From f8d77fe197273bb09e5d2d24134632b0b15dff42 Mon Sep 17 00:00:00 2001
From: ono-teruya <27873650+teru01@users.noreply.github.com>
Date: Sun, 12 May 2024 16:34:30 +0900
Subject: [PATCH] get the root cause of error and print its stack

---
 errors.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/errors.go b/errors.go
index 2a40666..f948770 100644
--- a/errors.go
+++ b/errors.go
@@ -128,7 +128,10 @@ func (x *Error) Format(s fmt.State, verb rune) {
 	case 'v':
 		if s.Flag('+') {
 			_, _ = io.WriteString(s, x.Error())
-			x.st.Format(s, verb)
+			var c *Error
+			for c = x; c.cause != nil; c = c.cause.(*Error) {
+			}
+			c.st.Format(s, verb)
 			return
 		}
 		fallthrough