i += 1 doesn't produce correct bytecode

[Synix4Life]

When using i+=1, it produces incorrect bytecode, whereas i = i + 1 produces correct bytecode.

Example:

Taking the Kong program:

fun make_i(): float{
    var i: float = 0;
    i += 1;
    return i;
}

This produces the bytecode:

Function: make_i
$184 = LOAD_INT_CONSTANT 0  // i = 0
$183 = STORE_VARIABLE $184 
$185 = LOAD_INT_CONSTANT 1 
RETURN $183                // return i = 0 -> INCORRECT

But if we use i = i + 1; instead, the resulting bytecode is correct:

Function: make_i
$184 = LOAD_INT_CONSTANT 0  // i = 0
$183 = STORE_VARIABLE $184
$185 = LOAD_INT_CONSTANT 1
$186 = ADD $183, $185       // i = i + 1
$183 = STORE_VARIABLE $186
RETURN $183                 // return i = 1 -> CORRECT