Bison 3.7 - fix "conversion from 'ptrdiff_t' to 'ulong', possible loss of data"

sql/sql_parse.cc

@@ -7226,10 +7226,10 @@ bool check_stack_overrun(THD *thd, long margin,
 #define MY_YACC_INIT 1000			// Start with big alloc
 #define MY_YACC_MAX  32000			// Because of 'short'
 
-bool my_yyoverflow(short **yyss, YYSTYPE **yyvs, ulong *yystacksize)
+bool my_yyoverflow(short **yyss, YYSTYPE **yyvs, size_t *yystacksize)
 {
   Yacc_state *state= & current_thd->m_parser_state->m_yacc;
-  ulong old_info=0;
+  size_t old_info=0;
   DBUG_ASSERT(state);
   if ((uint) *yystacksize >= MY_YACC_MAX)
     return 1;

sql/sql_yacc.yy

@@ -76,7 +76,7 @@ int yylex(void *yylval, void *yythd);
 
 #define yyoverflow(A,B,C,D,E,F)               \
   {                                           \
-    ulong val= *(F);                          \
+    size_t val= *(F);                         \
     if (my_yyoverflow((B), (D), &val))        \
     {                                         \
       yyerror(thd, (char*) (A));              \
@@ -1024,7 +1024,7 @@ Virtual_column_info *add_virtual_expression(THD *thd, Item *expr)
 }
 
 %{
-bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
+bool my_yyoverflow(short **a, YYSTYPE **b, size_t *yystacksize);
 %}
 
 %pure-parser                                    /* We have threads */