JLArrays: Disallow conversions to CPU pointers.#549
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Helps flush out uses of unsupported functionality, e.g. a call to `qr(::JLArray)` that would dispatch to `LAPACK.geqrt!` without erroring. `Base.pointer` remains available for callers that explicitly want a pointer; the guard lives on `Base.unsafe_convert`, which is what ccall routes through. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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This helps flush out uses of unsupported functionality.
Noticed in #458, where a call to
qr(::JLArray)dispatched toLAPACK.geqrt!without erroring.