buffer initializer_list before reallocation in array::insert

[Ramya-9353]

Repro: a.insert(a.begin(), {a[0], a[1]}) on an array with size() == capacity() reports an ASAN heap-use-after-free; the equivalent self-referential init-list is well defined for std::vector.
Cause: the initializer_list<value_ref> overload builds revert_insert first, which on the growth path frees the old table before write_array dereferences the value_refs that point into it.
Fix: materialise the init-list into a temporary before reserving (as the input-iterator overload already does), then relocate.

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2026-07-17 16:53:49 UTC

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