From 6b3b9965421f8a8320af0f5c10d285f5a2739d27 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Mon, 28 Sep 2015 02:40:46 +0000
Subject: preserve encodings in error messages

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51962 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 sprintf.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'sprintf.c')

diff --git a/sprintf.c b/sprintf.c
index 4549791d20..afe27c2d63 100644
--- a/sprintf.c
+++ b/sprintf.c
@@ -1338,6 +1338,26 @@ ruby__sfvextra(rb_printf_buffer *fp, size_t valsize, void *valp, long *sz, int s
 	rb_raise(rb_eRuntimeError, "rb_vsprintf reentered");
     }
     if (sign == '+') {
+	if (RB_TYPE_P(value, T_CLASS)) {
+# define LITERAL(str) (*sz = rb_strlen_lit(str), str)
+
+	    if (value == rb_cNilClass) {
+		return LITERAL("nil");
+	    }
+	    else if (value == rb_cFixnum) {
+		return LITERAL("Fixnum");
+	    }
+	    else if (value == rb_cSymbol) {
+		return LITERAL("Symbol");
+	    }
+	    else if (value == rb_cTrueClass) {
+		return LITERAL("true");
+	    }
+	    else if (value == rb_cFalseClass) {
+		return LITERAL("false");
+	    }
+# undef LITERAL
+	}
 	value = rb_inspect(value);
     }
     else {
-- 
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