# struct X{
#    float a;
# }
#
# void main(){
#    X x;
#    float a;
#
#    a -= x;
# }

Added to DStress as
http://dstress.kuehne.cn/nocompile/o/op*Assign_18_A.d
...
http://dstress.kuehne.cn/nocompile/o/op*Assign_18_P.d

Thomas