Hello, I have been using the boxcutter Ubuntu 16.04 desktop JSON file to generate images (https://github.com/boxcutter/ubuntu). The boxcutter JSON files work just fine out of the box. However, I noticed that when I went to change the user password ("ssh_password" in ubuntu.json) to something much longer, I started running into ssh handshake errors. As I changed the password length, I noticed that the points at which the image creation process failed would change as well. I started paying attention to the VM itself during installation (through VMWare Workstation), and observed that with the longer password, the boot options string (generated from my boot_commands array) was being truncated. For every character that I increase the password by, an additional character is left off of the boot option string. Once I reduce the password to a certain length (nine characters in my case), there is enough space for all of the boot commands to be entered, and the image is created successfully. I can't find anywhere that indicates that there is a hard cap on the number of characters in the boot options string, nor can I find any packer documentation that indicates an internal length limitation. As a result, I'm not sure what the underlying issue is, and could use some help if anyone has any suggestions.
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