BUG - uninitialized yyval!

[dand-oss]

yyval uninitialized used without init.

[turboencabulator]

Thanks @dand-oss. This is effectively making a default action of { $$ = 0; } for all empty rules, correct?

I checked what bison does for this case, it appears to do { $$ = $0; } instead (by adding the equivalent of else yyval = yyvsp[0];). I have not yet checked what bisonc++ does. So I'm hesitant to add something that makes it differ from other flavors.