add print test (broken)

Author: nsajko

test/no_invalidations.jl

@@ -59,6 +59,9 @@ end
         end
     end
     @testset "new subtype of `AbstractString`" begin
+        @testset "`print`" begin
+            @test test_expr((n -> :(function Base.print(::IO, ::$n) end)), AbstractString) broken=true
+        end
         @testset "index-related" begin
             fs = (thisind, prevind, nextind)
             broken = (thisind, prevind, nextind)