From 6bc27c2f165bc9f409165eed8c831c47359acc48 Mon Sep 17 00:00:00 2001
From: Alon Zakai <alonzakai@gmail.com>
Date: Wed, 13 Jan 2016 20:48:04 -0800
Subject: fix binary skipping bug

---
 src/wasm-binary.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/wasm-binary.h')

diff --git a/src/wasm-binary.h b/src/wasm-binary.h
index bf5e185cc..2846a4659 100644
--- a/src/wasm-binary.h
+++ b/src/wasm-binary.h
@@ -470,8 +470,12 @@ public:
       }
       if (function) {
         size_t curr = o.size();
+        o << (uint32_t)0; // placeholder
         visit(function->body);
-        o.writeAt(curr, uint16_t(o.size() - curr));
+        size_t size = o.size() - curr;
+        assert(size <= std::numeric_limits<uint16_t>::max());
+        if (debug) std::cerr << "body size: " << size << ", writing at " << curr << ", next starts at " << o.size() << std::endl;
+        o.writeAt(curr, uint16_t(size));
       }
     }
   }
-- 
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