avoid-non-final-exception-class-fields

added in: 1.22.0

warning

Pro+

Warns when an exception class declaration has non-final fields.

Example

❌ Bad:

class CaughtException implements Exception {
  final Object exception;

  final String? message;

  StackTrace stackTrace; // LINT

  CaughtException(Object exception, StackTrace stackTrace)
      : this.withMessage(null, exception, stackTrace);

  CaughtException.withMessage(this.message, this.exception, this.stackTrace);
}

✅ Good:

class CaughtException implements Exception {
  final Object exception;

  final String? message;

  final StackTrace stackTrace;

  CaughtException(Object exception, StackTrace stackTrace)
      : this.withMessage(null, exception, stackTrace);

  CaughtException.withMessage(this.message, this.exception, this.stackTrace);
}