glop: update

ortools/glop/lp_solver.cc

@@ -177,6 +177,7 @@ ProblemStatus LPSolver::SolveWithTimeLimit(const LinearProgram& lp,
     SOLVER_LOG(&logger_, "Initial problem: ", lp.GetDimensionString());
     SOLVER_LOG(&logger_, "Objective stats: ", lp.GetObjectiveStatsString());
     SOLVER_LOG(&logger_, "Bounds stats: ", lp.GetBoundsStatsString());
+    SOLVER_LOG(&logger_, "Parameters: ", parameters_.ShortDebugString());
   }
 
   // Check some preconditions.

ortools/glop/reduced_costs.cc

@@ -532,6 +532,10 @@ void PrimalPrices::UpdateBeforeBasisPivot(ColIndex entering_col,
   // given by the update_row.
   UpdateEnteringCandidates</*from_clean_state=*/false>(
       update_row->GetNonZeroPositions());
+
+  // This should be redundant with the call above, except in degenerate
+  // cases where the update_row has a zero position on the entering col!
+  prices_.Remove(entering_col);
 }
 
 void PrimalPrices::RecomputePriceAt(ColIndex col) {