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Stored range.size() before forwarding range. #1593

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Stored range.size() before forwarding range. #1593

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3 changes: 2 additions & 1 deletion asio/include/asio/experimental/impl/parallel_group.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -706,6 +706,7 @@ void ranged_parallel_group_launch(Condition cancellation_condition,
std::move(handler), range.size(), allocator);

std::size_t idx = 0;
std::size_t range_size = range.size();
for (auto&& op : std::forward<Range>(range))
{
typedef associated_executor_t<op_type> ex_type;
Expand All @@ -718,7 +719,7 @@ void ranged_parallel_group_launch(Condition cancellation_condition,

// Check if any of the operations has already requested cancellation, and if
// so, emit a signal for each operation in the group.
if ((state->cancellations_requested_ -= range.size()) > 0)
if ((state->cancellations_requested_ -= range_size) > 0)
for (auto& signal : state->cancellation_signals_)
signal.emit(state->cancel_type_);

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