Fix for public final fields.

References SI-3569.  Probably needs refinement.

Author: paulp

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

@@ -824,6 +824,7 @@ abstract class GenJVM extends SubComponent with GenJVMUtil with GenAndroid with
 
     def genField(f: IField) {
       debuglog("Adding field: " + f.symbol.fullName)
+      
       val jfield = jclass.addNewField(
         javaFlags(f.symbol) | javaFieldFlags(f.symbol),
         javaName(f.symbol),
@@ -1904,6 +1905,7 @@ abstract class GenJVM extends SubComponent with GenJVMUtil with GenAndroid with
          ((sym.rawflags & (Flags.FINAL | Flags.MODULE)) != 0)
       && !sym.enclClass.isInterface
       && !sym.isClassConstructor
+      && (sym.isLazy || sym.getter.isPrivate || !sym.isMutable)  // fix for SI-3569, is it sufficient?
     )
 
     mkFlags(

test/files/run/t3569.check

@@ -0,0 +1,14 @@
+1
+private final int Test$X.x2
+private final int Test$X.x3
+private final int Test$X.x5
+private final int Test$X.x6
+private final int Test$X.x7
+private int Test$X.x4
+private volatile int Test$X.bitmap$priv$0
+public int Test$X.x
+public volatile int Test$X.bitmap$0
+private int Test$Y.z1
+public int Test$Y.x
+public int Test$Y.y
+public int Test$Y.z2

test/files/run/t3569.flags

@@ -0,0 +1 @@
+-Yinline

test/files/run/t3569.scala

@@ -0,0 +1,24 @@
+object Test {
+  lazy val lv = scala.util.Random.nextInt()
+  
+  class X(final var x: Int)  {
+    final private[this] var x2: Int = 0
+    final var x3: Int = 0
+    private[this] var x4: Int = 0
+    final private[this] var x5: Int = 0
+    final lazy val x6: Int = 0
+    final private[this] lazy val x7: Int = 0
+  }
+  case class Y(final var x: Int, final private var y: Int, var z1: Int, private var z2: Int) { }
+  
+  def f = new X(0).x += 1
+  def main(args: Array[String]) {
+    f
+    val s = new X(0)
+    s.x += 1
+    println(s.x)
+    
+    (classOf[X].getDeclaredFields map ("" + _)).sorted foreach println
+    (classOf[Y].getDeclaredFields map ("" + _)).sorted foreach println
+  }
+}