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BUGFIX: accidentally altering 'decorators' slice #620

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Dec 29, 2022
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BUGFIX: accidentally altering 'decorators' slice #620

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5 changes: 4 additions & 1 deletion cel/program.go
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Original file line number Diff line number Diff line change
Expand Up @@ -213,7 +213,10 @@ func newProgram(e *Env, ast *Ast, opts []ProgramOption) (Program, error) {
factory := func(state interpreter.EvalState, costTracker *interpreter.CostTracker) (Program, error) {
costTracker.Estimator = p.callCostEstimator
costTracker.Limit = p.costLimit
decs := decorators
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// Limit capacity to guarantee a reallocation when calling 'append(decs, ...)' below. This
// prevents the underlying memory from being shared between factory function calls causing
// undesired mutations.
decs := decorators[:len(decorators):len(decorators)]
var observers []interpreter.EvalObserver

if p.evalOpts&(OptExhaustiveEval|OptTrackState) != 0 {
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