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To: Raja R Harinath <harinath@cs.umn.edu>
Cc: Paolo Carlini <pcarlini@unitus.it>, gcc-bugs@gcc.gnu.org, shebs@apple.com,
   gcc@gcc.gnu.org
Subject: Re: GCC-3.2.2 bootstrap FAILURE: 1 reduce/reduce conflict in objc-parse.y
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From: Gabriel Dos Reis <gdr@integrable-solutions.net>
In-Reply-To: <d97kcqs0c5.fsf@bose.cs.umn.edu>
Organization: Integrable Solutions
Date: Tue, 28 Jan 2003 00:23:00 -0000
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Raja R Harinath <harinath@cs.umn.edu> writes:

| Hi,
| 
| Gabriel Dos Reis <gdr@integrable-solutions.net> writes:
| 
| > Paolo Carlini <pcarlini@unitus.it> writes:
| >
| > | Gabriel Dos Reis wrote:
| > | 
| > | >Could anyone bootstrap with Bison 1.875?
| > | >
| > | Just tried for you, Gaby: definitely Bison 1.875 is not ok for Objc!
| >
| > Thanks!
| >
| > I don't know whether this is a bug in objc-parse.y or a bug in Bison
| > 1.875. I'll make a release note unless someone comes with a fix.
| 
| See 
| 
|   objc/9267: bison 1.875 doesn't like reduce/reduce errors with %expect N

Aha, thanks.

| It is a bug in 'objc-parse.y' (a misuse of %expect).  There has
| been a reduce/reduce conflict in that file for quite some time.  The
| comment even says so (c-parse.in):
| 
|   ifobjc
|   %expect 32 /* shift/reduce conflicts, and 1 reduce/reduce conflict.  */
|   end ifobjc

Interestingly, that number is 31 in my local copy of objc-parse.y.
The fix you propose sounds sensible to me.  An Objective-C maintainer
cares to comment before I make that change? 

-- Gaby