From 03cee0656c9fd8cf9509c3a91baf72db4a8f6d28 Mon Sep 17 00:00:00 2001
From: 徐志强 <652732310@qq.com>
Date: Tue, 18 Feb 2020 16:03:32 +0800
Subject: scope.add should only record the first position

---
 tools/go_generics/globals/scope.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/go_generics/globals/scope.go b/tools/go_generics/globals/scope.go
index 96c965ea2..eec93534b 100644
--- a/tools/go_generics/globals/scope.go
+++ b/tools/go_generics/globals/scope.go
@@ -72,6 +72,10 @@ func (s *scope) deepLookup(n string) *symbol {
 }
 
 func (s *scope) add(name string, kind SymKind, pos token.Pos) {
+	if s.syms[name] != nil {
+		return
+	}
+
 	s.syms[name] = &symbol{
 		kind:  kind,
 		pos:   pos,
-- 
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