JDK-2183605 : Reintroduce Scope.dble
  • Type: Backport
  • Backport of: JDK-6460352
  • Component: tools
  • Sub-Component: javac
  • Priority: P3
  • Status: Closed
  • Resolution: Fixed
  • Submitted: 2009-09-30
  • Updated: 2012-10-03
  • Resolved: 2011-05-17
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JDK 6 JDK 7
6-poolResolved 7 b118Fixed
Comments
EVALUATION The problem is that the scope chains are used to contain entries with the same name, and entries with different names with the same hash value. When the hash table needs to be expanded, the names are not correctly mapped into the new table. The proposed fix is to use "open addressing" such that each hash bucket only contains a single entry (or in the case here, entries with the same name.) Names with the same hash value use a secondary hash to find an available empty bucket. More details here: http://en.wikipedia.org/wiki/Open_addressing
27-10-2010
EVALUATION Just need to do a deep copy of entries in dupUnshared. Best way to test this is to reduce the initial size of scopes, eg. 4. With such a value, langtools itself fails to compile.
30-09-2009