Dear Sage developers,

3 years ago a memory leak in lp solvers was fixed in ticket 
 http://trac.sagemath.org/ticket/11917. It seems that the problems are back 
in Sage 6.3.
The code

while True:
    P = MixedIntegerLinearProgram(solver="Coin")

eats several GB within a few seconds!!! The same with solver="Coin", but 
not with solver="glpk".

I badly need to run a code for millions of small ILPs, but which 
nevertheless are sufficiently big such that "glpk" is useless, "Coin" is a 
snail, but gurobi does very well. Is there a quick work around? Doing a 
`del P' doesn't help. 

Best wishes,
Peter

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