mrkn	2018-12-03 18:21:39 +0900 (Mon, 03 Dec 2018)

  New Revision: 66158

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=66158

  Log:
    NEWS: write about bigdecimal updates
    
    [ci skip]

  Modified files:
    trunk/NEWS
Index: NEWS
===================================================================
--- NEWS	(revision 66157)
+++ NEWS	(revision 66158)
@@ -320,6 +320,11 @@ sufficient information, see the ChangeLo https://github.com/ruby/ruby/blob/trunk/NEWS#L320
 
   * 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]
@@ -478,6 +483,20 @@ sufficient information, see the ChangeLo https://github.com/ruby/ruby/blob/trunk/NEWS#L483
   * 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

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