Check for a passed-in type argument vector in the prolog of generic functions.

runtime/vm/kernel_to_il.h

Index: runtime/vm/kernel_to_il.h
diff --git a/runtime/vm/kernel_to_il.h b/runtime/vm/kernel_to_il.h
index 959197744ac81bf629441c604af5ff272aac5596..3f30d40ad36b60c2b4442b8c55697d481b895721 100644
--- a/runtime/vm/kernel_to_il.h
+++ b/runtime/vm/kernel_to_il.h
@@ -703,7 +703,9 @@ class FlowGraphBuilder {
                         intptr_t argument_count,
                         const Array& argument_names,
                         intptr_t num_args_checked = 1);
-  Fragment ClosureCall(int argument_count, const Array& argument_names);
+  Fragment ClosureCall(intptr_t type_args_len,
+                       intptr_t argument_count,
+                       const Array& argument_names);
   Fragment ThrowException(TokenPosition position);
   Fragment RethrowException(TokenPosition position, int catch_try_index);
   Fragment LoadClassId();