Created attachment 613 [details] Patch to fix the issue From https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=800101 UF_long has been replaced by SuiteSparse_long in recent versions of suitesparse. Tha patch is attached.
Thanks for the report, the patch was incomplete, fixed: https://bitbucket.org/eigen/eigen/commits/6996ab297ded/ (and backported to 3.2)
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