unused_catch_stack
The stack trace variable '{0}' isn't used and can be removed.
Description
#The analyzer produces this diagnostic when the stack trace parameter in a catch
clause isn't referenced within the body of the catch
block.
Example
#The following code produces this diagnostic because stackTrace
isn't referenced:
dart
void f() {
try {
// ...
} catch (exception, stackTrace) {
// ...
}
}
Common fixes
#If you need to reference the stack trace parameter, then add a reference to it. Otherwise, remove it:
dart
void f() {
try {
// ...
} catch (exception) {
// ...
}
}
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.