AddPage throw an exception

[SecureExchanges]

Hello,

We don't really know why (we do not investiguated) but with some specific document we are not able to addPage.

The error occur in that method

 PDFPageTree.prototype.ascend = function (visitor) {
      visitor(this);
      var Parent = this.Parent();
      if (Parent)
        Parent.ascend(visitor);
    };

We fixed the issue by adding the validation on the ascend function. The object exist, but the ascend do not.

 PDFPageTree.prototype.ascend = function (visitor) {
      visitor(this);
      var Parent = this.Parent();
      if (Parent&&Parent.ascend)
        Parent.ascend(visitor);
    };

[Hopding]

Hello @cboivin80! Thanks for reporting this. Are you able to share a document that can be used to reproduce the issue?

[SecureExchanges]

Ok there is the file.

I remove all the pages and leave only one.

bugged-document.pdf

[Hopding]

@cboivin80 Release candidate 1.11.2-rc1 is now published. It contains a fix for this issue (see #608). Please let me know if it solves the problem for your private document!

You can install this new version with npm:

npm install pdf-lib@1.11.2-rc1

It's also available on unpkg:

• https://unpkg.com/pdf-lib@1.11.2-rc1/dist/pdf-lib.js
• https://unpkg.com/pdf-lib@1.11.2-rc1/dist/pdf-lib.min.js

As well as jsDelivr:

• https://cdn.jsdelivr.net/npm/pdf-lib@1.11.2-rc1/dist/pdf-lib.js
• https://cdn.jsdelivr.net/npm/pdf-lib@1.11.2-rc1/dist/pdf-lib.min.js

[SecureExchanges]

Yes it's fix. Thank you so much.