[ET Trac] #2668: GRHydro: work around Intel 19 compiler issue

[Roland Haas]

#2668: GRHydro: work around Intel 19 compiler issue

 Reporter: Roland Haas
   Status: new
Milestone: ET_2022_11
  Version: ET_2021_05
     Type: bug
 Priority: major
Component: EinsteinToolkit thorn

The intel 19 compiler and newer apparently miscompile GRhydro’s HLLE code when MHD is enabled. This results in either a SEGFAULT of con2prim failures. This has been in the ET tests since around 2021 \(it shows up in the ET\_2021\_05\_v0 release tests\).

Pull request   
[https://bitbucket.org/einsteintoolkit/einsteinevolve/pull-requests/18](https://bitbucket.org/einsteintoolkit/einsteinevolve/pull-requests/18)  
provides a workaround. With it the affected tests pass, see eg qb an supermuc on [http://einsteintoolkit.org/testsuite\_results/index.php](http://einsteintoolkit.org/testsuite_results/index.php)

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2668/grhydro-work-around-intel-19-compiler
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