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bug in bison :: yylval corruption.

From: wim delvaux
Subject: bug in bison :: yylval corruption.
Date: Thu, 1 May 2003 05:06:55 +0200
User-agent: KMail/1.5.1 
Situation :

a :     r 
        { $<StructValue>$ = CreateSomeValue();
        }
        b c d
        { ConsumeInitialisedValue( &$<StructValue>2 );
        }

b :
        x1
        | x2
        | { SomeAction; //////// HERE $<StructValue>$ GETS OVERWRITTEN !!!!
          }
          x3
        ;

yylen in the yylval = yyvsp[1-yylen] is 0 causing the comment just above the 
assignment to match.  Strange thing is that the $<>$ value is overwritten 
with garbage ????


W
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