If they were indeed giving deadly doses of the drug by accident, it’s no wonder they stopped the study cold turkey.
See the discussion here[1] (from the person who wrote the open letter to Lancet on the now-retracted HCQ study).
[1] https://twitter.com/jwato_watson/status/1272734274823663616
But I wasn’t claiming they were doing so. I said “if” intentionally, since I know nothing about it.