closing a condition block on the last line of file fails when followed by a blank line

Part of my dotnet project template has a yml file for which i have had to add my own SpecialCustomOperations configuration so comments can be detected

template.json:

  "SpecialCustomOperations": {
    "*.yml" : {
      "Operations": [
        {
          "type": "conditional",
          "configuration": {
            "style": "line",
            "token": "#"
          }
        }
      ]
    }
  }

I have found that when an #endif statement is on the last line of the file followed by a blank line (as posix requires) the dotnet new operation fails to initialise the template completely. However if the file has no blank lines or more than one blank line the template is processed correctly.

my-config-file.yml:

thing:
  - thing1
  - thing2
##if( condition )
  -- thing3
##endif

The error i get is

Template "DemoProject" could not be created.
Error while processing file /my-config-file.yml
Non-negative number required.
Parameter name: srcOffset

[AR-May]

Fixed!

[genalt]

@RehanSaeed I will try to do my best to include this fix into .NET 5 release (5.0.100 mid of November). Also, feel free to join our Gitter channel, where you can ask questions like this (https://gitter.im/dotnet/templating).