__block variables have been capture by the block，but 'dispose_helper' error

[zjutwhw]

__block variables have been capture by the block，but 'dispose_helper' error , Demo：

__weak CDItem *item = [CDItem new]; __block NSInteger index = 10; void (^callblock)(NSString *name) = ^(NSString *name){ item.name = name; index = 20; }; callblock(@"jack"); void *block = (__bridge void *)callblock; NSIndexSet *set = GetBlockStrongLayout(block); // FBBlockStrongLayout中_GetBlockStrongLayout(...)实现

error： dispose_helper -- Thread 1: EXC_BAD_ACCESS (code=1, address=0x10)

[zjutwhw]