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f9d857a81b
$he stack reallocation is done in two steps (allocation + free) because the correction of the pointers pointing into the stack must be done while both addresses (the old stack and the new one) are valid. In ISO C, any pointer use after the pointer has been deallocated is undefined behavior. The compiler option '-fsanitize=pointer-subtract' (plus what it needs to work) complained about the old implementation.
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