non_type_in_catch_clause
The name '{0}' isn't a type and can't be used in an on-catch clause.
Description
#The analyzer produces this diagnostic when the identifier following the on
in a catch
clause is defined to be something other than a type.
Example
#The following code produces this diagnostic because f
is a function, not a type:
dart
void f() {
try {
// ...
} on f {
// ...
}
}
Common fixes
#Change the name to the type of object that should be caught:
dart
void f() {
try {
// ...
} on FormatException {
// ...
}
}
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.