https://git.ruby-lang.org/ruby.git/commit/?id=2f66c443d7

From 2f66c443d79bb3a2d5518dbe58ca86885bc23d5c Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@r...>
Date: Fri, 29 Nov 2019 17:46:13 +0900
Subject: Support argument for ErrNotRegular


diff --git a/lib/matrix.rb b/lib/matrix.rb
index b4d1be3..cf1d532 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -28,8 +28,12 @@ module ExceptionForMatrix # :nodoc: https://github.com/ruby/ruby/blob/trunk/lib/matrix.rb#L28
   end
 
   class ErrNotRegular < StandardError
-    def initialize
-      super("Not Regular Matrix")
+    def initialize(val = nil)
+      if val
+        super(val)
+      else
+        super("Not Regular Matrix")
+      end
     end
   end
 
-- 
cgit v0.10.2


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