[GNC] Bug in GnuCash 5.3 Stock Assistant

[Carsten Hütter]

Hello GnuCash friends!

The stock assistant doesn't seem to work properly in GnuCash 5.3.

When I enter a long buy, the numeric value of the purchase price ("100") 
throws an error ("Transaction can't balance, debit is error value 
GNC_ERROR_ARG"). Instead of the correct number, the purchase price 
appears a second time in the shares column, and the number of shares 
should be empty in the contra account. Everything was fine in 5.1. The 
resulting last window of the stock assist are attached as of version 
5.3.222 (faulty) and 5.1.169 (correct). The example shows the purchase 
of 2.1711 shares of the EL4C.DE ETF with a total value of 100 euros.

My list search didn't show any corresponding entries, so this problem 
doesn't seem to have been noticed until now.

Since I don't have that much experience in bug reporting, it would be 
nice if someone else could do it. Thank you!

Greetings

Carsten
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