Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ukma!tut.cis.ohio-state.edu!rutgers!rochester!quiroz
From: quiroz@cs.rochester.edu (Cesar Quiroz)
Newsgroups: gnu.utils.bug
Subject: GAWK--possible parser bug
Summary: $2-1900 != $2 - 1900
Message-ID: <1989Apr14.132352.27070@cs.rochester.edu>
Date: 14 Apr 89 17:23:52 GMT
Reply-To: quiroz@cs.rochester.edu (Cesar Quiroz)
Distribution: na
Organization: U of Rochester, Dept. of Computer Science, Rochester, NY 14627
Lines: 26

This affects 2.10 (and also 2.02) compiled for a Sun 3 running SunOS
3.4.  Gawk was compiled by gcc 1.34.  Credit for finding this bug goes
to Ken Yap. 

    $ gawk '
    > { x = $2-1900; print x; print $2 - 1900; }
    > '
*   0 1989 0
    -1900
    89
    $ /bin/awk '
    > { x = $2-1900; print x; print $2 - 1900; }
    > '
*   0 1989 0
    89
    89

(lines with a * are input to gawk, the other two are the print outputs)

Things work if the bogus subtraction is written ($2)-1900.  All of
this evidence points to some bogus parse.
-- 
                                      Cesar Augusto Quiroz Gonzalez
                                      Department of Computer Science
                                      University of Rochester
                                      Rochester,  NY 14627