Hitting unimplemented code creating a big List

[DartBot]

This issue was originally filed by jcmel...@gmail.com

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• What steps will reproduce the problem?
  Running:

void main() {
  new List<int>(774909216);
}

• What is the expected output?
  Nothing
• What do you see instead?
  Shows ".\vm\object.cc:7695: error: unimplemented code" and VM crash
• What version of the product are you using? On what operating system?
  Revision 4562
  Windows 7 64 bits Ultimate

Set owner to @sgmitrovic.
Added Area-VM, Accepted labels.

FIxed in r4774

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Added Fixed label.