Fix issue 9900: False positive: Returning lambda that captures local variable 'x' that will be invalid when returning. (#2809)

lib/valueflow.cpp

@@ -3845,6 +3845,8 @@ static void valueFlowLifetime(TokenList *tokenlist, SymbolDatabase*, ErrorLogger
             }
 
             for (const Token * tok2 = lam.bodyTok; tok2 != lam.bodyTok->link(); tok2 = tok2->next()) {
+                if (!tok2->variable())
+                    continue;
                 captureVariable(tok2, lam.implicitCapture, isImplicitCapturingVariable);
             }
 

test/testautovariables.cpp

@@ -1914,6 +1914,15 @@ private:
               "    return [=, &i] { return j; };\n"
               "}\n");
         ASSERT_EQUALS("", errout.str());
+
+        check("void f(int*);\n"
+              "auto g(int y) {\n"
+              "    int x = y;\n"
+              "    return [=] {\n"
+              "        g(&x);\n"
+              "    };\n"
+              "}\n");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void danglingLifetimeContainer() {