SI-2464 Resiliance against missing InnerClass attributes

A classfile in the wild related to Vaadin lacked the InnerClasses
attribute. As such, our class file parser treated a nested enum
class as top-level, which led to a crash when trying to find its
linked module.

More details of the investigation are available in the JIRA comments.

The test introduces a new facility to rewrite classfiles.

This commit turns this situation into a logged warning, rather
than crashing. Code by @paulp, test by yours truly.

1 files changed, 20 insertions, 0 deletions

diff --git a/test/files/run/t2464/Connect.java b/test/files/run/t2464/Connect.java
new file mode 100644
index 0000000000..59349f94c8
--- /dev/null
+++ b/test/files/run/t2464/Connect.java
@@ -0,0 +1,20 @@
+package test;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface Connect {
+
+    LoadStyle loadStyle() default LoadStyle.EAGER;
+
+    public enum LoadStyle {
+        EAGER,
+        DEFERRED,
+        LAZY
+    }
+}