Nim 2.0.6: invalid type: 'typedesc[seq[EventFuncBool]]' for const

[siminis]

This code compiles with nim 2.0.4
    
    
    type MyObj* = ref object of RootObj
    
    type
      MyObjHandler* = proc (myObj: MyObj): bool
    
    type MyObjFilter* = ref object of RootObj
      myObjHandlerBoolSeq = seq[MyObjHandler]
    
    
    Run

but nim 2.0.6 gives me the error `invalid type: 'typedesc[seq[EventFuncBool]]' 
for const`

Scanning the release notes of nim 2.0.6 did not enlighten me. Any ideas?