Fix BeanInfo generation for GenBCode

Author: lrytz

src/compiler/scala/tools/nsc/backend/jvm/BCodeHelpers.scala

@@ -1108,7 +1108,7 @@ abstract class BCodeHelpers extends BCodeTypes with BytecodeWriters {
 
       constructor.visitVarInsn(asm.Opcodes.ALOAD, 0)
       // push the class
-      constructor.visitLdcInsn(exemplar(cls).c)
+      constructor.visitLdcInsn(exemplar(cls).c.toASMType)
 
       // push the string array of field information
       constructor.visitLdcInsn(new java.lang.Integer(fieldList.length))

test/files/jvm/beanInfo.check

@@ -0,0 +1,6 @@
+property descriptors
+x -- int -- public int p.C.x() -- null
+y -- class java.lang.String -- public java.lang.String p.C.y() -- public void p.C.y_$eq(java.lang.String)
+z -- class scala.collection.immutable.List -- public scala.collection.immutable.List p.C.z() -- public void p.C.z_$eq(scala.collection.immutable.List)
+method descriptors
+f -- public p.C p.C.f()

test/files/jvm/beanInfo/C_1.scala

@@ -0,0 +1,9 @@
+package p
+
+@scala.beans.BeanInfo
+class C {
+  val x: Int = 0
+  var y: String = ""
+  var z: List[_] = Nil
+  def f: C = ???
+}

test/files/jvm/beanInfo/Test_2.scala

@@ -0,0 +1,17 @@
+object Test extends App {
+  val info = java.beans.Introspector.getBeanInfo(classOf[p.C])
+
+  println("property descriptors")
+
+  val pds = info.getPropertyDescriptors
+  for (pd <- pds) {
+    println(s"${pd.getName} -- ${pd.getPropertyType} -- ${pd.getReadMethod} -- ${pd.getWriteMethod}")
+  }
+
+  println("method descriptors")
+
+  val mds = info.getMethodDescriptors
+  for (md <- mds) {
+    println(s"${md.getName} -- ${md.getMethod}")
+  }
+}