From 94d674fd4c2f5ff4c7230e2420a0f54438e35db5 Mon Sep 17 00:00:00 2001
From: JerryZhou <jerryzhou628@gmail.com>
Date: Mon, 20 Dec 2021 11:10:01 +0800
Subject: [PATCH] fix(cmd/proto-gen-errors): non nil assertion for error
 (#1700)

---
 cmd/protoc-gen-go-errors/template.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cmd/protoc-gen-go-errors/template.go b/cmd/protoc-gen-go-errors/template.go
index 1aa478810..3b6e0fc32 100644
--- a/cmd/protoc-gen-go-errors/template.go
+++ b/cmd/protoc-gen-go-errors/template.go
@@ -9,6 +9,9 @@ var errorsTemplate = `
 {{ range .Errors }}
 
 func Is{{.CamelValue}}(err error) bool {
+	if err == nil {
+		return false
+	}
 	e := errors.FromError(err)
 	return e.Reason == {{.Name}}_{{.Value}}.String() && e.Code == {{.HTTPCode}} 
 }