From 9c8c5aeafa05ca9c7edb0f32e24955a9236a61ed Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Thu, 21 Feb 2019 09:26:10 +0900
Subject: [PATCH] internal/lsp/cache: skip duplicate import of packages

Change-Id: I33e06b53269cef7aa8962dd41ea74ce25e82fc54
Reviewed-on: https://go-review.googlesource.com/c/163257
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
---
 internal/lsp/cache/view.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/lsp/cache/view.go b/internal/lsp/cache/view.go
index 01b533c0..8c719ead 100644
--- a/internal/lsp/cache/view.go
+++ b/internal/lsp/cache/view.go
@@ -197,6 +197,9 @@ type entry struct {
 }
 
 func (imp *importer) addImports(path string, pkg *packages.Package) error {
+	if _, ok := imp.packages[path]; ok {
+		return nil
+	}
 	imp.packages[path] = pkg
 	for importPath, importPkg := range pkg.Imports {
 		if err := imp.addImports(importPath, importPkg); err != nil {