fix Issue 22970 - importC: taking address one past array end gives bo…

[WalterBright]

…unds error

[dlang-bot]

Thanks for your pull request, @WalterBright!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	22970	normal	importC: taking address one past array end gives bounds error

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + dmd#13945"

[RazvanN7]

I don't understand why address +1 past the end of the buffer is ok, but 2 isn't.

[dkorpel]

That's how C is defined. https://stackoverflow.com/questions/988158/take-the-address-of-a-one-past-the-end-array-element-via-subscript-legal-by-the

[WalterBright]

Because:

int x[4];
for (p = &x[0]; p < &x[4]; ++p)

is a common pattern. x[4] is never dereferenced.

[WalterBright]

The buildkite failure is some networking failure.