// future use, that future use will have obviously wrong data.
func writeAndKill(w io.Writer, b []byte) {
	w.Write(b)
	for i := range b {
		b[i] = 'Z'
	}
}

// diffJSON diffs the stream we have against the stream we want
// and fails the test with a useful message if they don't match.
func diffJSON(t *testing.T, have, want []byte) {
	t.Helper()
	type event map[string]any

// crash 20
type Z20 /* ERROR "invalid recursive type" */ interface{ Z20 }
func F20[t Z20]() { F20(t /* ERROR "invalid composite literal type" */ /* ERROR "too many arguments in call to F20\n\thave (unknown type)\n\twant ()" */ {}) }

// crash 21
type Z21 /* ERROR "invalid recursive type" */ interface{ Z21 }
func F21[T Z21]() { ( /* ERROR "not used" */ F21[Z21]) }

// crash 24

	return 2.3 // ERROR "not enough return values\n\thave \(number\)\n\twant \(int, int\)|not enough arguments to return"
}

func foo2() {
	return int(2), 2 // ERROR "too many (arguments to return|return values)\n\thave \(int, number\)\n\twant \(\)|return with value in function with no return type"
}

func foo3(v int) (a, b, c, d int) {
	if v >= 0 {

func f() {
	var x int
	f0(1)              // ERROR "too many arguments in call to f0\n\thave \(number\)\n\twant \(\)"
	f0(x)              // ERROR "too many arguments in call to f0\n\thave \(int\)\n\twant \(\)"
	f1()               // ERROR "not enough arguments in call to f1\n\thave \(\)\n\twant \(int\)"
	f1(1, 2)           // ERROR "too many arguments in call to f1\n\thave \(number, number\)\n\twant \(int\)"

Method <org.gradle.api.plugins.antlr.AntlrTask.getSource()> does not have raw return type assignable to org.gradle.api.file.ConfigurableFileCollection in (AntlrTask.java:0)

//
// misspelled     x.foo   ==    Foo    type X has no field or method foo, but does have field Foo
// misspelled     x.foo   ==    FoO    type X has no field or method foo, but does have field FoO
// ok             x.foo   ==    foo
// misspelled     x.foo   ==    foO    type X has no field or method foo, but does have field foO
//
// ok             x.Foo   !=    Foo

	return 1 // ERROR "not enough (arguments to return|return values)\n\thave \(number\)\n\twant \(int, error\)"
}

func _() (int, error) {
	var x int
	return x // ERROR "not enough (arguments to return|return values)\n\thave \(int\)\n\twant \(int, error\)"
}

func _() int {
	return 1, 2 // ERROR "too many (arguments to return|return values)\n\thave \(number, number\)\n\twant \(int\)"
}

func _() {

methods\ that\ are\ mutable\ public\ API\ properties\ and\ do\ not\ have\ raw\ return\ type\ org.gradle.api.resources.TextResource\ and\ do\ not\ have\ raw\ return\ type\ assignable\ to\ org.gradle.api.file.FileCollection\ should\ have\ return\ type\ Provider=public-api-mutable-properties.txt

Method <org.gradle.api.tasks.SourceSet.getAnnotationProcessorPath()> does not have raw return type assignable to org.gradle.api.file.ConfigurableFileCollection in (SourceSet.java:0)

				t.Fatalf("didn't match filter chains, have names %v, expected %v", xdstest.ExtractFilterChainNames(l), want)
			}
			// Now check they are equivalent
			for i := range lt.FilterChains {
				have := l.FilterChains[i]
				want := lt.FilterChains[i]

				VerifyFilterChain(t, have, want)
			}
		} else {
			for _, want := range lt.FilterChains {
				found := 0
				for _, have := range l.FilterChains {