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transforms.iodelay_estimator: do not unify indeterminate delays.
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@ -101,6 +101,12 @@ class IODelayEstimator(algorithm.Visitor):
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self.current_return = old_return
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self.current_return = old_return
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self.current_args = old_args
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self.current_args = old_args
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if types.is_indeterminate_delay(delay) and types.is_indeterminate_delay(typ.delay):
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# Both delays indeterminate; no point in unifying since that will
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# replace the lazy and more specific error with an eager and more generic
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# error (unification error of delay(?) with delay(?), which is useless).
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return
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try:
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try:
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typ.delay.unify(delay)
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typ.delay.unify(delay)
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except types.UnificationError as e:
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except types.UnificationError as e:
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