_demo/defer

_demo/defer/main.go

@@ -0,0 +1,18 @@
+package main
+
+func main() {
+	var a int = 5
+	defer println(a)
+	defer func() {
+		println(a)
+	}()
+	defer func() {
+		println(recover().(string))
+	}()
+	a = 10
+	panic("error")
+	//Output:
+	// error
+	// 10
+	// 5
+}

compiler/ssa/eh.go

@@ -294,10 +294,11 @@ func (b Builder) callDefer(self *aDefer, typ Type, fn Expr, args []Expr) {
 		b.Call(fn, args...)
 		return
 	}
+	prog := b.Prog
 	ptr := b.Load(self.argsPtr)
-	data := b.Load(Expr{ptr.impl, b.Prog.Pointer(typ)})
+	data := b.Load(Expr{ptr.impl, prog.Pointer(typ)})
 	offset := 1
-	b.Store(self.argsPtr, Expr{b.getField(data, 0).impl, b.Prog.VoidPtr()})
+	b.Store(self.argsPtr, Expr{b.getField(data, 0).impl, prog.VoidPtr()})
 	if fn.kind == vkClosure {
 		fn = b.getField(data, 1)
 		offset++