Fix #11465 FP returnDanglingLifetime/returnTempreference with typeid (#4675)

Author: chrchr-github

lib/astutils.cpp

@@ -413,6 +413,8 @@ bool isTemporary(bool cpp, const Token* tok, const Library* library, bool unknow
     }
     if (Token::simpleMatch(tok, "(") && tok->astOperand1() &&
         (tok->astOperand2() || Token::simpleMatch(tok->next(), ")"))) {
+        if (Token::simpleMatch(tok->astOperand1(), "typeid"))
+            return false;
         if (tok->valueType()) {
             return tok->valueType()->reference == Reference::None;
         }

test/testautovariables.cpp

@@ -78,6 +78,7 @@ class TestAutoVariables : public TestFixture {
         TEST_CASE(testautovar_return2);
         TEST_CASE(testautovar_return3);
         TEST_CASE(testautovar_return4);
+        TEST_CASE(testautovar_return5);
         TEST_CASE(testautovar_extern);
         TEST_CASE(testautovar_reassigned);
         TEST_CASE(testinvaliddealloc);
@@ -577,6 +578,14 @@ class TestAutoVariables : public TestFixture {
         ASSERT_EQUALS("", errout.str());
     }
 
+    void testautovar_return5() { // #11465
+        check("struct S {};\n"
+              "const std::type_info* f() {\n"
+              "    return &typeid(S);\n"
+              "}\n");
+        ASSERT_EQUALS("", errout.str());
+    }
+
     void testautovar_extern() {
         check("struct foo *f()\n"
               "{\n"