test: 更新 Bug1 测试用例

playground/BugFarm/Bug1/Main.snow

@@ -1,17 +1,21 @@
 module: Main
     function: main
-        parameter:
         return_type: int
         body:
-           declare n1: int =1
-           declare n2: int =2
-           declare n3: int =1
-           if n1 ==1 then
-              if n2 ==2 then
-              n3 =3
+            foo()
+
+            return 0
+        end body
+    end function
+
+    function: foo
+        return_type: int
+        body:
+            if false then
+                return 1
             end if
-           end if
-        return n3
+
+            return 0
         end body
     end function
 end module