[Bug-kawa] [bug #39229] Empty string symbol lexer problem

[Matthieu Vachon]

URL:
  <http://savannah.gnu.org/bugs/?39229>

                 Summary: Empty string symbol lexer problem
                 Project: Kawa
            Submitted by: maoueh
            Submitted on: Tue 11 Jun 2013 01:48:14 PM GMT
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

The following piece of code does not compile (exception raised at the lexer
level):

(equal? '|| (string->symbol ""))

This was compiling before. Sure it's not a common use case but we had used it
in the past to directly <String> object (symbol was <String> at that time). 

I changed it in my code base but thought it would be good to solve it. 

Problem comes from the `packageManager == endPos - 1` condition. When symbol
is the empty string, packagerManager is -1 and endPos is 0 (-1 == 0 - 1). 

I will post a fix shortly.

Regards,
Matt




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