"
This is a continuation of recent efforts to cover more and more internal
de-serialization paths with `on_internal_error()`. Errors like this
should always be investigated but this can only be done with a core.
This patch covers the error paths of `composite::iterator` with
`on_internal_error()`. As we need this patch to investigate a 4.0
blocker issue (#6121) it only does the minimal amount of changes needed
to allow generating a core for de-serializiation failures of composites.
There are a few FIXMEs left in the code that I plan to address in a
follow-up.
Ref: #6121
"
* 'compound-on-internal-error/v1' of https://github.com/denesb/scylla:
compound_compat: composite::iterator cover error-paths with on_internal_error()
compound_compat: composite_view: add is_valid()
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