Hi, When openeing a kicad_pcb and storing it again, the pads in all embedded modules get reversed. This is generally not really nice if the pcb is managed by version control as it creates churn and could make merges hard.
The problem is that pads are inserted rather than appended when loading a pcb, so the pads are reversed on reading. The attached patch that fixes that. In general, there are more places of Add() where ADD_APPEND would probably make more sense (e.g. in the copy constructor and the assignment operator for MODULE), but I have not touched these here as it requires more thorough inspection. The fact that the default behavior is ADD_INSERT probably results in a lot of trouble. I wonder when _ever_ someone means to insert things in the beginning ? It feels like a rare operation. Maybe not making the kind of insert operation a default parameter of the Add() function but rather have the user decide every time which operation is needed - this might reduce the accidents like this (in particular, since the name of the operation, Add(), kindof more strongly implies appending). (and I would almost bet that we don't even need ADD_INSERT so could simplify a lot of places). Anyway, something I might look into when having a little more time (all BOARD_ITEM_CONTAINER have that, so there are probably more bugs like this lurking). This is the second issue like that I noticed (last year same with segments). For now a simple patch that fixes the issue at hand. Cheers, Henner.
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