minimal reproduce Nested Instantiate bug

src/test/scala/chiselTests/experimental/hierarchy/InstantiateSpec.scala

@@ -5,6 +5,7 @@ package experimental.hierarchy
 
 import chisel3._
 import chisel3.util.Valid
+import chisel3.properties._
 import chisel3.experimental.hierarchy._
 import circt.stage.ChiselStage.convert
 import chisel3.experimental.{ExtModule, IntrinsicModule}
@@ -163,13 +164,26 @@ object InstantiateSpec {
     @public val in = IO(Input(UInt(8.W)))
     @public val out = IO(Output(UInt(8.W)))
   }
+
+  @instantiable
+  class Bar extends Module {
+    @public val o = IO(Output(Bool()))
+    @public val i = IO(Input(Bool()))
+    o := i
+  }
+  @instantiable
+  class Foo(i: Int) extends Module {
+    val bar = Instantiate(new Bar)
+  }
 }
 
+
 class ParameterizedReset(hasAsyncNotSyncReset: Boolean) extends Module {
   override def resetType = if (hasAsyncNotSyncReset) Module.ResetType.Asynchronous else Module.ResetType.Synchronous
 }
 
 class InstantiateSpec extends ChiselFunSpec with Utils {
+
   import InstantiateSpec._
 
   describe("Module classes that take no arguments") {
@@ -475,4 +489,12 @@ class InstantiateSpec extends ChiselFunSpec with Utils {
       )
     )
   }
+
+  it("Nested Instantiate should work") {
+    class MyTop extends Top {
+      val inst0 = Instantiate(new Foo(1))
+      val inst1 = Instantiate(new Foo(2))
+    }
+    assert(convert(new MyTop).modules.map(_.name).sorted == Seq("Top", "Foo", "Foo_1", "Bar").sorted)
+  }
 }