objective c - Memory leak in [[NSMutableArray alloc] init] even though with ARC -

i working heavily on memory fineturning , of problems solved of stackoverflow. got struck serious memory leak nsmutablearray initialization.

- (nsmutablearray *)children {      if (!_children) {          _children = [nsmutablearray new]; // <-- here memory leak     }      return _children; } 

• i working project using 100% arc.
• perticular class initialization not triggered none other main thread (no threading has been used).
• but... place using recurtion

• moreover statments

  @property (strong, nonatomic) nsmutablearray *children;

  @synthesize children = _children;

are there in respective .h , .m files...

waht can problem....?

thanks in advance effort...

more info...

- (id)init {      if (self = [super init]) {          [self setisroot:no]; //        [self setchildren:[nsmutablearray new]]; // <-- before, moved custom setter     }     return self; }  - (id)initasroot {     if (self = [self init]) {         self.level = -1;         self.index = -1;         self.isexpaned = yes;         self.value = @"root";         self.isroot = yes;     }     return self; }