gist.h:

/*
** You can have as many strategies as you please in GiSTs, as
** long as your consistent method can handle them
*/
#define GISTNStrategies                 100
                                        ^^^
- too big number:

strat.h->StrategyEvaluationData->StrategyExpression  expression[12]
                                                                ^^
 - so 12 is real max # of strategies, or StrategyEvaluationIsValid
crashes backend (called if CASSER defined).

src/include/access/gist.h

@@ -24,9 +24,16 @@
 /* 
 ** You can have as many strategies as you please in GiSTs, as
 ** long as your consistent method can handle them
-*/
+**
+** But strat.h->StrategyEvaluationData->StrategyExpression  expression[12]
+** - so 12 is real max # of strategies, or StrategyEvaluationIsValid
+** crashes backend...		- vadim 05/21/97
+
 #define GISTNStrategies			100
 
+*/
+#define GISTNStrategies			12
+
 /*
 ** Helper routines
 */