Weird memory access Error

[parsarahimi]

When you run the function ToMatrix twice, it gives memory access error, makes no sense.
I simplified the bug as much as possible, to reproduce it just use the following.
https://wasdk.github.io/WasmFiddle/

###############C++14###############
#include <math.h> 

void ToMatrix(double** M,double* V,int length)
{
  for (int i = 0; i < length; i++)
	{
		for (int j = 0; j < length; j++)
		{
			M[i][j] = V[i * length + j];
		}
	}
}

void myfunc(double* AT, int length)
{
	double** Matrix = new double* [length];
	for (int i = 0; i < length; i++)
	{
		Matrix[i] = new double[length];
  }
  
  ToMatrix(Matrix,AT,length);
	////Error comes when you do it twice
	ToMatrix(Matrix,AT,length);
	///
}
###############Javascript###############
var wasmModule = new WebAssembly.Module(wasmCode);
wasmInstance = new WebAssembly.Instance(wasmModule, wasmImports);

matrix1 = [[12,-51,4],[6,167,-68],[-4,24,-41]]
InputArray = new Float64Array(wasmInstance.exports.memory.buffer,0,9)
for (var i = 0; i < 3; i++) 
	{
	  for (var j = 0; j < 3; j++) 
	{
	  InputArray[3*i+j] = matrix1[i][j]
	}
}
log(InputArray)
wasmInstance.exports._Z6myfuncPdi(0,3);