Fix #14482 (False negative: missingReturn not reported for function that returns a std::int32_t) (#8256)

Author: danmar

lib/symboldatabase.cpp

@@ -3342,8 +3342,12 @@ static bool checkReturns(const Function* function, bool unknown, bool emptyEnabl
     assert(defEnd != defStart);
     if (pred(defStart, defEnd))
         return true;
-    if (isUnknownType(defStart, defEnd))
+    if (isUnknownType(defStart, defEnd)) {
+        const Token* tok = function->token ? function->token->next() : function->tokenDef->next();
+        if (tok->valueType() && tok->valueType()->type >= ValueType::Type::RECORD)
+            return false;
         return unknown;
+    }
     return false;
 }
 

test/testfunctions.cpp

@@ -86,6 +86,7 @@ class TestFunctions : public TestFixture {
         TEST_CASE(checkMissingReturn5);
         TEST_CASE(checkMissingReturn6); // #13180
         TEST_CASE(checkMissingReturn7); // #14370 - FN try/catch
+        TEST_CASE(checkMissingReturnStdInt); // #14482 - FN std::int32_t
 
         // std::move for locar variable
         TEST_CASE(returnLocalStdMove1);
@@ -1918,6 +1919,11 @@ class TestFunctions : public TestFixture {
         ASSERT_EQUALS("[test.cpp:3:19]: (error) Found an exit path from function with non-void return type that has missing return statement [missingReturn]\n", errout_str());
     }
 
+    void checkMissingReturnStdInt() {// #14482 - FN
+        check("std::int32_t f() {}\n");
+        ASSERT_EQUALS("[test.cpp:1:19]: (error) Found an exit path from function with non-void return type that has missing return statement [missingReturn]\n", errout_str());
+    }
+
     // NRVO check
     void returnLocalStdMove1() {
         check("struct A{}; A f() { A var; return std::move(var); }");