avoid-nullable-tostring

added in: 1.13.0

warning

🛠

Pro+

preset: recommended

Warns when the toString method is called on a nullable value.

Calling toString on a nullable value can result in an unexpected output (e.g. 'null').

Example

❌ Bad:

void fn(String? nullableValue) {
  print(nullableValue.toString()); // LINT
}

✅ Good:

void fn(String? nullableValue) {
  print(nullableValue?.toString());
}