setFromTriplets function gets segfault error

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
cpp
Domain
data

Research direction

Start by reproducing the reported setFromTriplets call with an 80000×80000 sparse matrix, 50% non-zero elements, reserved storage, and the stated dimensions. Inspect the failure around setFromTriplets and determine whether the result is an allocation or input-size problem; done means identifying the cause and documenting or correcting the behavior.

Written by the indexing model from the issue text.

Description

Hello,
I'm using setFromTriplets function to cast a triplet into a sparse matrix which is large. I initialized the sparse matrix with certain dimensions, and reserved the memory for it. But I still get segfault error, saying 'memory not mapped'.

The matrix is 80000*80000 with 50% non-zero elements. Do you have any hint about the reason?

Best,
Yan

Dominant language
C++
Stars
118
Forks
43
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