https://git.ruby-lang.org/ruby.git/commit/?id=1d996fe72f

From 1d996fe72fc20fbc88f07b4b8d34b99aacc688f3 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@r...>
Date: Mon, 23 Mar 2020 10:54:44 +0900
Subject: test/ruby/test_m17n.rb: Update the debugging code to get C stacktrace


diff --git a/test/ruby/test_m17n.rb b/test/ruby/test_m17n.rb
index 321a356..fee3835 100644
--- a/test/ruby/test_m17n.rb
+++ b/test/ruby/test_m17n.rb
@@ -315,28 +315,9 @@ class TestM17N < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_m17n.rb#L315
     begin
       "abc".encode(Encoding.default_external)
     rescue Encoding::CompatibilityError
-      $stderr.puts :debug_1.inspect
-      $stderr.puts $!.inspect
-      $stderr.puts *$!.backtrace
-      $stderr.puts "abc".encoding.inspect
-      $stderr.puts Encoding.default_external.inspect
-    end
-    begin
-      [o].inspect
-    rescue Encoding::CompatibilityError
-      $stderr.puts :debug_2.inspect
-      $stderr.puts $!.inspect
-      $stderr.puts *$!.backtrace
-      $stderr.puts "abc".encoding.inspect
-      $stderr.puts Encoding.default_external.inspect
-      begin
-        $stderr.puts o.inspect.inspect
-        $stderr.puts :debug_3.inspect
-      rescue Encoding::CompatibilityError
-        $stderr.puts :debug_4.inspect
-        $stderr.puts $!.inspect
-        $stderr.puts *$!.backtrace
-      end
+      TracePoint.new(:raise) do |tp|
+        Process.kill(:SEGV, $$)
+      end.enable { "abc".encode(Encoding.default_external) }
     end
     # debugging code end
 
-- 
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