From 3ed6acd2d20de0a2a08ddf6549fb06a66687d96a Mon Sep 17 00:00:00 2001
From: emekoi <emekankurumeh@outlook.com>
Date: Tue, 11 Jun 2019 18:40:55 -0500
Subject: [PATCH] fixed infinite loop when caching packages

---
 src/codegen.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/codegen.cpp b/src/codegen.cpp
index a50a416e4..56bc9827c 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -9373,6 +9373,8 @@ static void add_cache_pkg(CodeGen *g, CacheHash *ch, ZigPackage *pkg) {
         // TODO: I think we need a more sophisticated detection of
         // packages we have already seen
         if (entry->value != pkg) {
+            auto root = pkg->package_table.maybe_get(buf_create_from_str("@root"));
+            if (root != nullptr && entry->value == root->value) continue;
             cache_buf(ch, entry->key);
             add_cache_pkg(g, ch, entry->value);
         }