[Github-comments] [geany/geany] Push current position to navqueue before navigating back (#1537)

[Matthew Brush]

> Does it realistically ever not crash though?

It depends on the system, optimization level, what `NULL` actually is, and so on. For example, when the optimizer sees `doc->file_name` without any check that it's not `NULL` guarding it, it is free to re-write/optimize that code any way it sees fit, as long as the result is the same. It's possible that what it produces will do something different than segfault if `doc` ends up actually being `NULL`.

As to how likely/realistic it is, I cannot say, but it's never good to rely on undefined behaviour.

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