Add crash handler bypass for testing.

cmd/integration/integration.go

@@ -38,6 +38,7 @@ import (
 
 func main() {
 	runtime.GOMAXPROCS(4)
+	util.ReallyCrash = true
 	util.InitLogs()
 	defer util.FlushLogs()
 

pkg/util/util.go

@@ -25,8 +25,15 @@ import (
 	"github.com/golang/glog"
 )
 
+// For testing, bypass HandleCrash.
+var ReallyCrash bool
+
 // Simply catches a crash and logs an error. Meant to be called via defer.
 func HandleCrash() {
+	if ReallyCrash {
+		return
+	}
+
 	r := recover()
 	if r != nil {
 		callers := ""