pyrs crash when you cancel a csv export

[fanchercm]

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. Specify which version/branch is used.
2. Describe the steps needed to trigger the error, including a link to necessary testing file if applicable.
3. Describe the errors, and copy-and-paste the error messages is applicable.
4. Mentioning the developer related (by checking Git history) or one of the maintainers directly.

Expected behavior A clear and concise description of what you expected to happen.

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Environment (please complete the following information):

• OS: [e.g. Ubuntu]
• Version [e.g. 22]

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[fanchercm]

[fanchercm]

PR #882