Merge pull request #710 from visualfc/sigsegv

[wip] runtime: signal SIGSEGV

cl/_testgo/sigsegv/in.go

@@ -0,0 +1,24 @@
+package main
+
+type T struct {
+	s int
+}
+
+func f() *T {
+	return nil
+}
+
+func init() {
+	println("init")
+	defer func() {
+		r := recover()
+		if e, ok := r.(error); ok {
+			println("recover", e.Error())
+		}
+	}()
+	println(f().s)
+}
+
+func main() {
+	println("main")
+}

cl/_testgo/sigsegv/out.ll

@@ -0,0 +1 @@
+;