nobu	2015-05-21 14:03:55 +0900 (Thu, 21 May 2015)

  New Revision: 50580

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=50580

  Log:
    digest.c: GC guard
    
    * ext/digest/digest.c (hexencode_str_new, rb_digest_base_update):
      prevent argument strings from GC.

  Modified files:
    trunk/ext/digest/digest.c
Index: ext/digest/digest.c
===================================================================
--- ext/digest/digest.c	(revision 50579)
+++ ext/digest/digest.c	(revision 50580)
@@ -124,6 +124,8 @@ hexencode_str_new(VALUE str_digest) https://github.com/ruby/ruby/blob/trunk/ext/digest/digest.c#L124
         p[i + i + 1] = hex[byte & 0x0f];
     }
 
+    RB_GC_GUARD(str_digest);
+
     return str;
 }
 
@@ -623,6 +625,7 @@ rb_digest_base_update(VALUE self, VALUE https://github.com/ruby/ruby/blob/trunk/ext/digest/digest.c#L625
 
     StringValue(str);
     algo->update_func(pctx, (unsigned char *)RSTRING_PTR(str), RSTRING_LEN(str));
+    RB_GC_GUARD(str);
 
     return self;
 }

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