unused_catch_clause
The exception variable '{0}' isn't used, so the 'catch' clause can be removed.
Description
#The analyzer produces this diagnostic when a catch
clause is found, and neither the exception parameter nor the optional stack trace parameter are used in the catch
block.
Example
#The following code produces this diagnostic because e
isn't referenced:
dart
void f() {
try {
int.parse(';');
} on FormatException catch (e) {
// ignored
}
}
Common fixes
#Remove the unused catch
clause:
dart
void f() {
try {
int.parse(';');
} on FormatException {
// ignored
}
}
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.