// environment variable values (currently we only force GOTRACEBACK=none)
	//
	// Other packages may also disable specific functionality when secure mode
	// is enabled (determined by using linkname to call isSecureMode).

	secureEnv()
}

func secureEnv() {
	var hasTraceback bool
	for i := 0; i < len(envs); i++ {
		if stringslite.HasPrefix(envs[i], "GOTRACEBACK=") {
			hasTraceback = true
			envs[i] = "GOTRACEBACK=none"

// Copyright 2024 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package runtime_test

// This test of GOTRACEBACK=system has its own file,
// to minimize line-number perturbation.

import (
	"bytes"
	"fmt"
	"internal/testenv"
	"io"
	"os"
	"path/filepath"
	"reflect"
	"runtime"
	"runtime/debug"
	"strconv"
	"strings"

env GO111MODULE=on
env GOTRACEBACK=single

# Go 1.21 work module should leave panicnil with an implicit default.
cp go.mod.21 go.mod
go list -f '{{.Module.GoVersion}} {{.DefaultGODEBUG}}'
! stdout panicnil
stdout randautoseed=0

# Go 1.21 work module should NOT set panicnil=1 in Go 1.20 dependency.
cp go.mod.21 go.mod
go list -f '{{.Module.GoVersion}} {{.DefaultGODEBUG}}' q
! stdout panicnil=1
! stdout randautoseed

		return _NCONT
	}
Throw:
	mp.throwing = throwTypeRuntime
	mp.caughtsig.set(gp)
	startpanic_m()
	print(notestr, "\n")
	print("PC=", hex(c.pc()), "\n")
	print("\n")
	level, _, docrash = gotraceback()
	if level > 0 {
		goroutineheader(gp)
		tracebacktrap(c.pc(), c.sp(), c.lr(), gp)
		tracebackothers(gp)
		print("\n")
		dumpregs(_ureg)
	}
	if docrash {
		crash()
	}
Exit: