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-rw-r--r--README.md1
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diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -36,6 +36,7 @@ To address that issue, Lua strings are represented by an array of bytes in Fenga
- `os.rename`
- `os.tmpname`
- `os.execute`
+- [Weak tables](http://www.lua.org/manual/5.3/manual.html#2.5.2)
## Extensions