Your bug report

#41279: 26.3; Calc: sum(gcd(0,n),n,-1,-1) evaluates to -1

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 41279@debbugs.gnu.org.

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41279: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=41279
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