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a/src/utils/refcntr.h b/src/utils/refcntr.h
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    int *pcount;
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    int *pcount;
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public:
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public:
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    RefCntr() 
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    RefCntr() 
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    : rep(0), pcount(0) 
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    : rep(0), pcount(0) 
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    {}
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    {}
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    RefCntr(X *pp) 
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    explicit RefCntr(X *pp) 
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    : rep(pp), pcount(new int(1)) 
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    : rep(pp), pcount(new int(1)) 
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    {}
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    {}
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    RefCntr(const RefCntr &r) 
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    RefCntr(const RefCntr &r) 
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    : rep(r.rep), pcount(r.pcount) 
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    : rep(r.rep), pcount(r.pcount) 
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    { 
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    {