Fixes segfault for least squares problems with SPQR

As suggested by @markus.blatt, this MR will replace !487 (closed) by keeping only the changes that solve the bug when solving least squares problems with SPQR. The remaining changes proposed in !487 (closed) will be incorporated in a future MR.

mentioned in merge request !487 (closed)

Thanks. The fix looks good. could you add a brief entry to the CHANGELOG that SPQR now supports non-square matrices? And also add this fact as a bit more detailed explanation to the git log.

added 1 commit

• 56289d81 - Allow SPQR solver to work with non-square matrices

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Do you mind removing the white-space changes in your commit?

added 1 commit

• d5eba453 - Allow SPQR solver to work with non-square matrices

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Thanks!

enabled an automatic merge when the pipeline for d5eba453 succeeds

merged

mentioned in commit 9a72de2d

picked the changes into the branch cherry-pick-9a72de2d with commit d8705234

mentioned in commit d8705234

mentioned in merge request !495 (merged)