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Memory corruption crash
Hello! We are experiencing crashes on iOS both in debug and release builds in a game made in Godot 3.5.1. The main problem is that we don’t know where exactly the problem is and cannot understand how could we find a way to fix it. We don't expect that someone here will know how to fix this on Godot's side, but we would appreciate some help on how to get more info about the problem and potentially fix it. Debug builds: It is way more frequent in debug builds when we make a build, open it in Xcode, and install it directly on an iOS device. The first type of the crash in debug build is occurring like 70% of the time when the game is loading and trying to get into its main menu. The thing we are getting in Xcode looks like on first image below. Another type of crash happens when we open some save files and start the actual playable part of the game. It happens just after moving the character a few steps and it looks like on second image below. We are aware that the log recommends using breakpoints to find where exactly the problem is, but the thing is that we don’t know where we could do that in Xcode. We are not sure if we are missing something in Xcode or if we cannot do that when opening a project made in Godot. We tried many different builds with removed shader files, and scenes and changed different kinds of settings. We would get the same crash every time. When we made a new build, we cleared the build’s folder. Also, we occasionally deleted the .import folder of the project during development and reimported it. The problem occurred on many different iOS devices with more than 4GB of RAM. Release builds: These builds are uploaded on TestFlight. In release builds crashes wouldn’t occur like in debug builds. They would happen like totally randomly. In some testing sessions, it would happen like 10 minutes in the game, and in others in a few hours. Some testers couldn’t get the crash and altogether and we couldn’t find some repro steps to produce these crashes. In the attached files, you can find logs that we managed to collect from TestFlight. The most frequent type of the crash that we got, is following: Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Subtype: KERN_INVALID_ADDRESS Additional info: From reading Apple’s documentation Investigating memory access crashes, we got it that the problem is in “Invalid memory fetch”, but we couldn’t find how this could help us with further investigation. When we used Address Sanitizer tool and made a build, suddently the game stopped crashing in debug builds like it did before. Also we then didn't receive logs in Xcode that would hint us that something is going on. Tried to build our project in newer version of Godot, but the problem still persisted. Used software and hardware: Godot 3.5.1 macOS, Ventura, 13.5 Xcode, 15.2 iPad Air (5th generation), 17.4.1 MacBook Pro, Apple M1 If you have some clues or ideas on how to fix this problem, please write it, it would mean us a lot. Don’t hesitate to ask questions if something is unclear. Thank you very much in advance!
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May ’24