[Pw_forum] example09 segfault - ramtns used but not allocated in dynmatrix.f90

[Jean-Roch Huntzinger]

Dear all,

The attached patch solves a segfault in example09 on 
qe 4.3.2 compiled with gfortran 4.5.3 [or equally with 4.5.0 or 4.6.2] :
running normal mode calculation for CH4..../run_example: line 226:  4939
Segmentation fault      (core dumped) $PH_COMMAND < ch4.nm.in > ch4.nm.out

Using gdb shows that lraman was false;
in this case ramtns is never allocated,
hence the evaluation of the expression ramtns*omega/fpi*convfact
failed during the call to write_dyn_mat_header, line 152 of dynmatrix.f90.

The userguide warns about segfaults, 
but here it does not sound like a compiler bug.
Is this correct ? Should I file a bug report ?

Jean-Roch Huntzinger
-- 
L2C/SMC UMR 5221 - Université Montpellier 2, CNRS - France
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