Segmentation fault 11 ios swift 1.2

I'm new to stackoverflow but I want to ask about a compiler error I got when compiling a quick project with some ObjC libraries.

`

0  swift                    0x0000000100dbba18 llvm::sys::PrintStackTrace(__sFILE*) + 40
1  swift                    0x0000000100dbbef4 SignalHandler(int) + 452
2  libsystem_platform.dylib 0x00007fff9500ef1a _sigtramp + 26
3  libsystem_platform.dylib 0x00007fff5f55b6e8 _sigtramp + 3394553832
4  swift                    0x00000001009b284c (anonymous namespace)::ObjCPrinter::print(swift::Type, llvm::Optional<swift::OptionalTypeKind>, llvm::StringRef) + 108
5  swift                    0x00000001009b6c9e std::__1::__function::__func<(anonymous namespace)::ModuleWriter::forwardDeclare(swift::EnumDecl const*)::'lambda'(), std::__1::allocator<(anonymous namespace)::ModuleWriter::forwardDeclare(swift::EnumDecl const*)::'lambda'()>, void ()>::operator()() + 238
6  swift                    0x00000001009b6afc (anonymous namespace)::ModuleWriter::forwardDeclare(swift::NominalTypeDecl const*, std::__1::function<void ()>) + 236
7  swift                    0x00000001009b6664 void llvm::function_ref<void ((anonymous namespace)::ReferencedTypeFinder&, swift::TypeDecl const*)>::callback_fn<(anonymous namespace)::ModuleWriter::forwardDeclareMemberTypes(swift::IteratorRange<swift::DeclIterator>)::'lambda'((anonymous namespace)::ReferencedTypeFinder&, swift::TypeDecl const*)>(long, (anonymous namespace)::ReferencedTypeFinder&, swift::TypeDecl const*) + 196
8  swift                    0x00000001009b689f swift::TypeVisitor<(anonymous namespace)::ReferencedTypeFinder, void>::visit(swift::Type) + 207
9  swift                    0x00000001009b690b swift::TypeVisitor<(anonymous namespace)::ReferencedTypeFinder, void>::visit(swift::Type) + 315
10 swift                    0x00000001009b696b swift::TypeVisitor<(anonymous namespace)::ReferencedTypeFinder, void>::visit(swift::Type) + 411
11 swift                    0x00000001009b02b8 (anonymous namespace)::ModuleWriter::forwardDeclareMemberTypes(swift::IteratorRange<swift::DeclIterator>) + 360
12 swift                    0x00000001009af26d swift::printAsObjC(llvm::raw_ostream&, swift::Module*, llvm::StringRef, swift::Accessibility) + 2957
13 swift                    0x00000001006a67ec printAsObjC(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, swift::Module*, llvm::StringRef, bool) + 332
14 swift                    0x00000001006a5016 frontend_main(llvm::ArrayRef<char const*>, char const*, void*) + 4998
15 swift                    0x00000001006a3ae6 main + 1814
16 libdyld.dylib            0x00007fff927975c9 start + 1
17 libdyld.dylib            0x000000000000009e start + 1837533910

      

        
        
        
      

    

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The project compiled and works fine on Xcode 6.2 and earlier, but when I try to compile it on Xcode 6.3 and 6.3.1, I got the command due to a signal: Segmentation fault 11. Can anyone help me? Thanks earlier.

EDIT: Just for your information, I am currently using two Xcode in the same Mac, Xcode 6.2 and 6.3.1, because Xcode 6.3.x cannot compile my project, so I am still using Xcode 6.2 trying to fix for 6.3.x ...