From cad8b719434efb6ddf78c1b8d0a2c2fce1eba44d Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Wed, 29 Jul 2026 09:04:45 +0900
Subject: [PATCH] Reject nil module and nil BestIndex result

---
 sqlite3_opt_vtable.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sqlite3_opt_vtable.go b/sqlite3_opt_vtable.go
index 9e916ea..8095d26 100644
--- a/sqlite3_opt_vtable.go
+++ b/sqlite3_opt_vtable.go
@@ -451,6 +451,9 @@ func goVBestIndex(pVTab unsafe.Pointer, icp unsafe.Pointer) *C.char {
 	if err != nil {
 		return mPrintf("%s", err.Error())
 	}
+	if res == nil {
+		return mPrintf("%s", "BestIndex returned a nil IndexResult")
+	}
 	if len(res.Used) != len(csts) {
 		return mPrintf("Result.Used != expected value", "")
 	}
@@ -708,5 +711,5 @@ func (c *SQLiteConn) CreateModule(moduleName string, module Module) error {
 		}
 		return nil
 	}
-	return nil
+	return fmt.Errorf("sqlite3: CreateModule requires a non-nil module")
 }