fixup! fixup! Various alloc reductions and optimizations

Author: jpsamaroo

src/sch/util.jl

@@ -26,6 +26,7 @@ function errormonitor_tracked_set!(name::String, t::Task)
                 return
             end
         end
+        error("Task not found in tracked list")
     end
 end
 const ERRORMONITOR_TRACKED = LockedObject(Pair{String,Task}[])

src/utils/reuse.jl

@@ -545,7 +545,11 @@ function (cache::ReusableTaskCache)(f, name::String)
         Sch.errormonitor_tracked_set!(name, cache.tasks[idx])
         return cache.tasks[idx]
     else
-        t = Task(()->f)
+        t = @task try
+            @invokelatest f()
+        catch err
+            @error "[$r] Error in non-reusable task" exception=(err, catch_backtrace())
+        end
         cache.setup_f(t)
         schedule(t)
         Sch.errormonitor_tracked(name, t)