1] != '/') {
        result.append("String_Node_Str");
      }
    }
  }
  result.append(Constants.METADATA);
  if (contextURL.getEntitySetOrSingletonOrType() != null) {
    result.append('#');
    if (contextURL.isCollection()) {
      result.append("String_Node_Str").append(Encoder.encode(contextURL.getEntitySetOrSingletonOrType())).append("String_Node_Str");
    }
 else {
      result.append(Encoder.encode(contextURL.getEntitySetOrSingletonOrType()));
    }
  }
  if (contextURL.getDerivedEntity() != null) {
    if (contextURL.getEntitySetOrSingletonOrType() == null) {
      throw new IllegalArgumentException("String_Node_Str");
    }
    result.append('/').append(Encoder.encode(contextURL.getDerivedEntity()));
  }
  if (contextURL.getKeyPath() != null) {
    result.append('(').append(contextURL.getKeyPath()).append(')');
  }
  if (contextURL.getNavOrPropertyPath() != null) {
    result.append('/').append(contextURL.getNavOrPropertyPath());
  }
  if (contextURL.getSelectList() != null) {
    result.append('(').append(contextURL.getSelectList()).append(')');
  }
  if (contextURL.isReference()) {
    if (contextURL.getEntitySetOrSingletonOrType() != null) {
      throw new IllegalArgumentException("String_Node_Str");
    }
    if (contextURL.isCollection()) {
      result.append('#');
      result.append("String_Node_Str").append(ContextURL.Suffix.REFERENCE.getRepresentation()).append("String_Node_Str");
    }
 else {
      result.append('#').append(ContextURL.Suffix.REFERENCE.getRepresentation());
    }
  }
 else   if (contextURL.getSuffix() != null) {
    if (contextURL.getEntitySetOrSingletonOrType() == null) {
      throw new IllegalArgumentException("String_Node_Str");
    }
    result.append('/').append(contextURL.getSuffix().getRepresentation());
  }
  return URI.create(result.toString());
}

Fixed version (ground truth):
public static URI create(final ContextURL contextURL){
  StringBuilder result=new StringBuilder();
  if (contextURL.getServiceRoot() != null) {
    result.append(contextURL.getServiceRoot());
  }
 else   if (contextURL.getODataPath() != null) {
    String oDataPath=contextURL.getODataPath();
    char[] chars=oDataPath.toCharArray();
    for (int i=1; i < chars.length - 1; i++) {
      if (chars[i] == '/' && chars[i - 1] != '/') {
        result.append("String_Node_Str");
      }
    }
  }
  result.append(Constants.METADATA);
  if (contextURL.getEntitySetOrSingletonOrType() != null) {
    result.append('#');
    if (contextURL.isCollection()) {
      result.append("String_Node_Str").append(Encoder.encode(contextURL.getEntitySetOrSingletonOrType())).append("String_Node_Str");
    }
 else {
      result.append(Encoder.encode(contextURL.getEntitySetOrSingletonOrType()));
    }
  }
  if (contextURL.getDerivedEntity() != null) {
    if (contextURL.getEntitySetOrSingletonOrType() == null) {
      throw new IllegalArgumentException("String_Node_Str");
    }
    result.append('/').append(Encoder.encode(contextURL.getDerivedEntity()));
  }
  if (contextURL.getKeyPath() != null) {
    result.append('(').append(contextURL.getKeyPath()).append(')');
  }
  if (contextURL.getNavOrPropertyPath() != null) {
    result.append('/').append(contextURL.getNavOrPropertyPath());
  }
  if (contextURL.getSelectList() != null) {
    result.append('(').append(contextURL.getSelectList()).append(')');
  }
  if (contextURL.isReference()) {
    if (contextURL.getEntitySetOrSingletonOrType() != null) {
      throw new IllegalArgumentException("String_Node_Str");
    }
    if (contextURL.isCollection()) {
      result.append('#').append("String_Node_Str").append(ContextURL.Suffix.REFERENCE.getRepresentation()).append("String_Node_Str");
    }
 else {
      result.append('#').append(ContextURL.Suffix.REFERENCE.getRepresentation());
    }
  }
 else   if (contextURL.getSuffix() != null) {
    if (contextURL.getEntitySetOrSingletonOrType() == null) {
      throw new IllegalArgumentException("String_Node_Str");
    }
    result.append('/').append(contextURL.getSuffix().getRepresentation());
  }
  return URI.create(result.toString());
}