[Compressed Storage] Use smaller type of Index & StorageIndex for determining maximum size during resize.
What does this implement/fix?
Eigen::SPQR sets the StorageIndex type always to SuiteSparse_long.
When Eigen::Index is set to a smaller integer type (eg int32_t via -DEIGEN_DEFAULT_DENSE_INDEX_TYPE=int32_t),
then the call to std::min<Index>(NumTraits<StorageIndex>::highest()) will overflow
to a negative value which then results in internal::throw_std_bad_alloc() being called.
The proposed change uses the smaller index type to query highest().
Additional information
Built and ran Eigen unit tests. Additionally, this fix also works in our codebase.
Edited by Andreas Forster