tarui	2018-06-23 22:58:51 +0900 (Sat, 23 Jun 2018)

  New Revision: 63733

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=63733

  Log:
    gc.c (ruby_mimmalloc): add initialize code for USE_GC_MALLOC_OBJ_INFO_DETAILS
    
    We often had SEGV in ruby_xfree when USE_GC_MALLOC_OBJ_INFO_DETAILS is 1

  Modified files:
    trunk/gc.c
Index: gc.c
===================================================================
--- gc.c	(revision 63732)
+++ gc.c	(revision 63733)
@@ -8247,6 +8247,13 @@ ruby_mimmalloc(size_t size) https://github.com/ruby/ruby/blob/trunk/gc.c#L8247
     {
         struct malloc_obj_info *info = mem;
         info->size = 0;
+#if USE_GC_MALLOC_OBJ_INFO_DETAILS
+        info->gen = 0;
+        info->file = NULL;
+        info->line = 0;
+#else
+        info->file = NULL;
+#endif
         mem = info + 1;
     }
 #endif

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