Final int can be incremented

[DartBot]

This issue was originally filed by rice@google.com

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This bug was reported by wijnand.schepens@gmail.com over email.

The code:

main() {
  final a = 1;
  a++;
  print(a);
}

prints '2'. Should finals be incrementable?

[DartBot]

This comment was originally written by drfibonacci@google.com

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Added Area-Language, Triaged labels.

[DartBot]

This comment was originally written by mmendez@google.com

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Not sure if this was against the dartc or the VM. At a minimum, dartc fails to report an error/warning at a++.

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Added Area-Compiler label.

[gbracha]

finals are not incrementable. The operator ++ (in both prefix and postfix forms) is defined as a sugar for an assignment, and multiple assignments to finals are not allowed.

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Removed Area-Language label.

[DartBot]

This comment was originally written by zundel@google.com

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Fixed in r468
Thanks for the report!

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Added Fixed label.