Current preconditioner IncompleteLUT sets the initialization flag m_isInitialized only in IncompleteLUT::compute. This makes the solve method assert if analyzePattern and factorize were called separately, e.g. not via compute. DiagonalPreconditioner sets the m_isInitialized flag in factorize, which should be a feasible solution for IncompleteLUT as well.
thank you for the report, fixed:
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