From 74f7a2435d0fdfc0c59ab9afcf7e7a609bde41d6 Mon Sep 17 00:00:00 2001
From: kojix2 <2xijok@gmail.com>
Date: Fri, 28 May 2021 11:47:54 +0900
Subject: [PATCH] Added an error message suggesting to specify the character
 encoding option

---
 lib/youplot/command.rb | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/lib/youplot/command.rb b/lib/youplot/command.rb
index 84497e6..d6af939 100644
--- a/lib/youplot/command.rb
+++ b/lib/youplot/command.rb
@@ -102,8 +102,17 @@ module YouPlot
     end
 
     def read_dsv(input)
-      input = input.dup.force_encoding(options[:encoding]).encode('utf-8') if options[:encoding]
-      DSV.parse(input, options[:delimiter], options[:headers], options[:transpose])
+      if options[:encoding]
+        input.force_encoding(options[:encoding])
+             .encode!('utf-8')
+      end
+      begin
+        DSV.parse(input, options[:delimiter], options[:headers], options[:transpose])
+      rescue CSV::MalformedCSVError => e
+        warn 'Failed to parse the text. '
+        warn 'Please try to set the correct character encoding with --encoding option.'
+        raise e
+      end
     end
 
     def create_plot