but instead calls a Go helper function that wraps the C library malloc
but guarantees never to return nil. If C's malloc indicates out of memory,
the helper function crashes the program, like when Go itself runs out
of memory. Because C.malloc cannot fail, it has no two-result form
that returns errno.

# C references to Go

Go functions can be exported for use by C code in the following way:

	//export MyFunction

	"internal/testenv"
	"os"
	"path/filepath"
	"runtime"
	"strings"
	"sync"
	"testing"
)

// TestMain executes the test binary as the addr2line command if
// GO_ADDR2LINETEST_IS_ADDR2LINE is set, and runs the tests otherwise.
func TestMain(m *testing.M) {
	if os.Getenv("GO_ADDR2LINETEST_IS_ADDR2LINE") != "" {
		main()
		os.Exit(0)
	}

	os.Setenv("GO_ADDR2LINETEST_IS_ADDR2LINE", "1") // Set for subprocesses to inherit.

// If T is a floating-point type and any of the arguments are NaNs,
// max will return NaN.
func max[T cmp.Ordered](x T, y ...T) T

// The min built-in function returns the smallest value of a fixed number of
// arguments of [cmp.Ordered] types. There must be at least one argument.
// If T is a floating-point type and any of the arguments are NaNs,
// min will return NaN.
func min[T cmp.Ordered](x T, y ...T) T

var s []string
_ = min(s...)               // invalid: slice arguments are not permitted
t := max("", "foo", "bar")  // t == "foo" (string kind)
</pre>

<p>
For numeric arguments, assuming all NaNs are equal, <code>min</code> and <code>max</code> are
commutative and associative:
</p>

<pre>
min(x, y)    == min(y, x)
min(x, y, z) == min(min(x, y), z) == min(x, min(y, z))
</pre>

<p>

# 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

if [ ! -f run.bash ]; then
	echo 'buildall.bash must be run from $GOROOT/src' 1>&2
	exit 1
fi

sete=false
if [ "$1" = "-e" ]; then

//
// If the current file is sparse and w is an io.WriteSeeker,
// then writeTo uses Seek to skip past holes defined in Header.SparseHoles,
// assuming that skipped regions are filled with NULs.
// This always writes the last byte to ensure w is the right size.
//
// TODO(dsnet): Re-export this when adding sparse file support.
// See https://golang.org/issue/22735

//
// Since the set of packages that exist depends on context, the result of
// loadImports also depends on context. However, to improve test running time
// the configuration for each environment is cached across runs.
func (w *Walker) loadImports() {
	if w.context == nil {
		return // test-only Walker; does not use the import map
	}

	name := contextName(w.context)

	imports, ok := listCache.Load(name)
	if !ok {

“Incorrect compilation” section below.
</p>

<h2 id="synchronization">Synchronization</h2>

<h3 id="init">Initialization</h3>

<p>
Program initialization runs in a single goroutine,
but that goroutine may create other goroutines,
which run concurrently.
</p>

<p class="rule">
If a package <code>p</code> imports package <code>q</code>, the completion of