The following test, narrowed down from from jacks 7.5.1-canonical-1,
distinguishes javac 1.3 from javac 1.4. The spec is not clear whether
this program is allowed or not. Whichever is intended, the spec should
be clarified and the compiler brought in line with the spec.

(If there is a choice, I suggest we consider deeming the old behavior
as correct, as there are other test suites and compilers that imitate
that behavior.)

frog:~/workspaces/test/jikes $ cat -n T.java
     1 package p1;
     2 import p1.T;
     3
     4 class T {
     5 public static void main(String[] args) {
     6 }
     7 }
frog:~/workspaces/test/jikes $ /java/re/jdk/1.2.2/archive/solaris/bin/javac T.java
frog:~/workspaces/test/jikes $ /java/re/jdk/1.3.0/archive/solaris/fcs/binaries/solaris/bin/javac T.java
frog:~/workspaces/test/jikes $ /java/re/jdk/1.4/archive/fcs/binaries/solsparc/bin/javac T.java
T.java:2: p1.T is already defined in this compilation unit
import p1.T;
^
1 error
frog:~/workspaces/test/jikes $