Import bigdecimal 1.4.0.pre.20181205a

* https://github.com/ruby/bigdecimal/compare/74d25ef..v1.4.0.pre.20181205a

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66222 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 19 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 3cf998b9da..139197fd94 100644
--- a/NEWS
+++ b/NEWS
@@ -331,6 +331,11 @@ sufficient information, see the ChangeLog file or Redmine
 
   * Use 1.17.1. It's latest stable version.
 
+[BigDecimal]
+
+  Update to the version 1.4.0.  This version includes several compatibility
+  issues, see Compatibility issues section below for the detail.
+
 [Coverage]
 
   A oneshot_lines mode is added.  [Feature #15022]
@@ -489,6 +494,20 @@ sufficient information, see the ChangeLog file or Redmine
   * thwait
   * tracer
 
+[BigDecimal]
+
+  * The following methods are removed.
+
+    * BigDecimal.allocate
+    * BigDecimal.new
+    * BigDecimal.ver
+
+  * Every BigDecimal object is frozen. [Feature #13984]
+
+  * BigDecimal() parses the given string like Float().
+
+  * String#to_d parses the receiver string like String#to_f.
+
 === C API updates
 
 === Supported platform changes