From 3f0e8919b5e1e7ea3066b87bae2b5fa07df4d2de Mon Sep 17 00:00:00 2001
From: Justin Ethier <justin.ethier@gmail.com>
Date: Thu, 16 Mar 2017 21:35:05 +0000
Subject: [PATCH] Added a 0.4.1 section

---
 CHANGELOG.md | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8b7e1f43..b5404491 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,22 @@
 # Changelog
 
+## TBD (Tenatively 0.4.1)
+
+Features
+
+- Store parameter objects in such a way that changes to a parameter object do not affect other threads that use the same parameter object.
+
+The specific requirement from R<sup>7</sup>RS is:
+
+> `parameterize` must not change the associated values of any parameters in any thread other than the current thread and threads created inside the `parameterize` body.
+
+- Normalize the result of `string->number` such that bignums are only returned if the result truly is a bignum.
+
+Bug Fixes
+
+- Prevent exception handlers from being accidentally collected when the collector cooperates on behalf of a mutator.
+- Fixed a regression where `string->number` returns `0` on bad input instead of `#f`.
+
 ## 0.4 - March 9, 2017
 
 - Added a new bignum type to support exact integers of practically unlimited size.