Merge pull request #6239 from dotty-staging/fix/i4523

Fix #4523: Add regression test to ensure we generate no bytecode for inline

Author: nicolasstucki

tests/run/i4523.check

@@ -0,0 +1,4 @@
+private static final int C.foo$$anonfun$1(int)
+private static final void C.notfive$1(int)
+private static java.lang.Object C.$deserializeLambda$(java.lang.invoke.SerializedLambda)
+public scala.collection.Seq C.foo()

tests/run/i4523.scala

@@ -0,0 +1,16 @@
+class C {
+  inline def one = 1
+  def foo = {
+    def notfive(i: Int) = println(i)
+    inline def five = one + 4
+    Seq(5).map { i =>
+      i + five
+    }
+  }
+}
+
+object Test {
+  def main(args: Array[String]): Unit = {
+    classOf[C].getDeclaredMethods.map(_.toString).sorted.foreach(println)
+  }
+}