Dart2js does not accept "x = (){return 42;}()" in initializer list.

[lrhn]

Example code:

class C {
 final int x;
 C() : x = (){ return 42; }();
}

main() {
  print(new C().x);
}

This errs with the message:
initcall.dart:3:28: unexpected token '('
 C() : x = (){ return 42; }();

The grammar allows the syntax.

[kasperl]

Added this to the Later milestone.
Removed Priority-Unassigned label.
Added Priority-Medium label.

[DartBot]

This comment was originally written by @mhausner

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See issue #11509. I think this is a spec issue, not a compiler bug.

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cc @gbracha.

[DartBot]

This comment was originally written by @mhausner

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It's a defect in the grammar.

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Added Duplicate label.
Marked as being merged into #11509.

[peter-ahe-google]

Thank you for keeping us updated, Matthias!