compiler segfault (confusion with non public interfaces)

[Olivier LF <olivier at zipworld dot com dot au>]

Hi,

gcj (the compiler) segfault in the following case. This is with 
CVS head from 14/10/2001. I haven't try with the latest.

file a/A.java (package protected interface)
--------------------------------------------------------------------------
package a;

interface A
{
   String HELLO = "hello";
}


file a/B.java (a public class that implements the interface)
--------------------------------------------------------------------------
package a;

public class B
implements A
{
}


file a/b/C.java (a class in a different package that imports both A and B,
and tries to use the constant A.HELLO)
--------------------------------------------------------------------------
package a.b;

import a.A;
import a.B;

public class C
{
   public static void hello()
   {
      System.out.println(A.HELLO);
   }
}
	       


Note that "A" and therefore "A.Hello" are protected in package "a" and should 
not be accessible from class "C". Sun JDK correctly reports:

  tournesol$ javac a/b/C.java 
  a/b/C.java:3: a.A is not public in a; cannot be accessed from outside
  package
  import a.A;
         ^
	 a/b/C.java:10: a.A is not public in a; cannot be accessed from
	 outside package
	       System.out.println(A.HELLO);
	       

but gcj gets confused by the fact that class "B" (also imported) is
public in package "a" and implements "A". It wrongly believes that "A"
is accessible and segfault:

  tournesol$ gcj -C  a/b/C.java
  a/b/C.java: In class `a.b.C':
  a/b/C.java: In method `a.b.C.hello()':
  a/b/C.java:10: Internal error: Segmentation fault
  Please submit a full bug report,

Olivier

-- 
----------------------------------------------------------------------
Olivier Louchart-Fletcher
Email: olivier@zipworld.com.au