// Legal parse but illegal execution: non-function should have no arguments.
	{"bug7a", "{{3 2}}", "", tVal, false},
	{"bug7b", "{{$x := 1}}{{$x 2}}", "", tVal, false},
	{"bug7c", "{{$x := 1}}{{3 | $x}}", "", tVal, false},
	// Pipelined arg was not being type-checked.
	{"bug8a", "{{3|oneArg}}", "", tVal, false},
	{"bug8b", "{{4|dddArg 3}}", "", tVal, false},
	// A bug was introduced that broke map lookups for lower-case names.

	}
}

// There are no tags here, so S should not appear.
type BugZ struct {
	BugA
	BugC
	BugY // Contains a tagged S field through BugD; should not dominate.
}

func TestDuplicatedFieldDisappears(t *testing.T) {
	v := BugZ{
		BugA{"BugA"},
		BugC{"BugC"},
		BugY{
			BugA{"nested BugA"},
			BugD{"nested BugD"},
		},
	}
	b, err := Marshal(v)
	if err != nil {