Spec file parsing errors in comments
This specification file does not compile:
....
optimisation
fuse-algorithmic-steps = on
fuse-algorithmic-steps-factor = 0.99
end optimisation
/*
Q0 = das skalare Feld "dens", die relativistische ruhemasse,
(Q1,Q2,Q3) = den relativistischen Geschwindigkeitsvektor (Impuls),
Q4 = das skalare Feld der inneren Energie (Hydrodynamik),
(Q5,Q6,Q7) = das Magnetfeld (Vektorfeld, für SRHD=0).
Q8 = Die Divergenz des Magnetfelds, die verschwinden muss und ein Mass fuer die numerische Exaktheit ist
*/
solver ADER-DG MHDSolver
variables = 9
parameters = 0
order = 3
...This is due to the comment. Comments in the specification file are not working like comments but they are parsed. The comment was actually added by Tobias himself in https://gitlab.lrz.de/gi26det/ExaHyPE/commit/3f7028f1989ce5367d92336a09bb25fc640eca43 and when doing this, the toolkit fails with the unhelpful message IOException: "Pushback buffer overflow", without mentioning any line number or so.
This is a real drawback of the proprietary configuration file format, as already mentioned by Fabian in https://gitlab.lrz.de/gi26det/ExaHyPE/issues/56#note_16127. If we had instead a simple configuration format as INI, JSON, YAML or so, such errors would not occur and instead, we could have fail proof comments like /* comment */, // comment or # comment.