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No memory layout guarantee with zig structs #205

@krichprollsch

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@krichprollsch
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Once a zig struct exceeds a given size, it reorders the field's structs.
In this case, casting at the proto level fails and calls become invalid.

The issue happens with XMLHttpRequest: https://lightpanda.slack.com/archives/C05TRU6RBM1/p1707819010681019

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          No memory layout guarantee with zig structs · Issue #205 · lightpanda-io/zig-js-runtime