Fixed indirectly - but only if you can point to a code fix for another defect that actually resolves the issue so that you know it won't happen again.
No longer occurs - can't point to a fix but you can no longer reproduce the defect. This defect may pop up again if another defect code fix is just covering up the issue. You want to clarify that you can't point to a specific code change.
Testing is not an art (that is unless your definition of art includes breaking other "art").