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The following works fine on 32 bit, but segfaults reliably on 64 bit: $ octave octave: X11 DISPLAY environment variable not set octave: disabling GUI features GNU Octave, version 4.0.0 Copyright (C) 2015 John W. Eaton and others. This is free software; see the source code for copying conditions. There is ABSOLUTELY NO WARRANTY; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, type 'warranty'. Octave was configured for "x86_64-unknown-cygwin". Additional information about Octave is available at http://www.octave.org. Please contribute if you find this software useful. For more information, visit http://www.octave.org/get-involved.html Read http://www.octave.org/bugs.html to learn how to submit bug reports. For information about changes from previous versions, type 'news'. octave:1> D = 1000*(rand(1000,1000)-0.5); octave:2> [E,F] = eig(D) panic: Segmentation fault -- stopping myself... attempting to save variables to 'octave-workspace'... save to 'octave-workspace' complete Segmentation fault (core dumped)I see the same when I call a mingw-w64 build of openblas 0.2.15 through Julia (which isn't packaged in Cygwin but shares many common dependencies with Octave), so this is mostly to let Marco know about the issue. I'll have to reduce this to the corresponding Lapack call and come up with a standalone C or Fortran test case to report upstream. My processor is a Sandy Bridge i7-2630QM.
-Tony
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