[ET Trac] [Einstein Toolkit] #1995: McLachlan constraint tests fail

[Einstein Toolkit]

#1995: McLachlan constraint tests fail
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  Reporter:  hinder                 |       Owner:                                                   
      Type:  defect                 |      Status:  new                                              
  Priority:  critical               |   Milestone:  ET_2017_05                                       
 Component:  EinsteinToolkit thorn  |     Version:  development version                              
Resolution:                         |    Keywords:  McLachlan constraints tests compiler optimization
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Comment (by diener):

 Also compiling this ML_ADMConstraints with -O1 leads to passing the
 otherwise failing testsuites on my laptop with the intel 17 compilers. I
 attempted to run both the -O0 and -O2 executables in gdb in order to try
 to track down where the differences occured. Unfortunately the -O2 version
 is too optimized to get anything sensible out of the debugger. Many
 variables (including the loop indices and local temporary variables) are
 being reported as "optimized away" so it is impossible to even know if I'm
 looking at the same loop iteration as in the -O0 debugging session. At
 this point I have no further ideas about how to proceed in tracking down
 the cause of the problem. I recommend (if possible) to limit the
 optimization level to -O1 for the ML_ADMConstraints_evaluate.cc file for
 the affected compilers, though it will have to be tested if this works in
 all cases.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1995#comment:25>
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