mame	2018-01-13 22:08:05 +0900 (Sat, 13 Jan 2018)

  New Revision: 61811

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=61811

  Log:
    string.c (struct mapping_buffer): Use FLEX_ARY_LEN

  Modified files:
    trunk/string.c
Index: string.c
===================================================================
--- string.c	(revision 61810)
+++ string.c	(revision 61811)
@@ -6384,7 +6384,7 @@ typedef struct mapping_buffer { https://github.com/ruby/ruby/blob/trunk/string.c#L6384
     size_t capa;
     size_t used;
     struct mapping_buffer *next;
-    OnigUChar space[1];
+    OnigUChar space[FLEX_ARY_LEN];
 } mapping_buffer;
 
 static VALUE
@@ -6410,7 +6410,7 @@ rb_str_casemap(VALUE source, OnigCaseFol https://github.com/ruby/ruby/blob/trunk/string.c#L6410
 	if (CASEMAP_DEBUG) {
 	    fprintf(stderr, "Buffer allocation, capa is %"PRIuSIZE"\n", capa); /* for tuning */
 	}
-	current_buffer->next = xmalloc(offsetof(mapping_buffer, space) + capa);
+	current_buffer->next = xmalloc(sizeof(mapping_buffer) + capa);
 	current_buffer = current_buffer->next;
 	current_buffer->next = NULL;
 	current_buffer->capa = capa;

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