The weld modifier was experiencing crashes due to the `switch_to`
variable occasionally pointing to a collapsed corner.
The encumbrance of the code implementation utilizing `switch_to` was
proving to be problematic as it was escalating the complexity of
maintenance.
To resolve the issue, a code rewrite was conducted.
The new implementation uses a `loop_next` in place of `switch_to` for
skipping corners.
This modification streamlined the code and improved its stability.
However, this solution does come with minor drawbacks. There is a small
increase in memory consumption and the corner group detection process
is now slightly more computational intensive.
Also the test files need to be updated.
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