Cpp error message position (#5781)
Cpp error message position (#5781)

* convert error message offset to (row, col)

* delete testing alert
codecombat/codecombat,codecombat/codecombat,javatlacati/codecombat,javatlacati/codecombat,codecombat/codecombat,codecombat/codecombat,javatlacati/codecombat,javatlacati/codecombat,javatlacati/codecombat,codecombat/codecombat