An issue was discovered in GPAC version 0.8.0 and 1.0.1. There is an invalid pointer dereference in the function SetupWriters() in isomedia/isom_store.c.
https://github.com/gpac/gpac/issues/1659
https://github.com/gpac/gpac/commit/dae9900580a8888969481cd72035408091edb11b