GraphQLException and GraphQLError

A GraphQLException is a list of GraphQLErrors. You can view the GraphQLError definition in the following code section:

/// An error that may occur during the execution of a GraphQL query.
///
/// This will almost always be passed to a [GraphQLException].
class GraphQLError implements Exception, GraphQLException {
  /// The reason execution was halted, whether it is a syntax error,
  /// or a runtime error, or some other exception.
  final String message;

  /// An optional list of locations within the source text where
  /// this error occurred.
  ///
  /// Smart tools can use this information to show end users exactly
  /// which part of the errant query
  /// triggered an error.
  final List<GraphQLErrorLocation> locations;

  /// List of field names with aliased names or 0‐indexed integers for list
  final List<Object>? path;

  /// The stack trace of the [sourceError]
  final StackTrace? stackTrace;

  /// An optional error Object to pass more information of the
  /// source of the problem for logging or other purposes
  final Object? sourceError;

  /// Extensions return to the client
  ///
  /// This could be used to send more
  /// information about the error, such as a specific error code.
  final Map<String, Object?>? extensions;

  /// An error that may occur during the execution of a GraphQL query.
  ///
  /// This will almost always be passed to a [GraphQLException].
  GraphQLError(
    this.message, {
    this.locations = const [],
    this.path,
    this.extensions,
    StackTrace? stackTrace,
    this.sourceError,
  }) : stackTrace = stackTrace ?? StackTrace.current;