Add test that provokes the race condition

tests/migrate_test.go

@@ -1685,3 +1685,29 @@ func TestTableType(t *testing.T) {
 		t.Fatalf("expected comment %s got %s", tblComment, comment)
 	}
 }
+
+func TestMigrateRaceCondition(t *testing.T) {
+	type TestTable struct {
+		gorm.Model
+	}
+
+	for a := 0; a < 2; a++ {
+		t.Run("drop and migrate", func(t *testing.T) {
+			t.Run("drop", func(t *testing.T) {
+				if err := DB.Migrator().DropTable(&TestTable{}); err != nil {
+					t.Fatalf("failed to drop table: %v", err)
+				}
+			})
+
+			for i := 0; i < 2; i++ {
+				t.Run("migrate", func(t *testing.T) {
+					t.Parallel()
+
+					if err := DB.AutoMigrate(&TestTable{}); err != nil {
+						t.Fatalf("failed to migrate: %v", err)
+					}
+				})
+			}
+		})
+	}
+}