Crash in MAS library

Products

• CA Mobile API Gateway

Issue/Introduction

We have encountered a crash in MAS library (using build 2.2 for iOS) due to array mutating while being enumerated:

 

Exception Type:  EXC_CRASH (SIGABRT)

Exception Codes: 0x0000000000000000, 0x0000000000000000

Triggered by Thread:  19

 

Application Specific Information:

abort() called

 

Last Exception Backtrace:

0   CoreFoundation                               0x187e44cb4 __exceptionPreprocess + 164

1   libobjc.A.dylib                                  0x180eec3d0 objc_exception_throw + 60

2   CoreFoundation                               0x187fb1920 -[__NSSingleObjectEnumerator init] + 0

3   MASFoundation                              0x10186cb10 -[MASURLSessionManager taskOperationWithTask:] + 160

4   MASFoundation                              0x10186cd5c -[MASURLSessionManager removeSessionTaskFromOperations:] + 20

5   MASFoundation                              0x10186cf34 -[MASURLSessionManager URLSession:task:didCompleteWithError:] + 140

 

As a hotfix, we could do this update on MASURLSessionManager.m:

 

- (MASSessionTaskOperation *)taskOperationWithTask:(NSURLSessionTask *)task

{

    MASSessionTaskOperation *taskOperation = nil;

   

    for (MASSessionTaskOperation *operation in [self.operations copy])

    {

        if ([operation.task isEqual:task])

        {

            taskOperation = operation;

        }

    }

   

    return taskOperation;

}

 

 

- (MASSessionDataTaskOperation *)dataTaskOperationWithDataTask:(NSURLSessionDataTask *)dataTask

{

    MASSessionDataTaskOperation *dataTaskOperation = nil;

   

    for (MASSessionDataTaskOperation *operation in [self.operations copy])

    {

        if ([operation.task isEqual:dataTask])

        {

            dataTaskOperation = operation;

        }

    }

   

    return dataTaskOperation;

}

 

Issue Description:

Failing scenarios:

If it is searching for taskoperation  t3 in array [t1, t2, t3 ] and t3 got removed during the iteration,  then currently it is returning t2 instead of t3 . What is the expected behavior. Should it return nil ? Currently it is returning t2 which, looks like incorrect.

 

Environment

Release : 4.2

Cause

Code bug.

Resolution

The issue has been resolved by a fix.  Request the patch through the support.