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[Octave-bug-tracker] [bug #51198] Computing the inverse of a pathologica
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From: |
Sébastien Villemot |
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Subject: |
[Octave-bug-tracker] [bug #51198] Computing the inverse of a pathological matrix crashes Octave |
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Date: |
Wed, 7 Jun 2017 11:35:38 -0400 (EDT) |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0 |
Follow-up Comment #4, bug #51198 (project octave):
Actually the crash happens when computing the inverse of any complex matrix
containing a NaN. A minimal testcase is:
octave:1> inv([1+i 2; nan 3])
panic: Segmentation fault -- stopping myself...
The problem lies in ComplexMatrix::finverse (MatrixType &, octave_idx_type&,
double&, bool, bool) where, on the second invocation of zgetri, the pivot
vector pipvt is not initialized.
I attach a patch that seems to fix the issue.
(file #40875)
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