g++ がおっしゃいました「前のエラーにより混乱していますので、脱出します」

VM.cpp:306: error: redefinition of ‘scheme::Object scheme::VM::callClosure(scheme::Object, scheme::Object)’
VM.cpp:282: error: ‘scheme::Object scheme::VM::callClosure(scheme::Object, scheme::Object)’ previously defined here
VM.cpp: In member function ‘scheme::Object scheme::VM::callClosure(scheme::Object, scheme::Object)’:
VM.cpp:327: error: cannot convert ‘scheme::Object(((const scheme::Object&)(& ret)))’ from type ‘scheme::Object’ to type ‘scheme::Object&’
VM.cpp:321: 前のエラーにより混乱していますので、脱出します