DXC allows assigning to members of a const struct variable

[TheRealMJP]

Hello, I just noticed that DXC will compile the following code without any errors:

struct MyData {
   float3 x[4];  
};

StructuredBuffer<MyData> DataIn;
RWStructuredBuffer<MyData> DataOut;

[numthreads(64, 1, 1)]
void CSMain(uint3 dispatchid : SV_DispatchThreadID)
{
    const MyData data = DataIn[dispatchid.x];
    data.x[0] = 1.0f;
    DataOut[dispatchid.x] = data;
}

I would expect the data.x[0] = 1.0f assignment to cause a compiler error since the data variable is marked as const.