Fix an apparent mistake in GraphBuilder.add_child

oleksandr-pavlyk · oleksandr-pavlyk · commit bb1c0f91cc3b · 2025-08-21T09:40:11.000-05:00
While working on C++ stand-alone code executing what `test_graph.py` does in gh-843, I noticed that `add_child` passes dependendencies extracted from capturing stream inconsistently with num_dependencies parameter obtained in the same cuStreamGetCaptureInfo call. Incidentally, after correcting this error, I can no longer reproduce errors reported in gh-843
diff --git a/cuda_core/cuda/core/experimental/_graph.py b/cuda_core/cuda/core/experimental/_graph.py
@@ -687,7 +687,7 @@ def add_child(self, child_graph: GraphBuilder):
             [
                 handle_return(
                     driver.cuGraphAddChildGraphNode(
-                        graph_out, deps_info_out[0], num_dependencies_out, child_graph._mnff.graph
+                        graph_out, *deps_info_out, num_dependencies_out, child_graph._mnff.graph
                     )
                 )
             ]

Original file line number	Diff line number	Diff line change
`@@ -687,7 +687,7 @@ def add_child(self, child_graph: GraphBuilder):`
`687`	`687`	`[`
`688`	`688`	`handle_return(`
`689`	`689`	`driver.cuGraphAddChildGraphNode(`
`690`		`- graph_out, deps_info_out[0], num_dependencies_out, child_graph._mnff.graph`
	`690`	`+ graph_out, *deps_info_out, num_dependencies_out, child_graph._mnff.graph`
`691`	`691`	`)`
`692`	`692`	`)`
`693`	`693`	`]`