pod trunk push --verbose error

[shogo4405]

/var/folders/x2/_jy7nvq93_q6clqh396jyjk00000gn/T/CocoaPods/Lint/build/Pods.build/Release-iphonesimulator/lf.build/Objects-normal/x86_64/RTMPMessage.swiftdeps -o /var/folders/x2/jy7nvq93_q6clqh396jyjk00000gn/T/CocoaPods/Lint/build/Pods.build/Release-iphonesimulator/lf.build/Objects-normal/x86_64/RTMPMessage.o
0 swift 0x000000010eb004eb llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 43
1 swift 0x000000010eaff7d6 llvm::sys::RunSignalHandlers() + 70
2 swift 0x000000010eb00b4f SignalHandler(int) + 287
3 libsystem_platform.dylib 0x00007fff91e2f52a sigtramp + 26
4 libsystem_platform.dylib 0x00007fff00010000 sigtramp + 1847462640
5 swift 0x000000010cae7144 swift::SILCombiner::doOneIteration(swift::SILFunction&, unsigned int) + 196
6 swift 0x000000010cae78f9 swift::SILCombiner::runOnFunction(swift::SILFunction&) + 297
7 swift 0x000000010cae7d65 (anonymous namespace)::SILCombine::run() + 197
8 swift 0x000000010cb39145 swift::SILPassManager::runPassesOnFunction(llvm::ArrayRefswift::SILFunctionTransform*, swift::SILFunction) + 1189
9 swift 0x000000010cb39d94 swift::SILPassManager::runFunctionPasses(llvm::ArrayRefswift::SILFunctionTransform_) + 804
10 swift 0x000000010cb3ace0 swift::SILPassManager::runOneIteration() + 608
11 swift 0x000000010cb40d05 swift::runSILOptimizationPasses(swift::SILModule&) + 213
12 swift 0x000000010c855309 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&) + 13193
13 swift 0x000000010c85141d frontend_main(llvm::ArrayRef<char const*>, char const, void) + 2781
14 swift 0x000000010c84ce3c main + 1932
15 libdyld.dylib 0x00007fff92bce5ad start + 1

The following build commands failed:
CompileSwift normal x86_64 /var/folders/x2/_jy7nvq93_q6clqh396jyjk00000gn/T/CocoaPods/Lint/Pods/lf/lf/RTMP/RTMPMessage.swift
CompileSwiftSources normal x86_64 com.apple.xcode.tools.swift.compiler
(2 failures)
-> lf (0.2)
- ERROR | [iOS] xcodebuild: Returned an unsuccessful exit code.

[!] The podspec does not validate.

[shogo4405]

ceylon:lf.swift shogo$ xcodebuild -version
Xcode 7.3
Build version 7D175

[shogo4405]

ceylon:lf.swift shogo$ pod lib lint
-> lf (0.2)
lf passed validation.