[Q-e-developers] Massive memory leak caused by intel 2017.1

[Lorenzo Paulatto]

Hello,
I'm experiencing a massive memory leak in pw.x when compiled with the very last ifort:
ifort (IFORT) 17.0.1 20161005

I could track the source of  the leak to PW/src/addusdens.f90, and more precisely to the line
  ALLOCATE ( skk(ngm,nab), tbecsum(nij,nab,nspin_mag), aux2(ngm,nij) )

which allocates 3 variable that should be freed further down (line 135) but for some bug (?) 
aren't.

I tried to change the subroutine around, and even to comment almost all of it out, in case 
some of the instructions between ALLOCATE and DEALLOCATE corrupts the stack and 
render the deallocation impossible. The problem persisted. Also compiling the subroutine 
without optimization had no effect.

Can anybody with access to this compiler verify if they have the same problem?

Of course this is an intel problem, not a QE one, but considered that ifort is the most 
popular compiler, and that this bug affects the latest version I'm afraid it would be better to 
fix this issue, one way or another, before releasing QE 6.1, or risk being submerged by 
complaints.

I found this problem to occur with both 2017.0 and 2017.1 versions, but not with version 
14.0.1.

bye

-- 
Dr. Lorenzo Paulatto 
IdR @ IMPMC -- CNRS & Université Paris 6
phone: +33 (0)1 442 79822 / skype: paulatz
www:   http://www-int.impmc.upmc.fr/~paulatto/
mail:  23-24/423 Boîte courrier 115, 4 place Jussieu 75252 Paris Cédex 05
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