Percent characters not escaped in ios-sim output - Segmentation fault: 11

[amleszk]

need to escape in

int nsprintf (NSString *format, ...)

Stacktrace:

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 com.apple.CoreFoundation 0x00007fff8a460917 CFStringAppendFormatCore + 9495
1 com.apple.CoreFoundation 0x00007fff8a45e229 CFStringCreateWithFormatAndArguments + 105
2 ios-sim 0x00000001000037b1 nsvfprintf + 49
3 ios-sim 0x0000000100003b45 nsprintf + 373
4 ios-sim 0x0000000100001ecc -[iPhoneSimulator stdioDataIsAvailable:] + 364
5 com.apple.Foundation 0x00007fff8aab9d32 __-[NSNotificationCenter addObserver:selector:name:object:]_block_invoke_1 + 47
6 com.apple.CoreFoundation 0x00007fff8a4a6aaa _CFXNotificationPost + 2634
7 com.apple.Foundation 0x00007fff8aaa5fe7 -[NSNotificationCenter postNotificationName:object:userInfo:] + 65
8 com.apple.Foundation 0x00007fff8ab726c1 _performFileHandleSource + 1129
9 com.apple.CoreFoundation 0x00007fff8a46c6e1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
10 com.apple.CoreFoundation 0x00007fff8a46bf4d __CFRunLoopDoSources0 + 253
11 com.apple.CoreFoundation 0x00007fff8a492d39 __CFRunLoopRun + 905
12 com.apple.CoreFoundation 0x00007fff8a492676 CFRunLoopRunSpecific + 230
13 com.apple.Foundation 0x00007fff8aaaef9f -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 267
14 com.apple.Foundation 0x00007fff8aaaee8b -[NSRunLoop(NSRunLoop) run] + 62
15 ios-sim 0x0000000100003760 main + 192
16 ios-sim 0x0000000100001694 start + 52