[LUCENE-5272] OpenBitSet.ensureCapacity does not modify numBits

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.6, 6.0
• Component/s: core/index
• Lucene Fields: New, Patch Available
• Assignee: Shai Erera
• Reporter: Shai Erera
• Created: 10/Oct/13 05:23
• Updated: 28/Aug/22 13:54
• Resolved: 14/Oct/13 21:11

Description

It's a simple bug, reproduced by this simple test:

  public void testEnsureCapacity() {
    OpenBitSet bits = new OpenBitSet(1);
    bits.fastSet(0);
    bits.ensureCapacity(5); // make room for more bits
    bits.fastSet(2);
  }

The problem is that numBits which is used only for assrets isn't modified by ensureCapacity and so the next fastSet trips the assert. I guess we should also fix ensureCapacityWords and test it too.

I may not be able to fix this until Sunday though, so if anyone wants to fix it before (maybe it can make it into 4.5.1), feel free.