p.cindex++
		if list := c.List; len(list) > 0 {
			p.comment = c
			p.commentOffset = p.posFor(list[0].Pos()).Offset
			p.commentNewline = p.commentsHaveNewline(list)
			return
		}
		// we should not reach here (correct ASTs don't have empty
		// ast.CommentGroup nodes), but be conservative and try again
	}
	// no more comments
	p.commentOffset = infinity
}