</li>
</ul>

<p>
The <code>protect</code> function in the example below invokes
the function argument <code>g</code> and protects callers from
run-time panics raised by <code>g</code>.
</p>

<pre>
func protect(g func()) {
	defer func() {
		log.Println("done")  // Println executes normally even if there is a panic
		if x := recover(); x != nil {

America/Nuuk America/Ojinaga America/Panama America/Pangnirtung America/Paramaribo America/Phoenix America/Port-au-Prince America/Port_of_Spain America/Porto_Acre America/Porto_Velho America/Puerto_Rico America/Punta_Arenas America/Rainy_River America/Rankin_Inlet America/Recife America/Regina America/Resolute America/Rio_Branco America/Rosario America/Santa_Isabel America/Santarem America/Santiago America/Santo_Domingo America/Sao_Paulo America/Scoresbysund America/Shiprock America/Sitka America/St_Barthelemy...

		if r.Name.Kind != "type" {
			error_(r.Pos(), "expression C.%s used as type", fixGo(r.Name.Go))
		} else if r.Name.Type == nil {
			// Use of C.enum_x, C.struct_x or C.union_x without C definition.
			// GCC won't raise an error when using pointers to such unknown types.
			error_(r.Pos(), "type C.%s: undefined C type '%s'", fixGo(r.Name.Go), r.Name.C)
		}
	default:
		if r.Name.Kind == "func" {

pkg math, const SqrtPhi ideal-float
pkg math, const SqrtPi ideal-float
pkg math, func Abs(float64) float64
pkg math, func Acos(float64) float64
pkg math, func Acosh(float64) float64
pkg math, func Asin(float64) float64
pkg math, func Asinh(float64) float64
pkg math, func Atan(float64) float64
pkg math, func Atan2(float64, float64) float64
pkg math, func Atanh(float64) float64
pkg math, func Cbrt(float64) float64

causes a <a href="#Run_time_panics">run-time panic</a>.
</p>

<p>
The <code>protect</code> function in the example below invokes
the function argument <code>g</code> and protects callers from
run-time panics raised by <code>g</code>.
</p>

<pre>
func protect(g func()) {
	defer func() {
		log.Println("done")  // Println executes normally even if there is a panic
		if x := recover(); x != nil {

DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

list](https://groups.google.com/forum/#!forum/golang-nuts) or [other forums](https://golang.org/help/) first. If
the behavior you are seeing is confirmed as a bug or issue, it can easily be re-raised in the issue tracker.

## Filing issues

Sensitive security-related issues should be reported to [******@****.***](mailto:******@****.***).
See the [security policy](https://golang.org/security) for details.

func GcdInt(d, x, y, a, b *Int) {
	d.doinit()
	x.doinit()
	y.doinit()
	a.doinit()
	b.doinit()
	C.mpz_gcdext(&d.i[0], &x.i[0], &y.i[0], &a.i[0], &b.i[0])
}

// ProbablyPrime performs n Miller-Rabin tests to check whether z is prime.
// If it returns true, z is prime with probability 1 - 1/4^n.
// If it returns false, z is not prime.
func (z *Int) ProbablyPrime(n int) bool {
	z.doinit()