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 038e0e1b0e706f8ce550e003543d814217912dea..2c568ee0703bd4af047244e7a96b60dd36cbd804 100644
--- a/runtime/vm/kernel_to_il.h
+++ b/runtime/vm/kernel_to_il.h
@@ -895,7 +895,9 @@ class FlowGraphBuilder : public ExpressionVisitor, public StatementVisitor {
                         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();