MFMailComposeViewController crashes on iOS7 simulator

[neoneye]

This is with Xcode 5.0 (5A11314m).
Crash happens both on iPhone and iPad.

2013-06-22 10:42:03.083 TestApp[547:c07] *** Assertion failure in -[A2DynamicDelegate implementMethod:withBlock:](), TestApp/Pods/BlocksKit/BlocksKit/A2DynamicDelegate.m:161
2013-06-22 10:42:03.086 TestApp[547:c07] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Attempt to implement instance selector with incompatible block (selector: -mailComposeController:didFinishWithResult:error:)'
*** First throw call stack:
(0x2a54028 0x26ce902 0x2a53ea8 0x6a5014 0x9f8f0 0x9a698 0x5c6ea 0x17efa 0x26e0a0c 0x11c3962 0x11c38ee 0x12ab122 0x12ab598 0x12aa7a1 0x11fde8d 0x11fe6e6 0x11d4276 0x11c253e 0x31699e4 0x29cf97d 0x29cf8d5 0x29cf60a 0x29fa032 0x29f959f 0x29f93eb 0x3129404 0x312922b 0x11bfb6b 0x1620c 0x35c0725 0x1)
libc++abi.dylib: terminating with uncaught exception of type NSException

[a2]

Fixed in 964e24b.