--- a/jdk/src/java.base/share/classes/java/lang/invoke/InvokerBytecodeGenerator.java	Tue Apr 11 11:24:12 2017 +0200
+++ b/jdk/src/java.base/share/classes/java/lang/invoke/InvokerBytecodeGenerator.java	Tue Apr 11 18:57:46 2017 +0200
@@ -73,6 +73,7 @@
     private static final String LL_SIG  = "(L" + OBJ + ";)L" + OBJ + ";";
     private static final String LLV_SIG = "(L" + OBJ + ";L" + OBJ + ";)V";
     private static final String CLASS_PREFIX = LF + "$";
+    private static final String SOURCE_PREFIX = "LambdaForm$";
 
     /** Name of its super class*/
     static final String INVOKER_SUPER_NAME = OBJ;
@@ -80,9 +81,6 @@
     /** Name of new class */
     private final String className;
 
-    /** Name of the source file (for stack trace printing). */
-    private final String sourceFile;
-
     private final LambdaForm lambdaForm;
     private final String     invokerName;
     private final MethodType invokerType;
@@ -109,8 +107,7 @@
         if (DUMP_CLASS_FILES) {
             className = makeDumpableClassName(className);
         }
-        this.className  = CLASS_PREFIX + className;
-        this.sourceFile = "LambdaForm$" + className;
+        this.className  = className;
         this.lambdaForm = lambdaForm;
         this.invokerName = invokerName;
         this.invokerType = invokerType;
@@ -173,6 +170,13 @@
         }
     }
 
+    private void maybeDump(final byte[] classFile) {
+        if (DUMP_CLASS_FILES) {
+            maybeDump(CLASS_PREFIX + className, classFile);
+        }
+    }
+
+    // Also used from BoundMethodHandle
     static void maybeDump(final String className, final byte[] classFile) {
         if (DUMP_CLASS_FILES) {
             java.security.AccessController.doPrivileged(
@@ -306,8 +310,9 @@
     private ClassWriter classFilePrologue() {
         final int NOT_ACC_PUBLIC = 0;  // not ACC_PUBLIC
         cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES);
-        cw.visit(Opcodes.V1_8, NOT_ACC_PUBLIC + Opcodes.ACC_FINAL + Opcodes.ACC_SUPER, className, null, INVOKER_SUPER_NAME, null);
-        cw.visitSource(sourceFile, null);
+        cw.visit(Opcodes.V1_8, NOT_ACC_PUBLIC + Opcodes.ACC_FINAL + Opcodes.ACC_SUPER,
+                CLASS_PREFIX + className, null, INVOKER_SUPER_NAME, null);
+        cw.visitSource(SOURCE_PREFIX + className, null);
         return cw;
     }
 
@@ -617,12 +622,11 @@
         return resolvedMember;
     }
 
-    private static MemberName lookupPregenerated(LambdaForm form) {
+    private static MemberName lookupPregenerated(LambdaForm form, MethodType invokerType) {
         if (form.customized != null) {
             // No pre-generated version for customized LF
             return null;
         }
-        MethodType invokerType = form.methodType();
         String name = form.kind.methodName;
         switch (form.kind) {
             case BOUND_REINVOKER: {
@@ -669,8 +673,10 @@
     /**
      * Generate customized bytecode for a given LambdaForm.
      */
-    static MemberName generateCustomizedCode(LambdaForm form, MethodType invokerType) {
-        MemberName pregenerated = lookupPregenerated(form);
+    static MemberName generateCustomizedCode(LambdaForm form) {
+        final MethodType invokerType = form.methodType();
+
+        MemberName pregenerated = lookupPregenerated(form, invokerType);
         if (pregenerated != null)  return pregenerated; // pre-generated bytecode
 
         InvokerBytecodeGenerator g = new InvokerBytecodeGenerator("MH", form, invokerType);
@@ -720,7 +726,7 @@
         bogusMethod(lambdaForm);
 
         final byte[] classFile = toByteArray();
-        maybeDump(className, classFile);
+        maybeDump(classFile);
         return classFile;
     }
 
@@ -1761,7 +1767,7 @@
         bogusMethod(invokerType);
 
         final byte[] classFile = cw.toByteArray();
-        maybeDump(className, classFile);
+        maybeDump(classFile);
         return classFile;
     }
 
@@ -1829,7 +1835,7 @@
         bogusMethod(dstType);
 
         final byte[] classFile = cw.toByteArray();
-        maybeDump(className, classFile);
+        maybeDump(classFile);
         return classFile;
     }