invalid_use_of_null_value
An expression whose value is always 'null' can't be dereferenced.
Description
#The analyzer produces this diagnostic when an expression whose value will always be null
is dereferenced.
Example
#The following code produces this diagnostic because x
will always be null
:
dart
int f(Null x) {
return x.length;
}
Common fixes
#If the value is allowed to be something other than null
, then change the type of the expression:
dart
int f(String? x) {
return x!.length;
}
Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.