Forward-port of commit 59184.

- Backported a workaround for a bug in SQLite 3.2.x/3.3.x versions where a
  statement recompilation with no bound parameters lead to a segfault
- Backported a fix necessary because of an SQLite API change in version
  3.5.
  This prevents segfaults when executing empty queries, like our test suite
  does

1 files changed, 5 insertions, 1 deletions

diff --git a/Modules/_sqlite/statement.c b/Modules/_sqlite/statement.c
index 20c1aac..97d2e2a 100644
--- a/Modules/_sqlite/statement.c
+++ b/Modules/_sqlite/statement.c
@@ -237,7 +237,11 @@ int pysqlite_statement_recompile(pysqlite_Statement* self, PyObject* params)
          */
         #ifdef SQLITE_VERSION_NUMBER
         #if SQLITE_VERSION_NUMBER >= 3002002
-        (void)sqlite3_transfer_bindings(self->st, new_st);
+        /* The check for the number of parameters is necessary to not trigger a
+         * bug in certain SQLite versions (experienced in 3.2.8 and 3.3.4). */
+        if (sqlite3_bind_parameter_count(self->st) > 0) {
+            (void)sqlite3_transfer_bindings(self->st, new_st);
+        }
         #endif
         #else
         statement_bind_parameters(self, params);