Fix #14193 FP knownConditionTrueFalse for loop references to container elements (#7884)

Co-authored-by: chrchr-github <[email protected]>

Author: chrchr-github

lib/astutils.cpp

@@ -1203,6 +1203,8 @@ static const Token * followVariableExpression(const Settings& settings, const To
         return tok;
     if (hasUnknownVars(varTok))
         return tok;
+    if (astIsRangeBasedForDecl(var->nameToken()))
+        return tok;
     if (var->isVolatile())
         return tok;
     if (!var->isLocal() && !var->isConst())

test/testother.cpp

@@ -8040,6 +8040,15 @@ class TestOther : public TestFixture {
               "    }\n"
               "}\n");
         ASSERT_EQUALS("", errout_str());
+
+        check("void f(const std::vector<int>& v) {\n" // #14193
+              "    for (const int& r1 : v) {\n"
+              "        for (const int& r2 : v) {\n"
+              "            if (&r1 == &r2) {}\n"
+              "        }\n"
+              "    }\n"
+              "}\n");
+        ASSERT_EQUALS("", errout_str());
     }
 
     void duplicateExpressionTernary() { // #6391