"Object reference not set to instance of object" error when creating a new text input

Describe the bug

“Object reference not set to instance of object” error shown in chat window in bot framework emulator when a input is added to a bot - text inputs on sample bots work without this error

Version

a7d013b

Browser

I’m using “BotFramework-Composer-0.0.1-windows-setup.exe” windows desktop app

• Chrome
• Safari
• Firefox
• Edge

OS

• macOS
• Windows
• Ubuntu

To Reproduce

Steps to reproduce the behavior:

1. Create a new echo bot
2. Create a text input
3. Set bot asks to “What is your name”?
4. Set property to “dialog.name”
5. Run the bot locally using the emulator
6. The bot will work as expected but following the user entering a response to “what is your name”? it will return “object reference not set to instance of object”

The issue also occurs for other input types - tested on date and multiple choice

This issue can also be replicated by creating a sample bot “AskingQuestionsSample” and adding a new text input. The questions that already exist in the bot created from the template will work as expected - but adding a new text input will trigger the error to happen.

Expected behavior

The expected behaviour is that the error will not occur

Screenshots

Additional context

[luhan2017]

@timoconnellaus , thanks for reporting this issue, this is a bug. In the conversation update trigger we had a Foreach loop on turn.Activity.membersAdded. adding TextInput or whatever action that introduces another turn will refresh the turn memory and break this loop. To work around this bug, you can update the logic in two ways:

1. After another turn is introduced, add a BreakLoop step, which will break this foreach loop and you will not get such error.
2. save turn.Activity.membersAdded into another property which will not auto expire in another turn. and use that property for the loop.

I will update this thread when the bug is resolved. Thank you!!!

[mrivera-ms]

Closed as No Fix.