|Title:||Free-list corruption in incremental-vacuum mode|
|Last Modified:||2010-08-23 17:08:42|
|Version Found In:||3.7.1|
Running an incremental vacuum can result in free-list corruption in an obscure case. The case is hit if the incremental vacuum code attempts to extract the second of two empty free-list trunk pages (trunk pages with no references to free-list leaves), and the page extracted is not the last trunk page in the free-list.
Running integrity-check after this occurs produces output similar to:
*** in database main *** Main freelist: invalid page number 258 Page 6 is never used Page 7 is never used Page 8 is never used Page 9 is never used Page 10 is never used Page 11 is never used Page 12 is never used Page 13 is never used ...
This problem first appeared in 3.6.16.
drh added on 2010-08-23 17:08:42: