Big Decimal exception calling setScale()

Big Decimal exception at completing Physical Inventory for products with cost=0

I reproduced it once with the following:
Create a Physical Inventory entry.
Create a line with a product which has costs=0.
Complete the Physical Inventory.

==> Error: Exception
java.lang.ArithmeticException: Rounding necessary (0): java.math.BigDecimal.divideAndRound(BigDecimal.java:1435)

The cause:
MCost.calculateAverageInv()
Statement newAmt = newAmt.setScale(as.getCostingPrecision());
(line 867)

The fix:
setScale() should be called with a second argument, specifying the required precision:
newAmt = newAmt.setScale(as.getCostingPrecision(),RoundingMode.HALF_UP);

This bug can actually happen always when evaluating costs for products with costs=0
I tried to reproduce it on testadempiere, but it doesn't seem to come to MCost.calculateAverageInv() .

Anyway, it is safer to call setScale() with a rounding mode.

Mario Calderon