test non-0 crash

backend/app/main_test.go

@@ -5,6 +5,7 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"os/exec"
 	"strings"
 	"sync"
 	"syscall"
@@ -56,3 +57,19 @@ func TestGetDump(t *testing.T) {
 	assert.True(t, strings.Contains(dump, "backend/app/main.go"))
 	log.Print("\n dump:" + dump)
 }
+
+func TestCrasher(t *testing.T) {
+	if os.Getenv("BE_CRASHER") == "1" {
+		main()
+		return
+	}
+	cmd := exec.Command(os.Args[0], "-test.run=TestCrasher")
+	cmd.Env = append(os.Environ(), "BE_CRASHER=1")
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stdout
+	err := cmd.Run()
+	if e, ok := err.(*exec.ExitError); ok && !e.Success() {
+		return
+	}
+	t.Fatalf("process ran with err %v, want exit status 1", err)
+}