From f2fc9b8a7b50cba4b8b2698a06cfbe7ba8018f4f Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Sat, 9 Jul 2016 15:48:25 -0700
Subject: [PATCH] fix duplicate type defined when imported from parseh

---
 src/analyze.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/analyze.cpp b/src/analyze.cpp
index 8e3ce507f..209ee068e 100644
--- a/src/analyze.cpp
+++ b/src/analyze.cpp
@@ -1589,6 +1589,11 @@ static void preview_fn_proto(CodeGen *g, ImportTableEntry *import, AstNode *prot
 static void scan_struct_decl(CodeGen *g, ImportTableEntry *import, BlockContext *context, AstNode *node) {
     assert(node->type == NodeTypeStructDecl);
 
+    if (node->data.struct_decl.type_entry) {
+        // already scanned; we can ignore. This can happen from importing from an .h file.
+        return;
+    }
+
     Buf *name = &node->data.struct_decl.name;
     TypeTableEntry *container_type = get_partial_container_type(g, import, context,
             node->data.struct_decl.kind, node, buf_ptr(name));