From 2f184f8e98487bd1120b100b4d8296228403ad75 Mon Sep 17 00:00:00 2001
From: kinggo <lilong.21@bytedance.com>
Date: Sat, 10 Dec 2022 13:56:57 +0800
Subject: [PATCH] optimize: add more detail error message in serverErrorHandler

---
 app.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/app.go b/app.go
index 504a1efc50f..7fca13ac517 100644
--- a/app.go
+++ b/app.go
@@ -1020,6 +1020,7 @@ func (app *App) ErrorHandler(ctx *Ctx, err error) error {
 // errors before calling the application's error handler method.
 func (app *App) serverErrorHandler(fctx *fasthttp.RequestCtx, err error) {
 	c := app.AcquireCtx(fctx)
+	oldErr := err
 	if _, ok := err.(*fasthttp.ErrSmallBuffer); ok {
 		err = ErrRequestHeaderFieldsTooLarge
 	} else if netErr, ok := err.(*net.OpError); ok && netErr.Timeout() {
@@ -1033,6 +1034,7 @@ func (app *App) serverErrorHandler(fctx *fasthttp.RequestCtx, err error) {
 	} else {
 		err = ErrBadRequest
 	}
+	err.(*Error).Message = oldErr.Error()
 
 	if catch := app.ErrorHandler(c, err); catch != nil {
 		_ = c.SendStatus(StatusInternalServerError)