fixup! Sch: Fix incorrect task signature calculation

Author: jpsamaroo

Diff for: src/sch/util.jl

@@ -292,6 +292,10 @@ function signature(f, args)
     sig_kwarg_names = Symbol[]
     sig_kwarg_types = []
     for (pos, arg) in args
+        if arg isa Dagger.DTask
+            # Only occurs via manual usage of signature
+            arg = fetch(arg; raw=true)
+        end
         T = chunktype(arg)
         if pos === nothing
             push!(sig, T)

Diff for: test/scheduler.jl

@@ -360,7 +360,7 @@ end
         c = Dagger.tochunk(1.0)
         @test Dagger.Sch.signature(*, [nothing=>c, nothing=>3]) == [typeof(*), Float64, Int]
         t = Dagger.@spawn 1+2
-        @test Dagger.Sch.signature(/, [nothing=>t, nothing=>c, nothing=>3]) == [typeof(+), Int, Float64]
+        @test Dagger.Sch.signature(/, [nothing=>t, nothing=>c, nothing=>3]) == [typeof(/), Int, Float64, Int]
     end
 
     @testset "Cost Estimation" begin