--- Comment #12 from Martin Sebor <msebor at gcc dot> ---
One of the approaches we have been discussing is replacing these invalid calls
with __builtin_trap or __builtin_unreachable, perhaps optionally preceded by
__builtin_warning ("specified size exceeds maximum object size") which would be
issued if the code wasn't eliminated.  Command line options controlling the
choices would be provided.  This would work in some cases but probably not
those where the invalid value ends up constant-propagated after the new
statement has been introduced.  It's something to investigate/prototype for GCC

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