do not set values if there is no expression [skip ci]

Author: firewave

lib/programmemory.cpp

@@ -45,7 +45,13 @@
 #include <utility>
 #include <vector>
 
-ExprIdToken::ExprIdToken(const Token* tok) : tok(tok), exprid(tok ? tok->exprId() : 0) {}
+#include <iostream>
+
+ExprIdToken::ExprIdToken(const Token* tok) : tok(tok), exprid(tok ? tok->exprId() : 0)
+{
+    if (!tok)
+        std::cout << "ExprIdToken - no tok" << std::endl;
+}
 
 nonneg int ExprIdToken::getExpressionId() const {
     return tok ? tok->exprId() : exprid;
@@ -57,6 +63,12 @@ std::size_t ExprIdToken::Hash::operator()(ExprIdToken etok) const
 }
 
 void ProgramMemory::setValue(const Token* expr, const ValueFlow::Value& value) {
+    if (!expr)
+    {
+        std::cout << "setValue - no expr - " << value.toString() << std::endl;
+        return;
+    }
+
     copyOnWrite();
 
     (*mValues)[expr] = value;

lib/valueflow.cpp

@@ -6309,10 +6309,17 @@ static const Token* parseBinaryIntOp(const Token* expr,
     return varTok;
 }
 
+#include <iostream>
+
 const Token* ValueFlow::solveExprValue(const Token* expr,
                                        const std::function<std::vector<MathLib::bigint>(const Token*)>& eval,
                                        ValueFlow::Value& value)
 {
+    if (!expr)
+    {
+        std::cout << "solveExprValue - no expr" << std::endl;
+        return nullptr;
+    }
     if (!value.isIntValue() && !value.isIteratorValue() && !value.isSymbolicValue())
         return expr;
     if (value.isSymbolicValue() && !Token::Match(expr, "+|-"))