9d8f5a1466
we cannot call gc() in execute() because it will gc anonyous intermediate results which happens when we construct a list and the elements are calculated by calling a function thru ocall() which calls execute(). also, the _thiscmd symbol; which is used to keep a reference to a statement so it wont get garbage collected; does not work as yyparse() is recursive (include statements). we add execrec() function which *only* gets called from yyparse() when evaluating a statement. it will keep a stack on the _thiscmd symbol handling the yyparse() recursion. we also only call gc() in execrec() before calling execute(). so execute() will never gc() while evaluating a statement which prevents the intermediate results from getting collected. |
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