SQL query hangs or crashes - sqlite

Question

Following code on Go 1.16.6 hangs on last Exec call (or crashes if same functions are called from different goroutines)
Both libraries "github.com/mattn/go-sqlite3" and "modernc.org/sqlite" give same results
package main
import (
"os"
"testing"
"database/sql"
_ "github.com/mattn/go-sqlite3"
// _ "modernc.org/sqlite"
)
func Test_Bug3(t *testing.T) {
DBPath := "test.db"
os.Remove(DBPath)
DB, err := sql.Open("sqlite3", DBPath)
if err != nil {
t.Fatalf("%s: %v", DBPath, err)
}
if _, err := DB.Exec(`CREATE TABLE IF NOT EXISTS verdictcache (sha1 text);`); err != nil {
t.Fatalf("%s: %v", DBPath, err)
}
_, err = DB.Exec("INSERT OR REPLACE INTO verdictcache (sha1) VALUES ($1)", "a")
if err != nil {
t.Fatalf("%s: %v", DBPath, err)
}
_, err = DB.Query("SELECT * FROM verdictcache WHERE sha1=$1", "a")
if err != nil {
t.Fatalf("%s: %v", DBPath, err)
}
_, err = DB.Exec("INSERT OR REPLACE INTO verdictcache (sha1) VALUES ($1)", "b")
if err != nil {
t.Fatalf("%s: %v", DBPath, err)
}
}

Answer 1

What is happening is almost certainly that you did not call Close() (or otherwise consumed the rows) on the result returned by DB.Query(...).
Try:
func Test_Bug3(t *testing.T) {
DBPath := "test.db"
os.Remove(DBPath)
DB, err := sql.Open("sqlite3", DBPath)
if err != nil {
t.Fatalf("%s: %v", DBPath, err)
}
if _, err := DB.Exec(`CREATE TABLE IF NOT EXISTS verdictcache (sha1 text);`); err != nil {
t.Fatalf("%s: %v", DBPath, err)
}
_, err = DB.Exec("INSERT OR REPLACE INTO verdictcache (sha1) VALUES ($1)", "a")
if err != nil {
t.Fatalf("%s: %v", DBPath, err)
}
res, err := DB.Query("SELECT * FROM verdictcache WHERE sha1=$1", "a")
if err != nil {
t.Fatalf("%s: %v", DBPath, err)
}
res.Close()
_, err = DB.Exec("INSERT OR REPLACE INTO verdictcache (sha1) VALUES ($1)", "b")
if err != nil {
t.Fatalf("%s: %v", DBPath, err)
}
}