Segemation fault when quantifying over polymorphic function

[dewert99]

Thank you for working on adding support for polymorphism

Running the following smt2 file

(declare-type-var T)
(declare-fun f (T) bool)
(assert (forall ((x Int)) (f x)))
(check-sat)

causes a segmentation fault

This is with Z3 version 4.12.4 - 64 bit