6 files changed, 47 insertions, 5 deletions
diff --git a/src/compiler/scala/tools/nsc/backend/opt/ClosureElimination.scala b/src/compiler/scala/tools/nsc/backend/opt/ClosureElimination.scala
index c49f23852f..a866173a88 100644
--- a/src/compiler/scala/tools/nsc/backend/opt/ClosureElimination.scala
+++ b/src/compiler/scala/tools/nsc/backend/opt/ClosureElimination.scala
@@ -56,11 +56,8 @@ abstract class ClosureElimination extends SubComponent {
       case (BOX(t1), UNBOX(t2)) if (t1 == t2) =>
         Some(Nil)
 
-      case (LOAD_FIELD(sym, isStatic), DROP(_)) if !sym.hasAnnotation(definitions.VolatileAttr) =>
-        if (isStatic)
-          Some(Nil)
-        else
-          Some(DROP(REFERENCE(definitions.ObjectClass)) :: Nil)
+      case (LOAD_FIELD(sym, /* isStatic */false), DROP(_)) if !sym.hasAnnotation(definitions.VolatileAttr) && inliner.isClosureClass(sym.owner) =>
+        Some(DROP(REFERENCE(definitions.ObjectClass)) :: Nil)
 
       case _ => None
     }
diff --git a/src/compiler/scala/tools/nsc/backend/opt/DeadCodeElimination.scala b/src/compiler/scala/tools/nsc/backend/opt/DeadCodeElimination.scala
index 3c983e6fdf..18bf63e237 100644
--- a/src/compiler/scala/tools/nsc/backend/opt/DeadCodeElimination.scala
+++ b/src/compiler/scala/tools/nsc/backend/opt/DeadCodeElimination.scala
@@ -172,6 +172,11 @@ abstract class DeadCodeElimination extends SubComponent {
                  LOAD_EXCEPTION(_) | SWITCH(_, _) | MONITOR_ENTER() | MONITOR_EXIT() | CHECK_CAST(_) =>
               moveToWorkList()
 
+            case LOAD_FIELD(sym, isStatic) if isStatic || !inliner.isClosureClass(sym.owner) =>
+              // static load may trigger static initization.
+              // non-static load can throw NPE (but we know closure fields can't be accessed via a
+              // null reference.
+              moveToWorkList()
             case CALL_METHOD(m1, _) if isSideEffecting(m1) =>
               moveToWorkList()
 
diff --git a/test/files/run/t8601-closure-elim.flags b/test/files/run/t8601-closure-elim.flags
new file mode 100644
index 0000000000..49d036a887
--- /dev/null
+++ b/test/files/run/t8601-closure-elim.flags
@@ -0,0 +1 @@
+-optimize
diff --git a/test/files/run/t8601-closure-elim.scala b/test/files/run/t8601-closure-elim.scala
new file mode 100644
index 0000000000..2c5b03af77
--- /dev/null
+++ b/test/files/run/t8601-closure-elim.scala
@@ -0,0 +1,26 @@
+import scala.tools.partest.BytecodeTest
+import scala.tools.asm
+import scala.tools.asm.util._
+import scala.collection.JavaConverters._
+
+object Test extends BytecodeTest {
+  val nullChecks = Set(asm.Opcodes.NEW)
+
+  def show: Unit = {
+    def test(methodName: String) {
+      val classNode = loadClassNode("Foo")
+      val methodNode = getMethod(classNode, "b")
+      val ops = methodNode.instructions.iterator.asScala.map(_.getOpcode).toList
+      assert(!ops.contains(asm.Opcodes.NEW), ops)// should be allocation free if the closure is eliminiated
+    }
+    test("b")
+  }
+}
+
+class Foo {
+  @inline final def a(x: Int => Int) = x(1)
+  final def b {
+    val delta = 0
+    a(x => delta + 1)
+  }
+}
diff --git a/test/files/run/t8601c.flags b/test/files/run/t8601c.flags
new file mode 100644
index 0000000000..1182725e86
--- /dev/null
+++ b/test/files/run/t8601c.flags
@@ -0,0 +1 @@
+-optimize
+\ No newline at end of file
diff --git a/test/files/run/t8601c.scala b/test/files/run/t8601c.scala
new file mode 100644
index 0000000000..c487d6825e
--- /dev/null
+++ b/test/files/run/t8601c.scala
@@ -0,0 +1,12 @@
+object Test {
+  def loadField(x: scala.runtime.IntRef): Unit = x.elem
+  def storeField(x: scala.runtime.IntRef): Unit = x.elem = 42
+
+  def check(x: => Any) = try { x; sys.error("failed to throw NPE!") } catch { case _: NullPointerException => }
+
+  def main(args: Array[String]) {
+    check(loadField(null)) // bug: did not NPE under -Ydead-code
+    check(storeField(null))
+
+  }
+}