Rescue conversion error of inputrc

lib/reline.rb

@@ -13,6 +13,8 @@ module Reline
   FILENAME_COMPLETION_PROC = nil
   USERNAME_COMPLETION_PROC = nil
 
+  class ConfigEncodingConversionError < StandardError; end
+
   Key = Struct.new('Key', :char, :combined_char, :with_meta)
   CursorPos = Struct.new(:x, :y)
 

lib/reline/config.rb

@@ -159,7 +159,14 @@ class Reline::Config
 
   def read_lines(lines, file = nil)
     if lines.first.encoding != Reline.encoding_system_needs
-      lines = lines.map { |l| l.encode(Reline.encoding_system_needs) }
+      begin
+        lines = lines.map do |l|
+          l.encode(Reline.encoding_system_needs)
+        rescue Encoding::UndefinedConversionError
+          mes = "The inputrc encoded in #{lines.first.encoding.name} can't be converted to the locale #{Reline.encoding_system_needs.name}."
+          raise Reline::ConfigEncodingConversionError.new(mes)
+        end
+      end
     end
     conditions = [@skip_section, @if_stack]
     @skip_section = nil

test/reline/test_config.rb

@@ -295,6 +295,8 @@ class Reline::Config::Test < Reline::TestCase
     LINES
     assert_equal '🍸', @config.vi_cmd_mode_string
     assert_equal '🍶', @config.vi_ins_mode_string
+  rescue Reline::ConfigEncodingConversionError
+    # do nothing
   end
 
   def test_inputrc_with_eucjp
@@ -305,6 +307,8 @@ class Reline::Config::Test < Reline::TestCase
     LINES
     assert_equal 'ｫｬｯ'.encode(Reline.encoding_system_needs), @config.vi_cmd_mode_string
     assert_equal '能'.encode(Reline.encoding_system_needs), @config.vi_ins_mode_string
+  rescue Reline::ConfigEncodingConversionError
+    # do nothing
   end
 
   def test_xdg_config_home