View Compilation Error

0_0_22322491_32443.cpp: In function 'void __tcf_0()':
0_0_22322491_32443.cpp:84:2: error: unrecognizable insn:
 }ac;
  ^
(insn 6 5 7 2 (set (reg:DI 2 cx)
        (plus:DI (symbol_ref:DI ("ac") [flags 0x2] <var_decl 0000000003d0b980 ac>)
            (reg:DI 83))) GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_deque.h:923 -1
     (expr_list:REG_EQUAL (const:DI (plus:DI (symbol_ref:DI ("ac") [flags 0x2] <var_decl 0000000003d0b980 ac>)
                (const_int 44800001128 [0xa6e49c468])))
        (nil)))
0_0_22322491_32443.cpp:84:2: internal compiler error: in extract_insn, at recog.c:2202
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