From 70e114c38ce6c8dddf9b7ebace09398133c7ada5 Mon Sep 17 00:00:00 2001
From: Ashley Mannix <kodraus@hey.com>
Date: Sun, 19 Jul 2020 11:10:00 +1000
Subject: [PATCH] add a note about getopts constraints

---
 README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README.md b/README.md
index 065a0563..34ebe565 100644
--- a/README.md
+++ b/README.md
@@ -13,3 +13,7 @@ Add this to your `Cargo.toml`:
 [dependencies]
 getopts = "0.2"
 ```
+
+## Contributing
+
+The `getopts` library is used by `rustc`, so we have to be careful about not changing its behavior.