pt::malloc_allocator < T, true, true > [SOLVED]

[degski]

On windows/vs2015u3, pt::pector allocated with pt::malloc_allocator < T, true, true > crashes with debug error that size_t _msize_dbg(void* const block, int const block_use) has been passed a nullptr to block.

Passing a nullptr works on linux, as per manual:
malloc_usable_size() returns the number of usable bytes in the block of allocated memory pointed to by ptr. If ptr is NULL, 0 is returned.

MSDN says the below about _msize():
This function validates its parameter. If memblock is a null pointer, _msize invokes an invalid parameter handler, as described in Parameter Validation. If the error is handled, the function sets errno to EINVAL and returns -1.

So the macro in malloc_allocator_compat.h for windows should be changed from:

#define PT_MALLOC_USABLE_SIZE(p) _msize(p)

to:

#define PT_MALLOC_USABLE_SIZE(p) ((p)==nullptr)?0:_msize((p))