*** a/src/backend/parser/gram.y
--- b/src/backend/parser/gram.y
***************
*** 60,69 ****
--- 60,75 ----
  #include "utils/date.h"
  #include "utils/datetime.h"
  #include "utils/numeric.h"
  #include "utils/xml.h"
  
+ /*
+  * bison does not re-use buffers, so we can redefine malloc/free
+  * to palloc/pfree.
+  */
+ #define malloc palloc
+ #define free   pfree
  
  /* Location tracking support --- simpler than bison's default */
  #define YYLLOC_DEFAULT(Current, Rhs, N) \
  	do { \
  		if (N) \
*************** TableFuncTypeName(List *columns)
*** 10017,10022 ****
--- 10023,10032 ----
   * Must undefine base_yylex before including scan.c, since we want it
   * to create the function base_yylex not filtered_base_yylex.
   */
  #undef base_yylex
  
+ /* scan.c needs real malloc */
+ #undef malloc
+ #undef free
+ 
  #include "scan.c"