The reason for the bug was that omj/optimizer/Optimizer.java when optimizing code for this[name] (see GETELEM switch, line 665) assumed a number context for GETELEM index node unconditionally which is wrong.
The fix uses number context only if [] argument is known for sure to be a number.
git-svn-id: svn://10.0.0.236/trunk@137832 18797224-902f-48f8-a5cc-f745e15eee43