queryAAAA: true,
		},
		{
			name: "udp: large request",
			host: "giant.",
			// Upstream UDP server returns big response, we cannot serve it. Compliant server would truncate it.
			expectResolutionFailure: dns.RcodeServerFailure,
		},
		{
			name:     "tcp: large request",
			host:     "giant.",
			expected: giantResponse,
		},
		{
			name:                    "large request edns",

		// except colon, in a header key. Issue #58862.
		in: `From: iant@golang.org
Custom/Header: v

Body
`,
		header: Header{
			"From":          []string{"iant@golang.org"},
			"Custom/Header": []string{"v"},
		},
		body: "Body\n",
	},
	{
		// RFC 4155 mbox format. We've historically permitted this,
		// so we continue to permit it. Issue #60332.
		in: `From iant@golang.org Mon Jun 19 00:00:00 2023
From: ******@****.***

			// distinction between the inlinable case and the
			// non-inlinable case, but this is hard to do. Example:
			//
			//    type I interface { Tiny() int; Giant() }
			//    type Conc struct { x int }
			//    func (c *Conc) Tiny() int { return 42 }
			//    func (c *Conc) Giant() { <huge amounts of code> }
			//
			//    func passConcToItf(c *Conc) {
			//        makesItfMethodCall(c)
			//    }
			//

	if s != "hi" {
		println("try1 wrong value", s, "hi")
		die()
	}
}

// When a deferred big call starts, it must first
// create yet another stack segment to hold the
// giant frame for x.  Make sure that doesn't
// confuse recover.
func big(mustRecover bool) {
	var x [100000]int
	x[0] = 1
	x[99999] = 1
	_ = x

	v := recover()
	if mustRecover {
		if v == nil {

	if gcphase == _GCmarktermination {
		throw("newUserArenaChunk called with gcphase == _GCmarktermination")
	}

	// Deduct assist credit. Because user arena chunks are modeled as one
	// giant heap object which counts toward heapLive, we're obligated to
	// assist the GC proportionally (and it's worth noting that the arena
	// does represent additional work for the GC, but we also have no idea

		return
	}
	if len(lv.vars) > 10000 || len(lv.f.Blocks) > 10000 {
		// Be careful to avoid doing too much work.
		// Bail if >10000 variables or >10000 blocks.
		// Otherwise, giant functions make this experiment generate too much code.
		return
	}
	if lv.f.Name == "forkAndExecInChild" {
		// forkAndExecInChild calls vfork on some platforms.

		sw.add(swc)
	}
	if len(sw.List) > 0 { // skip if empty
		fn.add(sw)
	}
	fn.add(stmtf("return false"))
	genFile.add(fn)

	// Generate a routine per op. Note that we don't make one giant routine
	// because it is too big for some compilers.
	for _, op := range ops {
		rules := oprules[op]
		_, ok := parseEllipsisRules(oprules[op], arch)
		if ok {
			continue
		}

	//   gcc (Debian 12.2.0-10) 12.2.0
	//   # gcc -g -no-pie -Wl,--compress-debug-sections=zstd line*.c

	zfile1H := &LineFile{Name: "/home/iant/go/src/debug/dwarf/testdata/line1.h"}
	zfile1C := &LineFile{Name: "/home/iant/go/src/debug/dwarf/testdata/line1.c"}
	zfile2C := &LineFile{Name: "/home/iant/go/src/debug/dwarf/testdata/line2.c"}

	// Line table based on readelf --debug-dump=rawline,decodedline
	want := []LineEntry{

		// libopcodes uses the more regular expected encoding).
		// TODO(rsc): Test to ensure Intel manuals are correct and report to libopcodes maintainers?
		// NOTE: iant thinks this is deliberate, but we can't find the history.
		_, reg1 := inst.Args[0].(Reg)
		_, reg2 := inst.Args[1].(Reg)
		if reg1 && reg2 && (inst.Opcode>>24 == 0xDC || inst.Opcode>>24 == 0xDE) {
			switch inst.Op {

				cancel()
				<-c.Done()
			},
			limit:      8,
			gccgoLimit: 25,
		},
	} {
		limit := test.limit
		if runtime.Compiler == "gccgo" {
			// gccgo does not yet do escape analysis.
			// TODO(iant): Remove this when gccgo does do escape analysis.
			limit = test.gccgoLimit
		}
		numRuns := 100
		if testing.Short() {
			numRuns = 10
		}
		if n := testing.AllocsPerRun(numRuns, test.f); n > limit {