T8256 needs vector

testsuite/tests/codeGen/should_run/all.T

@@ -114,5 +114,5 @@ test('T7361', normal, compile_and_run, [''])
 test('T7600', normal, compile_and_run, [''])
 test('T8103', only_ways(['normal']), compile_and_run, [''])
 test('T7953', reqlib('random'), compile_and_run, [''])
-test('T8256',normal, compile_and_run, [''])
+test('T8256', reqlib('vector'), compile_and_run, [''])
 test('T6084',normal, compile_and_run, ['-O2'])