This SQL SELECT fts5_expr();
results in an AV here: https://sqlite.org/src/artifact/56dcbcbdc9029dd7?ln=145 Reason is that fts5ExprFunction() does not check for at least one argument to fts5_expr() here: http://sqlite.org/src/artifact/56dcbcbdc9029dd7?ln=1886 Ralf