Bug#848403: diffoscope: FTBFS randomly (Fatal Python error: deallocating None)

[Ximin Luo]

Chris Lamb:
> Ximin Luo wrote:
> 
>> I still haven't managed to reproduce this myself but I'll just note
>> for the record we have seen this on jenkins before
> 
> My guess is that one of the third-party Python extension modules that
> we import does not correctly reference count Py_None. Someone did a
> good writeup here:
> 
>   http://stackoverflow.com/a/15288194
> 
> Now, we just need to narrow down which one… and then fix it.  >.>
> 

For all you people that already have single-CPU KVM VMs set up, can you please try to reduce your test cases that still reproduce the bug?

For example, can you still reproduce it with `debian/rules clean build`? What about `python3 -m pytest`? Then, does it reproduce when you start manually disabling various tests? What about when running only 1 test case?

X

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