Memory Allocation
One problem that may be hidden by a language's support for VLAs is that of the underlying memory allocation: in environments where there is a clear distinction between a heap and a stack, it may not be clear which, if any, of those will store the VLA.
For example, the GNU C Compiler allocates memory for VLAs on the stack. VLAs, like all objects in C, are limited to SIZE_MAX bytes.
Read more about this topic: Variable-length Array
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