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Fix Double Free in KeyValues #include macro
#86
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I don't know if this is the bug that the [valvesoftware wiki mentions](https://developer.valvesoftware.com/wiki/KeyValues#About_KeyValues_Text_File_Format:), but I have experienced memory corruption and segfaults (in other source games) from this bug.
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I don't know if this is the bug that the valvesoftware wiki mentions, but I have experienced memory corruption and segfaults (in other source games) from this bug.
Basically, the
AppendIncludedKeysfunction appends the includedKeyValuesdirectly, without reallocating. Then, the included KeyValues are freed, while in use.This commit removes the free.