Does returned pointer by std.HashMap.getPtr get invalid after inserting values?

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1

I think it gets invalid, encountered some segfaults, well since std.ArrayList didn’t expose any getPtr function thought std.HashMap.getPtr wouldn’t invalid the previous pointer

2

It does. You can use lockPointers to put the hash map in a state where pointer invalidation triggers an assertion. If you want stable pointers, see segmented list.

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