Execution of empty task graph with registered objects causes cryptic assertion error

[andrii0lomakin]

Good day.
I mistakenly created two task graphs and registered objects to transfer in one graph but tasks in the other one.
Then I executed a graph with 0 amount of tasks and registered transfer objects.
As a result, I got a cryptic assertion error (only because assertions were enabled).

That does not allow for identifying such issues correctly.

[stratika]

hi @andrii0lomakin, thanks for the report. To understand better, did you try something similar to this?

TaskGraphgraph = new TaskGraph("s0");
graph.transferToDevice(DataTransferMode.FIRST_EXECUTION, input) 
          .transferToHost(DataTransferMode.EVERY_EXECUTION, output);

ImmutableTaskGraph immutableTaskGraph = graph.snapshot();
TornadoExecutionPlan executionPlan = new TornadoExecutionPlan(immutableTaskGraph);
executionPlan.execute();

How did you enable the assertions? And what is the exact error message you got?

[andrii0lomakin]

@stratika
I have used -ea -da:org.graalvm.compiler...
You can find the reproducer there: https://github.com/babylonml/tornadovm-bugs/blob/main/src/test/kotlin/com/babylonml/EmptyTaskGraph.kt . To run the test, please specify the TornadoVM SDK location using the babylonml.tornadovm.home property.