}

// gccgoToSymbol converts a name to a mangled symbol for gccgo.
func gccgoToSymbol(ppath string) string {
	if gccgoMangler == nil {
		var err error
		cmd := os.Getenv("GCCGO")
		if cmd == "" {
			cmd, err = exec.LookPath("gccgo")
			if err != nil {
				fatalf("unable to locate gccgo: %v", err)
			}
		}
		gccgoMangler, err = pkgpath.ToSymbolFunc(cmd, *objDir)

	// QEMU is not perfect at emulating everything.
	// IN_QEMU environmental variable is set by some of the Go builders.
	// IN_QEMU=1 indicates that the tests are running in QEMU. See issue 9605.
	if os.Getenv("IN_QEMU") == "1" {
		t.Skip("ignore the failure in QEMU; see golang.org/issue/9605")
	}
	t.FailNow()
	return nil
}

var diffCPUTimeImpl func(f func()) (user, system time.Duration)

		// This means, of course, that users need to rm the old log
		// to get fresh data.
		// TODO: all.bash runs compilers in parallel. Need to synchronize logging somehow?
		w, err := os.OpenFile(filepath.Join(os.Getenv("GOROOT"), "src", "rulelog"),
			os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
		if err != nil {
			panic(err)
		}
		ruleFile = w
	}
	_, err := fmt.Fprintln(ruleFile, s)
	if err != nil {

Starting with version 7.4 Gradle will implicitly treat an external value used at configuration time as a configuration cache input.

	}
}

// Setenv calls os.Setenv(key, value) and uses Cleanup to
// restore the environment variable to its original value
// after the test.
//
// Because Setenv affects the whole process, it cannot be used
// in parallel tests or tests with parallel ancestors.
func (c *common) Setenv(key, value string) {
	c.checkFuzzFn("Setenv")
	prevValue, ok := os.LookupEnv(key)

	t.Run("x509keypairleaf=0", func(t *testing.T) {
		t.Setenv("GODEBUG", "x509keypairleaf=0")
		cert, err := X509KeyPair(certPEM, keyPEM)
		if err != nil {
			t.Fatal(err)
		}
		if cert.Leaf != nil {
			t.Fatal("Leaf should not be populated")
		}
	})
	t.Run("x509keypairleaf=1", func(t *testing.T) {
		t.Setenv("GODEBUG", "x509keypairleaf=1")
		cert, err := X509KeyPair(certPEM, keyPEM)

			}
		})
	}
}

func setGotypesalias(t *testing.T, enable bool) {
	if enable {
		t.Setenv("GODEBUG", "gotypesalias=1")
	} else {
		t.Setenv("GODEBUG", "gotypesalias=0")
	}

		return out
	}

	gatewayNames := sets.New("some-gateway")

	t.Run("for virtual service", func(t *testing.T) {
		g := NewWithT(t)
		cg := core.NewConfigGenTest(t, core.TestOptions{})

		t.Setenv("ISTIO_DEFAULT_REQUEST_TIMEOUT", "0ms")

		routes, err := route.BuildHTTPRoutesForVirtualService(node(cg), virtualServicePlain, serviceRegistry, nil, 8080, gatewayNames, route.RouteOptions{})
		xdstest.ValidateRoutes(t, routes)

			t.Errorf("%q: got %s, want substring %q",
				src, gotObjs, wantObjs)
		}
	}
}

// This is a regression test for #66704.
func TestUnaliasTooSoonInCycle(t *testing.T) {
	t.Setenv("GODEBUG", "gotypesalias=1")
	const src = `package a

var x T[B] // this appears to cause Unalias to be called on B while still Invalid

type T[_ any] struct{}
type A T[B]
type B = T[A]
`