Hi all. I work on HHVM, Facebook's PHP JIT compiler. We're currently on SQLite 3.30, and we've been noticing rare SIGBUS errors blaming within SQLite code. The stack trace tends to look like this: ``` sqlite3WalFindFrame.constprop.0 readDbPage getPageNormal moveToLeftmost sqlite3VdbeExec sqlite3_step sqlite3_exec HPHP::Facts::(anonymous namespace)::AutoloadDBImpl::analyze() ``` I'm simply executing a prepared `ANALYZE` query statement. The DB is stored on a disk that has plenty of free space left. I don't have a reproducible repro, but I'm mostly asking exploratory questions at this stage. How can we prevent these SIGBUS errors in our application? I saw that, in 2012, [this ticket](https://www.sqlite.org/src/tktview/5eaa61ea1881040b1744) in 2012 led to [this bugfix](https://www.sqlite.org/src/info/356259617cfad044) in SQLite's code. Could this potentially be a bug in SQLite that we can help triage? Thank you! Jeff