From 00b279c66ba4b607912088886c759e121b49b7e4 Mon Sep 17 00:00:00 2001
From: Manu Mtz-Almeida <manu.valladolid@gmail.com>
Date: Fri, 12 Jun 2015 18:09:44 +0200
Subject: [PATCH] Adds SetHTMLTemplate() warning

---
 gin.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gin.go b/gin.go
index eb6e8fc..8130b88 100644
--- a/gin.go
+++ b/gin.go
@@ -116,6 +116,14 @@ func (engine *Engine) LoadHTMLFiles(files ...string) {
 }
 
 func (engine *Engine) SetHTMLTemplate(templ *template.Template) {
+	if len(engine.trees) > 0 {
+		debugPrint(`[WARNING] Since SetHTMLTemplate() is NOT thread-safe. It should only be called
+at initialization. ie. before any route is registered or the router is listening in a socket:
+
+	router := gin.Default()
+	router.SetHTMLTemplate(template) // << good place
+`)
+	}
 	engine.HTMLRender = render.HTMLProduction{Template: templ}
 }