if r != 0 {
		return
	}

	// Decommit failed. Usual reason is that we've merged memory from two different
	// VirtualAlloc calls, and Windows will only let each VirtualFree handle pages from
	// a single VirtualAlloc. It is okay to specify a subset of the pages from a single alloc,
	// just not pages from multiple allocs. This is a rare case, arising only when we're