No error upon (almost) duplicate function declarations

I cannot reproduce the problem. What I did was add thie follwoing function:

declare function ext:bar3($i as xs:integer)
{
   $i + 2
};

in ext_mod.xq file (in test/unit) and then run the external_function unit test. I did get the expected error of duplicate function declaration.

Can you provide a complete specific test that shows the bug?

// foo.xq

module namespace foo = "http://www.foo.com";

declare function foo:f( $i as xs:integer ) external;

declare function foo:f( $i as xs:integer ) {
  $i + 2
};

// test.xq

import module namespace foo = "http://www.foo.com" at "/tmp/foo.xq";

foo:f(1)

// result
</tmp/foo.xq>:3,9: Zorba error [zerr:ZXQP0008]: "{http://www.foo.com}f#1": function implementation not found; raised at /Users/pjl/src/flwor/zorba/repo/trunk/zorba/src/compiler/translator/translator.cpp:3328

If you reverse the order of the function declarations (put the external one last), the query runs to completion without error and produces the expected result of "3".

In either case, it should instead complain that the same function has been multiply defined.