Hello , everyone ,  when  I   want    implement   this    statement  a=a+b ,I  know  it  could  be   backward.
But  if   I want  to    implement   this    statement  a[5]=a[5]+b[3] , I  know  this  action  trigger a
inplace        operation    because  of    a is   a   array  ,and   it   can  not  be  backwardin  pytorch 1.2.0  ,  it’s  memeroy  has  been  changed  I   think .
And  this  action   seems  can  be  done   in  pytorch 1.1.0  but  not   in  pytorch  1.2.0 .  But    if  I  want  to    implement  like  that  ,   what  should  I  write ?
Thanks  for you  reply  and    help.
Below  is  my     wrong  log .

RuntimeError: one of the variables needed for gradient computation has been modified by an inplace operation: [torch.cuda.FloatTensor [212, 256, 7, 7]], which is output 0 of IndexPutBackward, is at version 3; expected version 2 instead. Hint: enable anomaly detection to find the operation that failed to compute its gradient, with torch.autograd.set_detect_anomaly(True).