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db.somecollection.drop();
assert(db.system.namespaces.find({name:/somecollection/}).length() == 0, 1);
db.somecollection.save({a:1});
assert(db.system.namespaces.find({name:/somecollection/}).length() == 2, 2);
db.somecollection.ensureIndex({a:1});
var z = db.system.namespaces.find({name:/somecollection/}).length();
assert( z >= 1 , 3 );
if( z == 1 )
print("warning: z==1, should only happen with alternate storage engines");
db.somecollection.drop();
assert(db.system.namespaces.find({name:/somecollection/}).length() == 0, 4);
db.somecollection.save({a:1});
assert(db.system.namespaces.find({name:/somecollection/}).length() == 2, 5);
db.somecollection.ensureIndex({a:1});
var x = db.system.namespaces.find({name:/somecollection/}).length();
assert( x == 2 || x == z, 6);
assert(db.somecollection.validate().valid, 7);
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