[RLMMigration] Call enumeration blocks inside an autoreleasepool

[segiddins]

Closes #2205.

\c @tgoyne

[tgoyne]

changelog

[segiddins]

changelog added

[tgoyne]

👍

[porsager]

Hi @segiddins

Cool - that's some very fast action right there ! :)

I use swift 2.0, so i tried merging this branch with the swift-2.0 branch and run the same migration with it. It goes to about 80mb of memory usage and then just freezes there forever.

I don't know if it's of any help, but if i pause in the debugger the stack looks like this:

#0 0x0399154a in __psynch_mutexwait ()
#1 0x03958210 in _pthread_mutex_lock ()
#2 0x03958003 in pthread_mutex_lock ()
#3 0x003fea61 in realm::util::RobustMutex::low_level_lock() ()
#4 0x004aa3d3 in realm::SharedGroup::do_begin_write() ()
#5 0x004aa297 in realm::SharedGroup::begin_write() ()
#6 0x003c54cb in realm::SharedGroup::upgrade_file_format()

Thanks for the very quick reaction!

[segiddins]

@porsager that's probably a different issue -- can you share a project that demonstrates that problem with us?

[segiddins]

Test failures appear unrelated?

[jpsim]

@segiddins please rebase this

[segiddins]

Rebased

[porsager]

@segiddins You are right it is independent of this issue. Would you want me to create a new issue for it, or can i email you a test project with the issue?

[segiddins]

@porsager an email with a test project would be perfect, thanks!

[jpsim]

👍