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fix(SpiralIterator): Avoid improper use of '++', which may cause prog… #479

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This PR addresses an issue in the SpiralIterator::operator++() function where the pop_back() method was called on an empty pointsRing_ container, leading to undefined behavior. The fix involves adding a check to ensure that pointsRing_ is not empty before attempting to call pop_back(). This change prevents potential crashes and ensures the iterator operates correctly even when the container is empty.
This change ensures the iterator’s robustness and prevents potential runtime errors.

@Ryanf55 Ryanf55 added the ros1 Affects ROS 1 label Nov 8, 2024
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@Ryanf55 Ryanf55 added the bug label Nov 8, 2024
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Ryanf55 commented Nov 8, 2024

@maximilianwulf Please merge this fix

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