crash with parameter less function

[Pangoraw]

julia> f = Reactant.compile(()) do
           a = ones(Float64, 2, 2)
           b = Reactant.promote_to(Reactant.TracedRArray{Float64,2}, a)
           return b
       end;
       f()

[431649] signal 11 (1): Segmentation fault
in expression starting at REPL[2]:1
llvm_type_rewrite at /cache/build/builder-demeter6-6/julialang/julia-master/src/ccall.cpp:402
emit_llvmcall at /cache/build/builder-demeter6-6/julialang/julia-master/src/ccall.cpp:846
emit_intrinsic at /cache/build/builder-demeter6-6/julialang/julia-master/src/intrinsics.cpp:1265
emit_call at /cache/build/builder-demeter6-6/julialang/julia-master/src/codegen.cpp:5201
emit_expr at /cache/build/builder-demeter6-6/julialang/julia-master/src/codegen.cpp:6199
emit_ssaval_assign at /cache/build/builder-demeter6-6/julialang/julia-master/src/codegen.cpp:5745
emit_stmtpos at /cache/build/builder-demeter6-6/julialang/julia-master/src/codegen.cpp:6023 [inlined]
emit_function at /cache/build/builder-demeter6-6/julialang/julia-master/src/codegen.cpp:9207
jl_emit_code at /cache/build/builder-demeter6-6/julialang/julia-master/src/codegen.cpp:9541