I'm getting a seg-v (not an assert) at expression.c:6255 from some template code. Is this a know issue or sould I put some work into cutting it down?

Hello BCS,

> I'm getting a seg-v (not an assert) at expression.c:6255 from some
> template code. Is this a know issue or sould I put some work into
> cutting it down?
> 

FWIW this "fixes" the problem into an assert

Expression *DotTemplateInstanceExp::semantic(Scope *sc)
{
#if LOGSEMANTIC
    printf("DotTemplateInstanceExp::semantic('%s')\n", toChars());
#endif
    Expression *eleft;
    Expression *e = new DotIdExp(loc, e1, ti->name);
L1:
    e = e->semantic(sc);
    if (e->op == TOKdottd)
    {
	DotTemplateExp *dte = (DotTemplateExp *)e;
	TemplateDeclaration *td = dte->td;
	eleft = dte->e1;
	ti->tempdecl = td;
	ti->semantic(sc);
+	assert(ti->inst != NULL);
	Dsymbol *s = ti->inst->toAlias();
	Declaration *v = s->isDeclaration();
	if (v)
	{   e = new DotVarExp(loc, eleft, v);
	    e = e->semantic(sc);
	    return e;
	}
	e = new ScopeExp(loc, ti);
	e = new DotExp(loc, eleft, e);
	e = e->semantic(sc);
	return e;
    }
    else if (e->op == TOKimport)
    {   ScopeExp *se = (ScopeExp *)e;
	TemplateDeclaration *td = se->sds->isTemplateDeclaration();