Better error explanation (line number, byte position)

[kokizzu]

For example, I had a template using this string:

<tr>
            <td>{{=1+it.no}}</td>
            {{? it.rowspan it.rowspan>0 }}<td rowspan="{{=it.rowspan}}"><textarea id="jobdesc_{{=it.no}}">{{=it.jobdesc}}</textarea></td>{{?}}
            <td><input id="aktivitas_{{=it.no}}" value="{{=it.aktivitas}}"/></td>
            <td>
                <select id="periode_{{=it.no}}" value="{{=periode[it.koef_periode]}}" onchange="row_recal({{=it.no}})" >
                    <option value="52">mingguan</option>
                    <option value="12">bulanan</option>
                    <option value="1">tahunan</option>
                </select>
            </td>
            <td><input <?=$ro?> id="koef_periode_{{=it.no}}" value="{{=it.koef_periode}}" /></td>
            <td><input type='number' style="width: 40px" id="vol_kali_{{=it.no}}" value="{{=it.vol_kali}}" onchange="recal_row({{=it.no}})" /></td>
            <td><input type='number' style="width: 40px" id="kuantitas_{{=it.no}}" value="{{=it.kuantitas}}" onchange="recal_row({{=it.no}})" /></td>
            <td><input type='number' style="width: 40px" id="waktu_proses_{{=it.no}}" value="{{=it.waktu_proses}}" onchange="recal_row({{=it.no}})" /></td>
            <td><input type='number' style="width: 60px" id="waktu_terpakai_{{=it.no}}" value="{{=it.waktu_terpakai}}" onchange="recal_row({{=it.no}})" /></td>
            <td id='fte_{{=it.no}}'>{{=it.fte}}</td>
            <td>
                {{? it.no == d.length }}
                    <input type="button" onclick="row_del({{=it.no}})" value="+" />
                {{?}}
                {{? it.no < d.length }}
                    <input type="button" onclick="row_del({{=it.no}})" value="-" />
                    <input type="button" onclick="row_move({{=it.no}},-1)" value="^" {{?? it.no==1 }}disabled='disabled'{{??}} />
                    <input type="button" onclick="row_move({{=it.no}},+1)" value="v" {{?? it.no+1==d.length }}disabled='disabled'{{??}} />
                    <input type="button" onclick="row_set({{=it.no}})" value="Set" />
                {{?}}
            </td>
        </tr>

There error would be:

Could not create a template function: var out=' <tr> <td>'+(1+it.no)+'</td><td rowspan="'+(it.rowspan)+'"><textarea id="jobdesc_'+(it.no)+'">'+(it.jobdesc)+'</textarea></td><td><input id="aktivitas_'+(it.no)+'" value="'+(it.aktivitas)+'"></td> <td> <select id="periode_'+(it.no)+'" value="'+(periode[it.koef_periode])+'" onchange="row_recal('+(it.no)+')"> <option value="52">mingguan</option> <option value="12">bulanan</option> <option value="1">tahunan</option> </select> </td> <td><input id="koef_periode_'+(it.no)+'" value="'+(it.koef_periode)+'"></td> <td><input type="number" style="width: 40px" id="vol_kali_'+(it.no)+'" value="'+(it.vol_kali)+'" onchange="recal_row('+(it.no)+')"></td> <td><input type="number" style="width: 40px" id="kuantitas_'+(it.no)+'" value="'+(it.kuantitas)+'" onchange="recal_row('+(it.no)+')"></td> <td><input type="number" style="width: 40px" id="waktu_proses_'+(it.no)+'" value="'+(it.waktu_proses)+'" onchange="recal_row('+(it.no)+')"></td> <td><input type="number" style="width: 60px" id="waktu_terpakai_'+(it.no)+'" value="'+(it.waktu_terpakai)+'" onchange="recal_row('+(it.no)+')"></td> <td id="fte_'+(it.no)+'">'+(it.fte)+'</td> <td> ';if(it.no == d.length){out+=' <input type="button" onclick="row_del('+(it.no)+')" value="+"> ';}out+=' ';if(it.no &lt; d.length){out+=' <input type="button" onclick="row_del('+(it.no)+')" value="-"> <input type="button" onclick="row_move('+(it.no)+',-1)" value="^" ';}else if(="" it.no="=1"){out+='disabled="disabled" ';}else{out+='=""> <input type="button" onclick="row_move('+(it.no)+',+1)" value="v" ';}else if(="" it.no+1="=d.length"){out+='disabled="disabled" ';}else{out+='=""> <input type="button" onclick="row_set('+(it.no)+')" value="Set"> ';}out+=' </td> </tr> ';return out; 

It took time to comprehend which part of the string that gives error '___')