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The footprint scratch buffers were file-level statics shared by all GtkSatMap instances. Every new map reallocated them (leaking the old ones) and destroying any map freed them and set them to NULL, so the remaining maps segfaulted in calculate_footprint() on their next update, e.g. after closing one of two open copies of the same module. Make the buffers per-instance members of GtkSatMap.
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The footprint scratch buffers were file-level statics shared by all GtkSatMap instances. Every new map reallocated them (leaking the old ones) and destroying any map freed them and set them to NULL, so the remaining maps segfaulted in calculate_footprint() on their next update, e.g. after closing one of two open copies of the same module.
Make the buffers per-instance members of GtkSatMap.
replicate by open the module "Amateur" twice then close one of the two modules.