After our upgrade to Xcode 15.3, our app compiles and builds, but when we run it on an iPhone it crashes with EXC_BAD_ACCESS (code=1, address=0x15b) upon starting. We're using Qt and the crash occurs when we try to access our app's sqlite file with QSqlQuery::exec(). The EXC_BAD_ACCESS occurs when trying to run a SELECT or PRAGMA statement to read from the sqlite. Running an INSERT or DELETE with the exec() method does not result in an exception; we just get an error saying that the table in the command does not exist. exec() crashes when it gets to sqlite3VdbeMemGrow in the sqlite3VdbeMemStringify call. We're using a "solid" QSqlQuery object variable in our code, not a pointer to a QSqlQuery object, so it's not like our code is using an uninitialized pointer. We tried the suggestion in this post that references this project's bug tracker and changed our iOS Minimum Deployment setting in Xcode from 11.0 to 13.0, but this didn't resolve the issue. I hypothesized that perhaps the Xcode update prohibits the main thread from doing file access, but after preventing our main thread from doing any accessing of the sqlite file, we still get EXC_BAD_ACCESS (code=1, address=0x15b) from a separate thread that tries to access the sqlite file. I hypothesized that perhaps it was a file access permission issue when I saw the app trying to use the sqlite file out of the "Documents" folder /var/mobile/Containers/Data/Application/AAC50B3C-4DCF-4122-B88A-FC631E6BB9A0/Documents. I changed the app to use a different container sub folder but that gave different errors: QIODevice::write (QFile, "/var/mobile/Containers/Data/Application/E64A08B4-5F59-433E-9111-D503F190383F/Library/Application Support/ELD/log.txt"): device not open which would be our app's log file. The sqlite commands all give database not open responses. Another thread suggested downgrading Xcode, but we also got the EXC_BAD_ACCESS with Xcode 15.0.1. Thanks for your time!

Thanks for the read. Yesterday morning all was well, but around noon I started getting the following errors: Undefined symbol: OBJC_CLASS$_NEHotspotConfiguration Undefined symbol: OBJC_CLASS$_NEHotspotConfigurationManager As you can see in the screenshot at the bottom my app has the "Hotspot Configuration" entitlement. I have confirmed that the entitlement is also present in my app's entitlement file with the value "YES". However, the "undefined symbol" errors won't go away. I've tried cleaning, rebuilding, reinstalling Xcode, rebooting the iMac, and adding every available capability to my app's entitlements. As I said, this was building fine yesterday, and I didn't modify any of my code interacting with NEHotspotConfiguration. I working in Objective C. The following code is sufficient to trigger the Undefined symbol: _OBJC_CLASS_$_NEHotspotConfigurationManager error: #import <Foundation/Foundation.h> #import <UIKit/UIKit.h> #import <NetworkExtension/NetworkExtension.h> #import <SystemConfiguration/CaptiveNetwork.h> void IosUtility::disconnectFromDashcamWifi( const QString& ssid ) {     NSLog( @"disconnectFromDashcamWifi enter" );     [[NEHotspotConfigurationManager sharedManager] removeConfigurationForSSID:ssid.toNSString()];     NSLog( @"disconnectFromDashcamWifi exit" ); } Do you have any ideas for how to get things back on the rails?