App.Markets.bulkSlaveIntro() review requested

While testing the :: RE FSEgyptianRevivalist acquisitionchanges of !8391 (merged), I noticed and can reproduce the following on upstream:

It seems that although $market is defined it is not passed to correctly to :: Bulk Slave Intro which is just a wrapper for App.Markets.bulkSlaveIntro() 1in the following snippet.

[[Enslave the pair|Bulk Slave Intro][$market = {newSlaves: _newSlaves}, $market.newSlaves.forEach((s) => cashX(forceNeg(_contractCost/$market.newSlaves.length), "slaveTransfer", s))]]