inference_failure_on_uninitialized_variable
The type of {0} can't be inferred without either a type or initializer.
Description
#The analyzer produces this diagnostic when
- the language option
strict-inference
has been enabled in the analysis options file, - the declaration of a variable doesn't have a type, and
- the type of the variable can't be inferred.
Example
#Given an analysis options file containing the following:
yaml
analyzer:
language:
strict-inference: true
The following code produces this diagnostic because the variable s
doesn't have an explicit type and the type can't be inferred because there's no initializer:
dart
var s;
Common fixes
#Add an explicit type:
dart
String? s;
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Provide details Unless stated otherwise, the documentation on this site reflects Dart 3.9.0. Page last updated on 2025-08-25. View source or report an issue.