[Developers] (compiler) bug while using AEIDevelopment/TmunuBase

[Luca Baiotti]

Hi,

after compiling a configuration including AEIDevelopment/TmunuBase with

pgf77 6.1-5 64-bit target on x86-64 Linux

or with

pgf77 5.2-2

on two different machines and by running with the attached simple 
parfile (which does not activate the thorn Tmunu), I get a segmentation 
fault in CactusEinstein/ADMConstraints/src/ADMConstraints.F at the line 
which says:

#include "CalcTmunu.inc"

When expanded by the preprocessor, this part of the source file reads:

c                 Include macro for stress energy tensor.
       if (CCTK_IsThornActive("TmunuBase").eq.1) then
       if (stress_energy_2_state .ne. 0) then
         Ttt = Ttt + T2munu_tt(i,j,k)
         Ttx = Ttx + T2munu_tx(i,j,k)
         Tty = Tty + T2munu_ty(i,j,k)
         Ttz = Ttz + T2munu_tz(i,j,k)
         Txx = Txx + T2munu_xx(i,j,k)
         Txy = Txy + T2munu_xy(i,j,k)
         Txz = Txz + T2munu_xz(i,j,k)
         Tyy = Tyy + T2munu_yy(i,j,k)
         Tyz = Tyz + T2munu_yz(i,j,k)
         Tzz = Tzz + T2munu_zz(i,j,k)
       end if
       end if

and so should be harmless. Instead the segmantation fault is caused by 
something in the inner if-statement: if I remove its content, the 
segmantation fault disppears.

I I turn off optimization. the segmentation fault also disappears.

This problem is easily reproduced by running the attached parfile.

Is this a compiler bug or what?


Ciao,

Luca.

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