Method MOODYCAMEL_CATCH

concurrentqueue.h:1943–1949

						new ((*this->tailBlock)[currentTailIndex]) T(std::forward<U>(element));
					}
					MOODYCAMEL_CATCH (...) {
						// Revert change to the current block, but leave the new block available
						// for next time
						pr_blockIndexSlotsUsed = originalBlockIndexSlotsUsed;
						this->tailBlock = startBlock == nullptr ? this->tailBlock : startBlock;
						MOODYCAMEL_RETHROW;
					}
				}
				else {
					(void)startBlock;