Program crashes if I press return too fast

[allgreed]

Given a clear shell When I start the program and press return 2+ times before the modal is present on the screen Then the program crashes.

As you can see I cannot always reproduce it:

[simonmichael]

Sounds like simonmichael/hledger#743

[hpdeifel]

I remember seeing this some time ago. I think I didn't manage to get a minimal reproducer, but will try again

[hpdeifel]

Ftr, I can still reproduce this with the newest brick versions. Specifically I get: free(): double free detected in tcache 2.

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Inspired by the linked issue above: Here is a good way to reproduce:

while true; do hledger-iadd || break; done

Then hold the Esc key until it breaks.