Test warnings when an indy cannot be inlined

There are two cases tested here
  - An indyLMF where the lambda body method is private
  - An indy where the bootstrap method is not LMF

2 files changed, 37 insertions, 0 deletions

diff --git a/test/files/run/noInlineUnknownIndy/A_1.java b/test/files/run/noInlineUnknownIndy/A_1.java
new file mode 100644
index 0000000000..a9144a9fa6
--- /dev/null
+++ b/test/files/run/noInlineUnknownIndy/A_1.java
@@ -0,0 +1,9 @@
+public class A_1 {
+  interface Fun {
+    String m(String s);
+  }
+  public static final String test() {
+    Fun f = s -> s.trim();
+    return f.m(" eh ");
+  }
+}
diff --git a/test/files/run/noInlineUnknownIndy/Test.scala b/test/files/run/noInlineUnknownIndy/Test.scala
new file mode 100644
index 0000000000..16d8126543
--- /dev/null
+++ b/test/files/run/noInlineUnknownIndy/Test.scala
@@ -0,0 +1,28 @@
+import java.io.File
+
+import scala.collection.convert.decorateAsScala._
+import scala.tools.asm.tree.{ClassNode, InvokeDynamicInsnNode}
+import scala.tools.asm.{Handle, Opcodes}
+import scala.tools.partest.BytecodeTest.modifyClassFile
+import scala.tools.partest._
+
+object Test extends DirectTest {
+  def code = ???
+
+  def compileCode(code: String) = {
+    val classpath = List(sys.props("partest.lib"), testOutput.path) mkString sys.props("path.separator")
+    compileString(newCompiler("-cp", classpath, "-d", testOutput.path, "-Yopt:l:classpath", "-Yopt-inline-heuristics:everything", "-Yopt-warnings:_"))(code)
+  }
+
+  def show(): Unit = {
+    val unknownBootstrapMethod = new Handle(Opcodes.H_INVOKESTATIC, "not/java/lang/SomeLambdaMetafactory", "notAMetaFactoryMethod", "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;")
+    modifyClassFile(new File(testOutput.toFile, "A_1.class"))((cn: ClassNode) => {
+      val testMethod = cn.methods.iterator.asScala.find(_.name == "test").head
+      val indy = testMethod.instructions.iterator.asScala.collect({ case i: InvokeDynamicInsnNode => i }).next()
+      indy.bsm = unknownBootstrapMethod
+      cn
+    })
+
+    compileCode("class T { def foo = A_1.test }")
+  }
+}