bug#74907: 31.0.50; nsm-check-local-subnet-ipv4 test fails on macOS with VPN enabled

[Robert Pluim]

>>>>> On Mon, 16 Dec 2024 02:03:53 +0000, Stefan Kangas 
>>>>> <stefankangas@gmail.com> said:

    Stefan> I see the below test failure when running with a VPN enabled on 
macOS.
    Stefan> It fails predictably every time, but when I disable the VPN, the 
test
    Stefan> passes.

    Stefan> Looking into it, it seems like it's this call that leads to the
    Stefan> backtrace:

    Stefan>     (nsm-should-check "localhost")

    Stefan> However, when edebugging `nsm-should-check` and step through the 
code, I
    Stefan> do not get a backtrace, and it correctly returns t.

    Stefan> Any ideas for how to continue debugging this?

`printf' (or in this case `message') is your friend :-)

I suspect `network-interface-list' is returning unexpected values
because of the VPN, but Iʼd check `network-lookup-address-info' as well

Robert
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