View Compilation Error

0_0_21560681_28428.cpp: In function 'void solve()':
0_0_21560681_28428.cpp:13:1: error: unrecognizable insn:
 }
 ^
(insn 24 23 25 4 (set (reg:DI 1 dx)
        (plus:DI (symbol_ref:DI ("ans") [flags 0x2] <var_decl 000000000943fbe0 ans>)
            (reg:DI 121))) GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1967 -1
     (expr_list:REG_EQUAL (const:DI (plus:DI (symbol_ref:DI ("ans") [flags 0x2] <var_decl 000000000943fbe0 ans>)
                (const_int 4000000024 [0xee6b2818])))
        (nil)))
0_0_21560681_28428.cpp:13:1: internal compiler error: in extract_insn, at recog.c:2202
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