105             try {
 106                 classFile = compile(testFile);
 107             } catch (Error err) {
 108                 System.err.println("fail compile. Source:\n" + srcString);
 109                 throw err;
 110             }
 111         }
 112         return classFile;
 113     }
 114 
 115     static File writeTestFile(String fname, String source) throws IOException {
 116         File f = new File(fname);
 117           PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
 118           out.println(source);
 119           out.close();
 120           return f;
 121     }
 122 
 123     static File compile(File f) {
 124         int rc = com.sun.tools.javac.Main.compile(new String[] {
 125                 "-source", "1.8", "-g", f.getPath() });
 126         if (rc != 0)
 127                 throw new Error("compilation failed. rc=" + rc);
 128             String path = f.getPath();
 129             return new File(path.substring(0, path.length() - 5) + ".class");
 130     }
 131 
 132     static void debugln(String str) {
 133         if(IS_DEBUG)
 134             System.out.println(str);
 135     }
 136 
 137     enum BSMSpecifier {
 138         SPECIFIER1("REF_invokeStatic java/lang/invoke/LambdaMetafactory metaFactory " +
 139                 "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;" +
 140                 "Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)" +
 141                 "Ljava/lang/invoke/CallSite;"),
 142         SPECIFIER2("REF_invokeStatic java/lang/invoke/LambdaMetafactory altMetaFactory " +
 143                         "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;" +
 144                         "[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;");
 145 

 105             try {
 106                 classFile = compile(testFile);
 107             } catch (Error err) {
 108                 System.err.println("fail compile. Source:\n" + srcString);
 109                 throw err;
 110             }
 111         }
 112         return classFile;
 113     }
 114 
 115     static File writeTestFile(String fname, String source) throws IOException {
 116         File f = new File(fname);
 117           PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
 118           out.println(source);
 119           out.close();
 120           return f;
 121     }
 122 
 123     static File compile(File f) {
 124         int rc = com.sun.tools.javac.Main.compile(new String[] {
 125                 "-g", f.getPath() });
 126         if (rc != 0)
 127                 throw new Error("compilation failed. rc=" + rc);
 128             String path = f.getPath();
 129             return new File(path.substring(0, path.length() - 5) + ".class");
 130     }
 131 
 132     static void debugln(String str) {
 133         if(IS_DEBUG)
 134             System.out.println(str);
 135     }
 136 
 137     enum BSMSpecifier {
 138         SPECIFIER1("REF_invokeStatic java/lang/invoke/LambdaMetafactory metaFactory " +
 139                 "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;" +
 140                 "Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)" +
 141                 "Ljava/lang/invoke/CallSite;"),
 142         SPECIFIER2("REF_invokeStatic java/lang/invoke/LambdaMetafactory altMetaFactory " +
 143                         "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;" +
 144                         "[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;");
 145