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25 
26 /*
27  * @test
28  * @bug 8024437
29  * @summary Inferring the exception thrown by a lambda: sometimes fails to compile
30  * @library /tools/javac/lib
31  * @build ToolBox
32  * @run main ExceptionInferenceFromClassFileTest
33  */
34 
35 import java.nio.file.Files;
36 import java.nio.file.Paths;
37 
38 public class ExceptionInferenceFromClassFileTest {
39 
40     static final String ABSrc =
41             "class B {\n" +
42             "    public static <E extends Throwable> void t(A<E> a) throws E {\n" +
43             "        a.run();\n" +
44             "    }\n" +
45             "}\n" +
46 
47             "interface A<E extends Throwable> {\n" +
48             "    void run() throws E;\n" +
49             "}";
50 
51     static final String CSrc =
52             "class C {\n" +
53             "    public void d() {\n" +
54             "        B.t(null);\n" +
55             "    }\n" +
56             "}";
57 
main(String[] args)58     public static void main(String[] args) throws Exception {
59         Files.createDirectory(Paths.get("out"));
60 
61         ToolBox.JavaToolArgs compileABParams =
62                 new ToolBox.JavaToolArgs()
63                 .setOptions("-d", "out")
64                 .setSources(ABSrc);
65         ToolBox.javac(compileABParams);
66 
67         ToolBox.JavaToolArgs compileCParams =
68                 new ToolBox.JavaToolArgs()
69                 .setOptions("-d", "out", "-cp", "out")
70                 .setSources(CSrc);
71         ToolBox.javac(compileCParams);
72     }
73 
74 }
75