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Steps to Reproduce:
1. In the Installation Source spoke, select a valid ISO file
2. Click "Verify"
3. Try to interrupt the verification process by clicking the Cancel button... Oops, there is no Cancel button
4. Hit Ecs a couple of times


Actual results:

anaconda crashes with a traceback


Expected results:

Allow users to interrupt the verification process properly, preferably by providing the Cancel button.

What version of anaconda were you running? Can you attach the traceback to this bug?

Created attachment 807158 [details]
anaconda traceback

I was on 19.31.17-1 but can confirm that the bug occurs on version 21 as well.

Just need to cherry-pick 738e99443f9d5ede940a06cabf6e944da51f5894 to rhel7-branch

This request was resolved in Red Hat Enterprise Linux 7.0.

Contact your manager or support representative in case you have further questions about the request.