Assertion failed: (asyncRender)

[mb12]

The following steps consistently reproduce the assert failure.

1. use the sample 'iosapp' and switch between different styles.
2. tap on the "My Location icon" while the new style is loading.

Assertion failed: (asyncRender), function rerender, file /Users/mb/Documents/MAPBOX_MASON_SCRATCH/mapbox-gl-native/src/mbgl/map/map.cpp, line 261.
(lldb) bt
* thread #35: tid = 0x282290, 0x3a90b1f0 libsystem_kernel.dylib`__pthread_kill + 8, name = 'Map', stop reason = signal SIGABRT
    frame #0: 0x3a90b1f0 libsystem_kernel.dylib`__pthread_kill + 8
    frame #1: 0x3a975796 libsystem_pthread.dylib`pthread_kill + 58
    frame #2: 0x3a8bbfdc libsystem_c.dylib`abort + 76
    frame #3: 0x3a89bcae libsystem_c.dylib`__assert_rtn + 182
  * frame #4: 0x000bdf90 Mapbox GL`mbgl::Map::rerender(this=0x17d819c0) + 144 at map.cpp:261
    frame #5: 0x000be036 Mapbox GL`mbgl::Map::update(this=0x17d819c0) + 110 at map.cpp:268
    frame #6: 0x000c20dc Mapbox GL`mbgl::Map::updateTiles(this=0x17ebb1dc)::$_7::operator()() const + 32 at map.cpp:568
    frame #7: 0x000c1ff8 Mapbox GL`std::__1::__function::__func<mbgl::Map::updateTiles()::$_7, std::__1::allocator<mbgl::Map::updateTiles()::$_7>, void ()>::operator()() [inlined] decltype(this=0x17ebb1dc, __f=0x17ebb1dc)::$_7&>(fp)(std::__1::forward<>(fp0))) std::__1::__invoke<mbgl::Map::updateTiles()::$_7&>(mbgl::Map::updateTiles()::$_7&&&) + 10 at __functional_base:413
    frame #8: 0x000c1fee Mapbox GL`std::__1::__function::__func<mbgl::Map::updateTiles(this=0x17ebb1d8)::$_7, std::__1::allocator<mbgl::Map::updateTiles()::$_7>, void ()>::operator()() + 38 at functional:1370
    frame #9: 0x00180656 Mapbox GL`std::__1::function<void (this=0x17ebb1d8)>::operator()() const + 146 at functional:1755
    frame #10: 0x000ebe04 Mapbox GL`mbgl::TileData::reparse(this=0x17ebb1d8, (null)=0x17e1add0)>)::$_3::operator()(mbgl::util::ptr<mbgl::TileData>&) const + 32 at tile_data.cpp:101
    frame #11: 0x000ebd1c Mapbox GL`std::__1::__function::__func<mbgl::TileData::reparse(uv::worker&, std::__1::function<void ()>)::$_3, std::__1::allocator<mbgl::TileData::reparse(uv::worker&, std::__1::function<void ()>)::$_3>, void (mbgl::util::ptr<mbgl::TileData>&)>::operator()(mbgl::util::ptr<mbgl::TileData>&) [inlined] decltype(this=0x17ebb1d8, __f=0x17ebb1d8, __args=0x17e1add0)>)::$_3&>(fp)(std::__1::forward<mbgl::util::ptr<mbgl::TileData>&>(fp0))) std::__1::__invoke<mbgl::TileData::reparse(uv::worker&, std::__1::function<void ()>)::$_3&, mbgl::util::ptr<mbgl::TileData>&>(mbgl::TileData::reparse(uv::worker&, std::__1::function<void ()>)::$_3&&&, mbgl::util::ptr<mbgl::TileData>&&&) + 16 at __functional_base:413
    frame #12: 0x000ebd0c Mapbox GL`std::__1::__function::__func<mbgl::TileData::reparse(this=0x17ebb1d0, __arg=0x17e1add0)>)::$_3, std::__1::allocator<mbgl::TileData::reparse(uv::worker&, std::__1::function<void ()>)::$_3>, void (mbgl::util::ptr<mbgl::TileData>&)>::operator()(mbgl::util::ptr<mbgl::TileData>&) + 48 at functional:1370
    frame #13: 0x000ef582 Mapbox GL`std::__1::function<void (this=0x17e1adf0, __arg=0x17e1add0)>::operator()(mbgl::util::ptr<mbgl::TileData>&) const + 158 at functional:1755
    frame #14: 0x000ef4aa Mapbox GL`uv::work<mbgl::util::ptr<mbgl::TileData> >::after_work(data=0x17e1add0) + 38 at uv_detail.hpp:165
    frame #15: 0x00225ba2 Mapbox GL`uv__worker_after(ptr=0x1da661e0) + 130 at uv-worker.c:56
    frame #16: 0x00225890 Mapbox GL`uv__messenger_callback(async=0x1d986ecc, status=0) + 104 at uv-messenger.c:37
    frame #17: 0x0022c676 Mapbox GL`uv__async_event(loop=0x17d81b50, w=0x17d81c28, nevents=1) + 126 at async.c:80
    frame #18: 0x0022c91e Mapbox GL`uv__async_io(loop=0x17d81b50, w=0x17d81c2c, events=1) + 190 at async.c:156
    frame #19: 0x0023f704 Mapbox GL`uv__io_poll(loop=0x17d81b50, timeout=-1) + 2252 at kqueue.c:233
    frame #20: 0x0022cdde Mapbox GL`uv_run(loop=0x17d81b50, mode=UV_RUN_DEFAULT) + 130 at core.c:317
    frame #21: 0x000bd5fa Mapbox GL`mbgl::Map::run(this=0x17d819c0) + 330 at map.cpp:238
    frame #22: 0x000c2d30 Mapbox GL`mbgl::Map::start(this=0x17d2ed70)::$_5::operator()() const + 192 at map.cpp:189
    frame #23: 0x000c2b26 Mapbox GL`void* std::__1::__thread_proxy<std::__1::tuple<mbgl::Map::start(__vp=0x17d2ed70)::$_5> >(void*) + 274 at memory:2602
    frame #24: 0x3a974918 libsystem_pthread.dylib`_pthread_body + 140
    frame #25: 0x3a97488a libsystem_pthread.dylib`_pthread_start + 102
    frame #26: 0x3a972aa4 libsystem_pthread.dylib`thread_start + 8
(lldb) 

[ljbade]

I think this was fixed in 8cca0a2

@mb12 Can you test with latest master?

[ljbade]

Also @mb12 when you paste a crash log can you wrap it in ``` to make it readable, see https://help.github.com/articles/github-flavored-markdown/#fenced-code-blocks

[mb12]

Verified that the bug is fixed in the latest master.
Thanks for fixing it.