From fb6733c21e0b5ec8bd96ccb776096ce3d59fc49a Mon Sep 17 00:00:00 2001
From: =?utf8?q?J=C3=A9r=C3=A9mie=20Astor?= <astor.jeremie@wanadoo.fr>
Date: Mon, 25 May 2020 01:24:16 +0200
Subject: [PATCH] :art: Prevent writing same template

---
 src/parse/scan2.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/parse/scan2.c b/src/parse/scan2.c
index 8b066b69..3bb0c31e 100644
--- a/src/parse/scan2.c
+++ b/src/parse/scan2.c
@@ -373,8 +373,9 @@ ANN2(1, 2) static m_bool scan2_fdef_tmpl(const Env env, const Func_Def f, const
           ++i;
           continue;
         }
-        m_bool ret = compat_func(ff->def, f);
-        if(ret > 0) {
+        if(compat_func(ff->def, f) > 0) {
+          if(ff->value_ref->from->owner == env->curr)
+            ERR_B(f->pos, "template function '%s' already defined with those arguments in this namespace", name)
           const Symbol sym = func_symbol(env, env->curr->name, name,
             "template", ff->vt_index);
           nspc_add_value(env->curr, sym, value);
-- 
2.43.0