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migration28.scala:5: error: method ++= in class Stack has changed semantics:
Stack ++= now pushes arguments on the stack from left to right.
s ++= List(1,2,3)
^
migration28.scala:7: error: method foreach in class Stack has changed semantics:
Stack iterator and foreach now traverse in FIFO order.
s foreach (_ => ())
^
two errors found
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