GoDestroy dt=3
ProcStop dt=28
EventBatch gen=1 m=18446744073709551615 time=2753926855140 size=56
GoStatus dt=74 g=2 m=18446744073709551615 gstatus=4
GoStatus dt=3 g=3 m=18446744073709551615 gstatus=4
GoStatus dt=1 g=4 m=18446744073709551615 gstatus=4
GoStatus dt=1 g=17 m=18446744073709551615 gstatus=4
EventBatch gen=1 m=18446744073709551615 time=2753926855560 size=1759
Stacks
Stack id=45 nframes=3

	uint64(4102454148908803108), // Uint64N(9223372036854775806)
	uint64(8679174511200971228), // Uint64N(9223372036854775807)
	uint64(2240328155279531676), // Uint64N(18446744073709551614)
	uint64(7311121042813227357), // Uint64N(18446744073709551615)
	uint64(0),                   // Uint64N(1)
	uint64(7),                   // Uint64N(10)
	uint64(2),                   // Uint64N(32)
	uint64(312633),              // Uint64N(1048576)

	"-1e-350",
	"long:-1e-400000",

	// try to overflow exponent
	// [Disabled: too slow and memory-hungry with rationals.]
	// "1e-4294967296",
	// "1e+4294967296",
	// "1e-18446744073709551616",
	// "1e+18446744073709551616",

	// https://www.exploringbinary.com/java-hangs-when-converting-2-2250738585072012e-308/
	"2.2250738585072012e-308",

			reject:  "-2^64-1 overflows int64 and falling back to float64 (as with JSON) loses distinction between float and integer",
		},
		{
			example: hex("c349010000000000000000"),
			reject:  "-18446744073709551617 overflows int64 and falling back to float64 (as with JSON) loses distinction between float and integer",
			fixme:   "decoding negative bigint to interface{} must not produce math/big.Int",
		},
		{

ProcStart dt=1506 p=6 p_seq=10
ProcStop dt=26
ProcStart dt=18634 p=7 p_seq=33
ProcStop dt=34
EventBatch gen=1 m=18446744073709551615 time=7689672466616 size=28
GoStatus dt=61 g=2 m=18446744073709551615 gstatus=4
GoStatus dt=3 g=5 m=18446744073709551615 gstatus=4
EventBatch gen=1 m=18446744073709551615 time=7689672467258 size=4540
Stacks
Stack id=86 nframes=7
	pc=4754167 func=24 file=25 line=736

			"638952175999932299156089414639761565182862536979208272237582" +
			"51185210916864000000000000000000000000", // 100!
	},
	{math.MaxUint64 - 0, math.MaxUint64, "18446744073709551615"},
	{math.MaxUint64 - 1, math.MaxUint64, "340282366920938463408034375210639556610"},
	{math.MaxUint64 - 2, math.MaxUint64, "6277101735386680761794095221682035635525021984684230311930"},

	t.Logf("gdb output:\n%s", got)
	if err != nil {
		t.Fatalf("gdb exited with error: %v", err)
	}

	sgot := strings.ReplaceAll(string(got), "\r\n", "\n")

	if !strings.Contains(sgot, "\n$1 = 42\n$2 = 18446744073709551615\n$3 = -1\n$4 = 1 '\\001'\n$5 = 8192") {
		t.Fatalf("output mismatch")
	}
}

const panicSource = `
package main

import "runtime/debug"

func main() {
	debug.SetTraceback("crash")

	u := &Int{false, nat{0, 0, 1 + 1<<(_W-1), _M ^ (1 << (_W - 1))}}
	v := &Int{false, nat{5, 2 + 1<<(_W-1), 1 << (_W - 1)}}

	r := new(Int)
	q, r := new(Int).QuoRem(u, v, r)
	const expectedQ64 = "18446744073709551613"
	const expectedR64 = "3138550867693340382088035895064302439801311770021610913807"
	const expectedQ32 = "4294967293"
	const expectedR32 = "39614081266355540837921718287"

	// integers
	{"%d", uint(12345), "12345"},
	{"%d", int(-12345), "-12345"},
	{"%d", ^uint8(0), "255"},
	{"%d", ^uint16(0), "65535"},
	{"%d", ^uint32(0), "4294967295"},
	{"%d", ^uint64(0), "18446744073709551615"},
	{"%d", int8(-1 << 7), "-128"},
	{"%d", int16(-1 << 15), "-32768"},
	{"%d", int32(-1 << 31), "-2147483648"},
	{"%d", int64(-1 << 63), "-9223372036854775808"},
	{"%.d", 0, ""},
	{"%.0d", 0, ""},

		ptr:      new(map[int64]string),
		out:      map[int64]string{math.MinInt64: "min", math.MaxInt64: "max"},
	},
	{
		CaseName: Name(""),
		in:       `{"18446744073709551615":"max"}`,
		ptr:      new(map[uint64]string),
		out:      map[uint64]string{math.MaxUint64: "max"},
	},
	{
		CaseName: Name(""),
		in:       `{"0":false,"10":true}`,
		ptr:      new(map[uintptr]bool),