TypeError: Cannot read property '0' of undefined

[adamreisnz]

I get the following error when using {{#unless @last}}<br>{{/unless}} in an each block inside of a table structure, e.g.

<table class="AddressTable">
    <tr>
      <td>
        <strong>Factuuradres</strong><br>
        {{customer.name}}<br>
        {{#each customer.address.parts as |part|}}
          {{part}}{{#unless @last}}<br>{{/unless}}
        {{/each}}
      </td>
      <td>
        {{#unless order.isPickUp}}
        <strong>Bezorgadres</strong><br>
        {{#if order.delivery.companyName}}
          {{order.delivery.companyName}}<br>
        {{/if}}
        {{order.delivery.name}}<br>
        {{#each order.delivery.address.parts as |part|}}
          {{part}}{{#unless @last}}<br>{{/unless}}
        {{/each}}
        {{/unless}}
      </td>
    </tr>
  </table>

When I move the whole unless block out of the table, it works fine. If I wrap the unless block in an additional <p> tag inside of the '`, it also works. What's happening here?

TypeError: Cannot read property '0' of undefined
    at eval (eval at createFunctionContext (node_modules/handlebars/dist/cjs/handlebars/compiler/javascript-compiler.js:254:23), <anonymous>:6:62)
    at prog (node_modules/handlebars/dist/cjs/handlebars/runtime.js:219:12)
    at execIteration (node_modules/handlebars/dist/cjs/handlebars/helpers/each.js:51:19)
    at Object.<anonymous> (node_modules/handlebars/dist/cjs/handlebars/helpers/each.js:61:13)
    at eval (eval at createFunctionContext (node_modules/handlebars/dist/cjs/handlebars/compiler/javascript-compiler.js:254:23), <anonymous>:10:31)
    at Object.prog [as inverse] (node_modules/handlebars/dist/cjs/handlebars/runtime.js:219:12)
    at Object.<anonymous> (node_modules/handlebars/dist/cjs/handlebars/helpers/if.js:17:22)
    at Object.<anonymous> (node_modules/handlebars/dist/cjs/handlebars/helpers/if.js:24:35)
    at Object.eval (eval at createFunctionContext (node_modules/handlebars/dist/cjs/handlebars/compiler/javascript-compiler.js:254:23), <anonymous>:20:33)
    at main (node_modules/handlebars/dist/cjs/handlebars/runtime.js:173:32)
    at ret (node_modules/handlebars/dist/cjs/handlebars/runtime.js:176:12)
    at ret (node_modules/handlebars/dist/cjs/handlebars/compiler/compiler.js:525:21)

This is with 4.0.5 on Node 6.5.0

[adamreisnz]

It also barks with the same error when I move it all to a <div> structure as follows:

<div class="AddressTable">
    <p>
      <strong>Factuuradres</strong><br>
      {{customer.name}}<br>
      {{#each customer.address.parts as |part|}}
        {{part}}{{#unless @last}}<br>{{/unless}}
      {{/each}}
    </p>
    <p>
      {{#unless order.isPickUp}}
      <strong>Bezorgadres</strong><br>
      {{#if order.delivery.companyName}}
        {{order.delivery.companyName}}<br>
      {{/if}}
      {{order.delivery.name}}<br>
      {{#each order.delivery.address.parts as |part|}}
        {{part}}{{#unless @last}}<br>{{/unless}}
      {{/each}}
      {{/unless}}
    </p>
  </div>

[nikjuice]

I have the same issue in my complex template. And I have found that in most cases this issue occurs when I have the "each" variable (in you case it is "part", named the same in at least 2 each cycles. Just try to change "part" in the second for each to something unique like "part2" or "item".

I can't push a template here, because it very big, but here are some part of stack where problem occurs

+ "\">\n " + container.escapeExpression((helpers.split || (depth0 && depth0.split) || helpers.helperMissing).call(depth0 != null ? depth0 : {},((stack1 = blockParams[0][0]) != null ? stack1.value : stack1),":",0,{"name":"split","hash":{},"data":data,"blockParams":blockParams})) + " (" + container.escapeExpression(container.lambda(((stack1 = blockParams[0][0]) != null ? stack1.count : stack1), depth0)) + ")\n </option>\n";

blockParams is undefined

[adamreisnz]

Interesting, I'll give it a try, thanks.

[nikjuice]

Looks like that #1187 this pull request fix the problem!
I have updated handlebar to the latest version http://builds.handlebarsjs.com.s3.amazonaws.com/handlebars-latest.js and the issue is not reproducible any more

[nknapp]

@adamreisnz @olehyermokhin Since #1187 is part of 4.0.6, this should be fixed. Can you verify that? Would be great if we could close the issue.

[adamreisnz]

Have re-tested with the HTML structure as I had posted above and it seems to work ok now with 4.0.6 🎉

[nknapp]

Great, thank you. Am 31. Dezember 2016 02:23:21 MEZ, schrieb Adam Reis <[email protected]>:

…

Closed #1250. -- You are receiving this because you commented. Reply to this email directly or view it on GitHub: #1250 (comment)

[nikjuice]

I'm sorry for late feedback. I can also confirm that it works with 4.0.6. Thanks a lot!

[jneuendorf]

The latest release is v4.0.5 (20 Nov 16). Why is v4.0.6 behind? If I do the upgrade from v4.0.5 to v4.0.6 are there any missing features or different bugs?

[nknapp]

There actually is a 4.0.6, but it's not available from all source. And there are some issues with it.
Have a look at #1312. It contains a list of bugs that would be fixed with 4.0.7.

I'm currently talking to @wycats in order to get the necessary access rights to perform a release myself. Once I have them (and the necessary time), I want to publish 4.0.7