[Octave-bug-tracker] [bug #29553] missing arpack: make check segfaults on eigs

[John W. Eaton]

Follow-up Comment #7, bug #29553 (project octave):

OK, if you set a breakpoint in EIG::init at the point where wi is created,
what is the value printed by

  p wi.rep

?  It looks like this value is invalid at the point of the call to the
Array::make_unique method.  When does it become invalid?  Is it after the
first call to dgeev?  The second?  Somewhere else?

If the call to dgeev is clobbering the value of wi.rep, then we are either
calling dgeev incorrectly, not supplying sufficient workspace, etc., or there
is a bug in your copy of dgeev, or there is some inconsistency in the way your
dgeev is compiled vs the way Octave is calling it (for example, the f2c vs
gfortran calling convention change).

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