Fixed #7420 ((debug) Executable scope 'foo' with unknown function.)

lib/symboldatabase.cpp

@@ -1621,6 +1621,13 @@ bool Function::argsMatch(const Scope *scope, const Token *first, const Token *se
             // skip variable names
             first = first->next();
             second = second->next();
+
+            // skip default value assignment
+            if (first->next()->str() == "=") {
+                do {
+                    first = first->next();
+                } while (!Token::Match(first->next(), ",|)"));
+            }
         }
 
         // variable with class path

test/testsymboldatabase.cpp

@@ -276,6 +276,8 @@ private:
         TEST_CASE(lambda); // ticket #5867
         TEST_CASE(circularDependencies); // 6298
 
+        TEST_CASE(executableScopeWithUnknownFunction);
+
         TEST_CASE(valuetype);
     }
 
@@ -3119,6 +3121,28 @@ private:
               "}");
     }
 
+    void executableScopeWithUnknownFunction() {
+        GET_SYMBOL_DB("class Fred {\n"
+                      "    void foo(const std::string & a = "");\n"
+                      "};\n"
+                      "Fred::foo(const std::string & b) { }\n");
+
+        ASSERT(db && db->scopeList.size() == 3);
+        if (db && db->scopeList.size() == 3) {
+            std::list<Scope>::const_iterator scope = db->scopeList.begin();
+            ASSERT_EQUALS(Scope::eGlobal, scope->type);
+            ++scope;
+            ASSERT_EQUALS(Scope::eClass, scope->type);
+            const Scope * class_scope = &*scope;
+            ++scope;
+            ASSERT(class_scope->functionList.size() == 1);
+            if (class_scope->functionList.size() == 1) {
+                ASSERT(class_scope->functionList.begin()->hasBody());
+                ASSERT(class_scope->functionList.begin()->functionScope == &*scope);
+            }
+        }
+    }
+
     std::string typeOf(const char code[], const char pattern[], const char filename[] = "test.cpp") {
         Tokenizer tokenizer(&settings2, this);
         std::istringstream istr(code);