Open Radar

 
Summary:
The test app attached includes 2 frameworks I've built. The frameworks are copied using a copy files phase into the Frameworks directory of the app. I have the following app delegate code:

    #import "AppDelegate.h"
    @import ObjectiveC;

    @implementation AppDelegate

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        [[NSBundle allFrameworks] enumerateObjectsUsingBlock:^(NSBundle *framework, NSUInteger idx, BOOL *stop) {
            unsigned int count = 0;
            __unused const char** classes = objc_copyClassNamesForImage([[framework executablePath] UTF8String], &count);
            NSRange inFramework = [framework.executablePath rangeOfString:@".app/Frameworks"];
            if (inFramework.length > 0) {
                NSLog(@"Framework %@, classes: %i", framework.executablePath.lastPathComponent, count);
            }
        }];
        return YES;
    }

@end

Which prints out the frameworks from the Frameworks directory and the number of classes contained in each. 

When I run this code in the simulator I get the following results:

    2016-11-04 12:02:17.682 RuntimeTest[54326:623229] Framework PEGKit, classes: 24
    2016-11-04 12:02:17.707 RuntimeTest[54326:623229] Framework StoryTeller, classes: 10

However when I run it on a device I get:

    2016-11-04 12:07:04.215417 RuntimeTest[1035:365233] Framework PEGKit, classes: 0
    2016-11-04 12:07:04.254946 RuntimeTest[1035:365233] Framework StoryTeller, classes: 0

The device is an iPhone 7 with iOS 10.1. I'm pretty sure that this code has worked in the past and it appears that `objc_copyClassNamesForImage` is somehow broken.

My working theory is that this could be some 10.1 bug. Or perhaps something that is set/not set in the build properties.

Steps to Reproduce:
1. Open the test app.
2. run the app. 
3. Examine console output.
4. Compare simulator results to device results.

Expected Results:
Both frameworks are listed with their correct number of classes.

Actual Results:
In simulator the numbers are correct. On the device the console shows 0 classes in both frameworks.

Version:
OS X 10.12

Notes:


Configuration:
Xcode 8.1 GM, iPhone 7 with 10.1

Attachments:
'RuntimeTest.zip' was successfully uploaded.