bugs - JoinAcross Crashes Kernel in Version 11.0

Bug introduced in 11.0.0 and fixed in 11.0.1

The following executes without issue in 10.4.1 and returns immediately. However in 11.0 when the JoinAcross line is executed all available system memory is immediately consumed and after a long while the kernel crashes.

dates = Transpose[{ConstantArray[First@# , Length@Last@#], Last@#, 
         RandomInteger[{20, 100}, Length@Last@#]}] &@
      {#, DateRange[#, {2016, 6}, "Quarter"]} & /@
     DateRange[{1994, 3}, {2016, 6}, "Quarter"] //
   Flatten[#, 1] &;

dsDetail = 
  AssociationThread[{"InitialDate", "AccountingDate", "Value"}, #] & /@

     dates // Dataset;

dsSummary = AssociationThread[{"AccountingDate", "Value"}, #] & /@
    With[{d = DateRange[{1994, 3}, {2016, 6}, "Quarter"]}, 
     Transpose@{d, RandomInteger[{100, 200}, Length@d]}] //
   Dataset;

This next line will run fine in 10.4.1 but will consume all available system memory and crash the kernel in 11.0. The OS is very unresponsive while this is executing in 11.0 so I would advise you have all your Mathematica work saved and closed as a precaution.

JoinAcross[dsDetail, dsSummary, "AccountingDate", 
 KeyCollisionFunction -> ({"Detail" <> #, "Summary" <> #} &)]

It is a bug, correct? Version 11.0 Win 7 Ent SP1

Bug: [CASE:3694291]

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