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FYI, Intuit has now acknowledged the bug, see Capital Loss Carryover Worksheet Line 1 Calc. Error 

However, even that article is incorrect - it states that you may be impacted if Line 7 of your 2018 Form 1040 is a negative number 

I am impacted and line 7 on my 2018 Form 1040 is not a negative number.

The article should have stated that you may be impacted if Line 10 of your 2018 Form 1040 would have been a negative number if a negative number could have been entered on that line.