gimp-2.10.22/app/core/gimpimage-convert-indexed.c:2008: possible cut'n'paste error ?
gimp-2.10.22/app/core/gimpimage-convert-indexed.c:2008:16: style: Variable 'b2->Rmin' is reassigned a value before the old one has been used. [redundantAssignment]
Source code is
b1->Rmax = lb;
b2->Rmin = lb + 1;
Maybe better code:
b1->Rmax = lb;
b1->Rmin = lb + 1;