}
	x := Foo{Number(`invalid`)}

	if _, err := Marshal(&x); err == nil {
		t.Fatalf("Marshal error: got nil, want non-nil")
	}
}

func TestMarshalErrorAndReuseEncodeState(t *testing.T) {
	// Disable the GC temporarily to prevent encodeState's in Pool being cleaned away during the test.
	percent := debug.SetGCPercent(-1)
	defer debug.SetGCPercent(percent)

	// Trigger an error in Marshal with cyclic data.

	defer func() {
		if t.Failed() {
			t.Logf("Failure of this test may indicate that your system suffers from a known Linux kernel bug fixed on newer kernels. See https://golang.org/issue/49065.")
		}
	}()

	// Disable on affected builders to avoid flakiness, but otherwise keep
	// it enabled to potentially warn users that they are on a broken
	// kernel.
	if testenv.Builder() != "" && (runtime.GOARCH == "386" || runtime.GOARCH == "amd64") {

func isSweepDone() bool {
	return sweep.active.isDone()
}

// Returns only when span s has been swept.
//
//go:nowritebarrier
func (s *mspan) ensureSwept() {
	// Caller must disable preemption.
	// Otherwise when this function returns the span can become unswept again
	// (if GC is triggered on another goroutine).
	gp := getg()
	if gp.m.locks == 0 && gp.m.mallocing == 0 && gp != gp.m.g0 {

	if r1 == 0 {
		err = errnoErr(e1)
	}
	return
}

func SetProcessPriorityBoost(process Handle, disable bool) (err error) {
	var _p0 uint32
	if disable {
		_p0 = 1
	}
	r1, _, e1 := syscall.Syscall(procSetProcessPriorityBoost.Addr(), 2, uintptr(process), uintptr(_p0), 0)
	if r1 == 0 {
		err = errnoErr(e1)
	}
	return
}

		hammerStoreLoadInt64Method, hammerStoreLoadUint64Method,
	}
	n := int(1e6)
	if testing.Short() {
		n = int(1e4)
	}
	const procs = 8
	defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(procs))
	// Disable the GC because hammerStoreLoadPointer invokes
	// write barriers on values that aren't real pointers.
	defer debug.SetGCPercent(debug.SetGCPercent(-1))
	// Ensure any in-progress GC is finished.
	runtime.GC()

 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

	// could make the slow path here several times faster by
	// batching heap frees.

	// Bail early if there's no more reclaim work.
	if h.reclaimIndex.Load() >= 1<<63 {
		return
	}

	// Disable preemption so the GC can't start while we're
	// sweeping, so we can read h.sweepArenas, and so
	// traceGCSweepStart/Done pair on the P.
	mp := acquirem()

	trace := traceAcquire()
	if trace.ok() {

		buf.Flush()
		conn.Close()
	}))

	// Our test server above is sending back bogus data after the
	// response (the "0\r\n\r\n" part), which causes the Transport
	// code to log spam. Disable keep-alives so we never even try
	// to reuse the connection.
	cst.tr.DisableKeepAlives = true

	res, err := cst.c.Get(cst.ts.URL)
	if err != nil {
		t.Fatal(err)
	}

	if res.Body != NoBody {

// There is only one additional file: calling SetCrashOutput again overrides
// any earlier call.
// SetCrashOutput duplicates f's file descriptor, so the caller may safely
// close f as soon as SetCrashOutput returns.
// To disable this additional crash output, call SetCrashOutput(nil).
// If called concurrently with a crash, some in-progress output may be written
// to the old file even after an overriding SetCrashOutput returns.

	_Copy:    {"copy", 2, false, statement},
	_Delete:  {"delete", 2, false, statement},
	_Imag:    {"imag", 1, false, expression},
	_Len:     {"len", 1, false, expression},
	_Make:    {"make", 1, true, expression},
	// To disable max/min, remove the next two lines.
	_Max:     {"max", 1, true, expression},
	_Min:     {"min", 1, true, expression},
	_New:     {"new", 1, false, expression},
	_Panic:   {"panic", 1, false, statement},