BigInteger: guard against self-assignment

Related-to: #404. Suggested-by: @cosinekitty

BigInteger: guard against self-assignment
Related-to: #404. Suggested-by: @cosinekitty
afbc0406 · Philipp A. Hartmann · 3cf7228f · afbc0406
Commit afbc0406 authored Aug 13, 2015 by Philipp A. Hartmann
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Showing with 4 additions and 2 deletions

biginteger.h include/rapidjson/internal/biginteger.h +4 -2

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--- a/include/rapidjson/internal/biginteger.h
+++ b/include/rapidjson/internal/biginteger.h
@@ -54,8 +54,10 @@ public:
    
    BigInteger& operator=(const BigInteger &rhs)
    {
-        count_ = rhs.count_;
-        std::memcpy(digits_, rhs.digits_, count_ * sizeof(Type));
+        if (this != &rhs) {
+            count_ = rhs.count_;
+            std::memcpy(digits_, rhs.digits_, count_ * sizeof(Type));
+        }
        return *this;
    }