Reproduction steps:

1. Open the attached "Stripped" project.
2. Build and run it for iOS.
3. Application crashes:

• thread #1: tid = 0x57c942, 0x00000001004a853c splashtest`::UpdateAllSkinnedMeshes() [inlined] capacity at dynamic_array.h:371, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x98)
• frame #0: 0x00000001004a853c splashtest`::UpdateAllSkinnedMeshes() [inlined] capacity at dynamic_array.h:371 [opt]

frame #1: 0x00000001004a853c splashtest`::UpdateAllSkinnedMeshes() [inlined] resize_buffer at dynamic_array.h:419 [opt]
frame #2: 0x00000001004a853c splashtest`::UpdateAllSkinnedMeshes() [inlined] resize_uninitialized at dynamic_array.h:287 [opt]

Regression introduced in:
5.6.0b5

Reproduced with;
5.6.0b5,
iPhone 6 iOS 9.0.2

Not reproducible with:
5.6.0b4

Note:
Full stack in the edit