f28 = f27 * 28
	f29 = f28 * 29
	f30 = f29 * 30
	f31 = f30 * 31
	f32 = f31 * 32
	f33 = f32 * 33
	f34 = f33 * 34
	f35 = f34 * 35
	f36 = f35 * 36
	f37 = f36 * 37
	f38 = f37 * 38
	f39 = f38 * 39
	f40 = f39 * 40
	f41 = f40 * 41
	f42 = f41 * 42
	f43 = f42 * 43
	f44 = f43 * 44
	f45 = f44 * 45
	f46 = f45 * 46
	f47 = f46 * 47
	f48 = f47 * 48
	f49 = f48 * 49
	f50 = f49 * 50
	f51 = f50 * 51

		// integer that happens to have the same
		// representation as a pointer.
		name:    "union2",
		c:       `typedef union { unsigned long i; } u39; void f39(u39 *pu) {}`,
		imports: []string{"unsafe"},
		body:    `var b C.char; p := &b; C.f39((*C.u39)(unsafe.Pointer(&p)))`,
		fail:    false,
	},
	{
		// Test preemption while entering a cgo call. Issue #21306.
		name:    "preemptduringcall",

			printnl()
		}
		printnl()
	}
	printnl()
}

// issue 8097: mishandling of x = x during return.

func f39() (x []int) {
	x = []int{1}
	printnl() // ERROR "live at call to printnl: .autotmp_[0-9]+$"
	return x
}

func f39a() (x []int) {
	x = []int{1}
	printnl() // ERROR "live at call to printnl: .autotmp_[0-9]+$"

			printnl()
		}
		printnl()
	}
	printnl()
}

// issue 8097: mishandling of x = x during return.

func f39() (x []int) {
	x = []int{1}
	printnl() // ERROR "live at call to printnl: .autotmp_[0-9]+$"
	return x
}

func f39a() (x []int) {
	x = []int{1}
	printnl() // ERROR "live at call to printnl: .autotmp_[0-9]+$"

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