File if_this.patch of Package abuse
--- src1/lisp/lisp.cpp 2011-05-02 14:55:06.000000000 +0300 +++ src/lisp/lisp.cpp 2022-05-25 11:25:20.817592183 +0300 @@ -3080,7 +3080,7 @@ LObject *ret = NULL; - if (this) + volatile auto xex = this; if(xex) { switch (item_type(this)) {