represent distinct run-time error conditions are unspecified.
</p>

<pre>
package runtime

type Error interface {
	error
	// and perhaps other methods
}
</pre>

<h2 id="System_considerations">System considerations</h2>

<h3 id="Package_unsafe">Package <code>unsafe</code></h3>

<p>
The built-in package <code>unsafe</code>, known to the compiler

pkg syscall (linux-386), const PTRACE_SINGLEBLOCK = 33
pkg syscall (linux-386), const PTRACE_SINGLESTEP = 9
pkg syscall (linux-386), const PTRACE_SYSCALL = 24
pkg syscall (linux-386), const PTRACE_SYSEMU = 31
pkg syscall (linux-386), const PTRACE_SYSEMU_SINGLESTEP = 32
pkg syscall (linux-386), const PTRACE_TRACEME = 0
pkg syscall (linux-386), const PathMax = 4096
pkg syscall (linux-386), const RLIMIT_AS = 9

pkg debug/pe, const IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP = 1024
pkg debug/pe, const IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP ideal-int
pkg debug/pe, const IMAGE_FILE_SYSTEM = 4096
pkg debug/pe, const IMAGE_FILE_SYSTEM ideal-int
pkg debug/pe, const IMAGE_FILE_UP_SYSTEM_ONLY = 16384
pkg debug/pe, const IMAGE_FILE_UP_SYSTEM_ONLY ideal-int
pkg debug/pe, const IMAGE_SUBSYSTEM_EFI_APPLICATION = 10
pkg debug/pe, const IMAGE_SUBSYSTEM_EFI_APPLICATION ideal-int

# Usage: buildall.bash [-e] [pattern]
#
# buildall.bash builds the standard library for all Go-supported
# architectures.
#
# Originally the Go build system used it as a smoke test to quickly
# flag portability issues in builders named "misc-compile" or "all-compile".
# As of CL 464955, the build system uses make.bash -compile-only instead,
# so this script no longer runs in any automated fashion.
#
# Options:
#   -e: stop at first failure

# Command Line

Usage:

	go tool asm [flags] file

The specified file must be a Go assembly file.
The same assembler is used for all target operating systems and architectures.
The GOOS and GOARCH environment variables set the desired target.

Flags:

	-D name[=value]
		Predefine symbol name with an optional simple value.
		Can be repeated to define multiple symbols.

func detectUTF8(s string) (valid, require bool) {
	for i := 0; i < len(s); {
		r, size := utf8.DecodeRuneInString(s[i:])
		i += size
		// Officially, ZIP uses CP-437, but many readers use the system's
		// local character encoding. Most encoding are compatible with a large
		// subset of CP-437, which itself is ASCII-like.
		//
		// Forbid 0x7e and 0x5c since EUC-KR and Shift-JIS replace those

		}
	}
	if s.Err() != nil {
		t.Fatal("after scan:", s.Err())
	}
}

// negativeEOFReader returns an invalid -1 at the end, as though it
// were wrapping the read system call.
type negativeEOFReader int

func (r *negativeEOFReader) Read(p []byte) (int, error) {
	if *r > 0 {
		c := int(*r)
		if c > len(p) {
			c = len(p)
		}
		for i := 0; i < c; i++ {

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// This wrapper uses syscall.Flock to prevent concurrent adb commands,
// so for now it only builds on platforms that support that system call.
// TODO(#33974): use a more portable library for file locking.

//go:build darwin || dragonfly || freebsd || illumos || linux || netbsd || openbsd

// This program can be used as go_android_GOARCH_exec by the Go tool.

	MSR	R6, AMEVTYPER02_EL0                              // ERROR "system register is not writable"
	MSR	R6, AMEVTYPER03_EL0                              // ERROR "system register is not writable"
	MSR	R6, AMEVTYPER04_EL0                              // ERROR "system register is not writable"
	MSR	R6, AMEVTYPER05_EL0                              // ERROR "system register is not writable"

The new [Localize] function safely converts a slash-separated